EP1990079A1

EP1990079A1 - Drawing toy and drawing toy set employing it

Info

Publication number: EP1990079A1
Application number: EP07713804A
Authority: EP
Inventors: Akio Nakashima
Original assignee: Pilot Ink Co Ltd
Current assignee: Pilot Ink Co Ltd
Priority date: 2006-01-30
Filing date: 2007-01-29
Publication date: 2008-11-12
Also published as: WO2007086609A1; EP1990079A4; JPWO2007086609A1; CA2640188A1; US20100248585A1

Abstract

An drawing toy 1 having a excellent performance in play to which water is applied to form images such as letters or characters, and patterns or designs, which are perceivable as images having brilliance is constituted of an drawable member 2 having a light-transmitting support 3 and provided on the surface thereof a porous layer 4 in which a low refractive index pigment has been made dispersedly fixed to a blinder resin and which comes different in transparency between a liquid-absorbed condition and a liquid-non-absorbed condition, and a light source 5 which irradiates the back surface of the drawable member with light. A drawing toy set is constituted of the drawing toy 1 and a water-applying implement 15.

Description

TECHNICAL FIELD

This invention relates to a drawing toy in which images such as letters or characters and patterns or designs having brilliance can be formed by applying water thereto, and a drawing toy set making use of the same.

BACKGROUND ART

Conventionally, a water image sheet is disclosed, having a support and provided thereon a porous layer in which a low refractive index pigment has been made dispersedly fixed to a binder resin and which comes different in transparency between a liquid-absorbed condition and a liquid-non-absorbed condition (see, e.g., Japanese Patent Publication No. S63-58711 ).
In this sheet, the porous layer conceals its underlying layer when it stands dry (it is in the liquid-non-absorbed condition), and turns transparent when a liquid such as water is made absorbed in the porous layer, whereby images such as letters or characters and patterns or designs can be formed, reflecting a color(s) the underlying layer has.
A moisture-sensitive color-changeable textile printing agent is also disclosed, containing finely particulate silicic acid and an iridescent pearl pigment; the agent being applied to a support of various types by printing (see, e.g., Japanese Patent Application Laid-open No. H01-260075 ).
This moisture-sensitive color-changing textile printing agent takes on white in virtue of the finely particulate silicic acid when it stands dry, and the finely particulate silicic acid turns transparent when it stands wet with water, where the color of the iridescent pearl pigment is perceivable with the eyes.
However, the color produced by the iridescent pearl pigment is not sharp when compared with colors produced by commonly available dyes and pigments. In addition, a difficulty may come about such that the color of the substrate is limited to black color or dark colors in order for the color of the iridescent pearl pigment to be sufficiently perceivable with the eyes.

PROBLEM(S) THE INVENTION INTENDS TO SOLVE

The present invention provides a drawing toy having a porous layer of which water is applied to form images such as letters or characters and patterns or designs, and which improves in commerciality and play performance by imparting brilliance to the images formed, and a drawing toy set using the same.

DISCLOSURE OF THE INVENTION

The drawing toy of present invention comprises a drawable member that can write or draw on, having a light-transmitting support and provided on the surface thereof a porous layer in which a low refractive index pigment has been made dispersedly fixed to a binder resin and which comes different in transparency between a liquid-absorbed condition and a liquid-non-absorbed condition, and a light source which irradiates the back surface of the drawable member with light.
Further, the present invention may preferably require that at least one of the light-transmitting support and the porous layer contains a coloring agent; that a non-color-changeable layer containing a coloring agent is provided between the light-transmitting support and the porous layer and/or on the back surface of the light-transmitting support; that the coloring agent is selected from a fluorescent pigment, a fluorescent dye, a fluorescent brightening pigment and a fluorescent brightening dye; that the light-transmitting support holds the light source therein; that the drawing toy has a container which holds the light source therein, and the container has, at its part where the drawable member is disposed, a light-transmitting part which transmits light from the light source; that the drawing toy has a container which holds the light source therein, and the container is provided with an opening through which the drawable member is irradiated on the back surface thereof with the light from the light source, where the drawable member is so constructed as to be detachably mountable to the opening; that the container is provided with a light-transmitting member at the opening, and the drawable member is disposed on the light-transmitting member; that the light-transmitting member stands colored; that the drawing toy has a container which holds the light source therein, and the container is provided with an opening through which the drawable member is irradiated on the back surface thereof with the light from the light source, where the drawable member is fastened to the container at the opening thereof; that the drawing toy has a plurality of drawable members; that the drawing toy has a plurality of light sources different in colors; that the drawing toy has a colored filter which changes the color of the light source; that the drawing toy has a light-transmitting pattern sheet provided between the light source and the drawable member; that the drawing toy has a light-transmitting sheet provided between the light source and the drawable member and a writing implement with which an erasable written image is formed on the light-transmitting sheet; that the container holds therein an optical member which reflects and/or refracts the light from the light source; or that the light from the light source is at least one of visible light and ultraviolet light.
Another embodiment of the present invention comprises the above drawing toy and a water-applying implement.
According to the present invention, images such as letters or characters and patterns or designs formed by applying water to the porous layer are irradiated with light from through the back surface thereof, and hence the color the images have and the light act together to make the images perceivable with the eyes as images having brilliance. Accordingly, the present invention can provide a drawing toy which has a high commercial value and excellent performance in play, and a drawing toy set using the same.
According to the present invention, water is applied to the porous layer standing dry that has been formed in the drawable member, to bring it into a liquid-absorbed condition, whereupon the porous layer becomes light-transmitting, and the drawable member is irradiated with light on its back surface by means of the light source, whereby the images at the liquid-absorbed areas are perceivable with the eyes in the state they have brilliance. Such a drawing toy is provided according to the present invention.
As the light-transmitting support that constitutes the drawable member, any support may all be used as long as it is made of a material having light-transmitting properties. Such a material may include glass, plastics, cloths such as textile, knitting, braid and non-woven fabric, porcelain, and paper.
The plastics may be exemplified by plastic molded products, and plastic sheets, of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polymethyl methacrylate, polyacrylate, polystyrene, polycarbonate, cellulose triacetate, cellulose diacetate, polyvinyl alcohol, polyamide and so forth. Plastic sheets of polyethylene, polypropylene, polyethylene terephthalate and polyvinyl chloride may preferably be used, as being excellent in flexibility and safety.
The support may be colorless light-transmitting, or may instead be semi light-transmitting or may be colored light-transmitting, as long as it has light-transmitting properties.
The porous layer provided on the light-transmitting support is a layer in which a low refractive index pigment has been made dispersedly fixed to a binder resin and which comes different in transparency between a dry condition and a liquid-absorbed condition.
The low refractive index pigment may preferably include silicic acid and salts thereof, barite powder, barium sulfate, barium carbonate, calcium carbonate, gypsum, clay, talc, alumina white and magnesium carbonate. These have refractive index within the range of from 1.4 to 1.8, and exhibit good transparency upon absorption of water.
The salts of the silicic acid may include aluminum silicate, aluminum potassium silicate, aluminum sodium silicate, aluminum calcium silicate, potassium silicate, calcium silicate, calcium sodium silicate, sodium silicate, magnesium silicate and magnesium potassium silicate.
The low refractive index pigment may also be used in combination of two or more types.
There are no particular limitations on particle diameter of the low refractive index pigment. Those having a particle diameter of from 0.03 µm to 10.0µm may preferably be used.
As a low refractive index pigment that may preferably be used is a silicic acid.
The silicic acid may be silicic acid produced by a dry process, and silicic acid produced by a wet process (hereinafter "wet-process silicic acid") is especially effective. To describe this point, the silicic acid is produced as amorphous, non-crystalline silicic acid, and is roughly classified by its production process into silicic acid produced by a dry process (hereinafter "dry-process silicic acid"), which makes use of gas-phase reaction such as thermal decomposition of a silicon halide such as silicon tetrachloride, and the wet-process silicic acid, which makes use of liquid-phase reaction such as decomposition of sodium silicate or the like by acid. The silicic acid differs in structure between the dry-process silicic acid and the wet-process silicic acid. The dry-process silicic acid forms a three-dimensional structure in which the silicic acid has densely combined, whereas the wet-process silicic acid has what is called a two-dimensional structure moiety in which the silicic acid has condensed to form a long molecular arrangement.
Thus, because of a coarser molecular structure than that of the dry-process silicic acid, the wet-process silicic acid, when used in the porous layer, is superior in irregularly light reflecting properties in a dry condition, compared with a system using the wet-process silicic acid, and hence can have a greater hiding power in a usual condition, as so presumed.
In addition, in the porous layer, the water is made absorbed, and hence the wet-process silicic acid may preferably be used because it has a larger number of hydroxyl groups present as silanol groups on the particle surfaces than the dry-process silicic acid and is greatly hydrophilic.
In order to control the hiding power in a usual condition of the porous layer and the transparency in a liquid-absorbed condition of the same, it is also possible to use other general-purpose low refractive index pigment as above-mentioned together with the wet-process silicic acid.
In order to satisfy both the hiding power in a usual condition and the transparency in a liquid-absorbed condition, the low refractive index pigment in the porous layer may preferably be used in a coating weight of from 1 g/m² to 30 g/m², and more preferably from 5 g/m² to 20 g/m², which may depend on its properties such as particle diameter, specific surface area and oil absorption. If it is in a coating weight of less than 1 g/m², it is difficult to achieve any sufficient hiding power in the usual condition. If it is in a coating weight of more than 30 g/m², it is difficult to achieve any sufficient transparency in the liquid-absorbed condition.
The low refractive index pigment is dispersed in a vehicle containing a binder resin as a binding agent, which is then coated on the light-transmitting support, followed by removal of volatile components by drying to form the porous layer.
The binder resin may include urethane resins, nylon resins, vinyl acetate resins, acrylate resins, acrylate copolymer resins, acrylic polyol resins, vinyl chloride-vinyl acetate copolymer resins, maleic acid resins, polyester resins, styrene resins, styrene copolymer resins, polyethylene resins, polycarbonate resins, epoxy resins, styrene-butadiene copolymer resins, acrylonitrile-butadiene copolymer resins, methyl methacrylate-butadiene copolymer resins, butadiene resins, chloroprene resins, melamine resins, and resin emulsions of all the foregoing, as well as casein, starch, cellulose derivatives, polyvinyl alcohol, urea resins and phenolic resins.
The low refractive index pigment and any of these binder resins may be mixed in such a proportion that the binder resin is in an amount of from 0.5 to 2 parts by weight based on 1 part by weight of the low refractive index pigment, and more preferably from 0.8 to 1.5 parts by weight based on 1 part by weight of the low refractive index pigment, which may depend on the type and properties of the low refractive index pigment. If the binder resin is in an amount of less than 0.5 part by weight based on 1 part by weight of the low refractive index pigment, it is difficult to achieve any practical film strength of the porous layer. If the binder resin is in an amount of more than 2 parts by weight based on 1 part by weight of the low refractive index pigment, the water may be poorly permeable into the porous layer.
As compared with conventionally known general coating film, the porous layer described above has a smaller binder resin proportion to the pigment and is hence less apt to have sufficient film strength. Consequently, for use in applications where abrasion resistance is required, it is preferred to use nylon resins or urethane resins among the above binder resins.
The urethane resins may include polyester type urethane resins, polycarbonate type urethane resins and polyether type urethane resins, any of which may be used in combination of two or more types. Also usable are urethane type emulsion resins in which any of the above resins has been dispersed in water by emulsification, and colloidal dispersion type (ionomer type) urethane resins in which the resin has been dissolved or dispersed in water by self-emulsification without requiring any emulsifying agent in virtue of the ionic groups of urethane resins (urethane ionomers) themselves having ionic properties.
As the urethane resins, either of water-based urethane resins and oil-based urethane resins may be used. In the present invention, what may preferably be used are water-based urethane resins, in particular, the urethane type emulsion resins and the colloidal dispersion type urethane resins.
Any of the above urethane resins may be used alone, and may also be used in combination with other binder resin in accordance with the type of the light-transmitting support and the performance required as films. When used in combination with a binder resin other than the urethane resins, it is preferable for any of the urethane resins to be contained in the binder resin of the porous layer in an amount of 30% or more as solid content weight ratio in order to achieve practical film strength.
When a cross-linkable binder resin is used, the film strength may be improved by adding any desired cross-linking agent.
The binder resins illustrated above vary in affinity for water. By using a suitable combination of two or more of these, it is possible to regulate the time required for water to penetrate-into the porous layer, and degree of permeation, and the rate of drying after permeation. It is also possible to control the-above regulation by suitably adding a dispersant or a surface active agent.
The porous layer may be formed on the light-transmitting support by printing means such as screen printing, offset printing, gravure printing, coater printing, pad printing, or transfer; or brush coating, spray coating, electrostatic coating, electrodeposition coating, cast coating, roller coating or dip coating.
The drawable member obtained as described above may be incorporated with a coloring agent in the light-transmitting support or porous layer to have colored transparency so as to achieve various color-changes.
A non-color-changeable layer (colored light-transmitting layer) may also be provided between the light-transmitting support and the porous layer or on the back surface of the light-transmitting support so as to achieve various color-changes.
The coloring agent may include commonly available color dyes, and besides fluorescent pigments and fluorescent dyes, any of which may be used.
The drawable member that constitutes the drawing toy may be a single member, or may have a plurality of drawable members colored with coloring agents having different colors.
In the present invention, the drawing toy has the light source which irradiates the back surface of the drawable member with light.
The light source may include incandescent lamps, halogen lamps, luminescent lamps such as a fluorescent lamp, a metal halide lamp, a sodium lamp and a mercury lamp, light-emitting diodes, lasers, and ultraviolet lamps.
The light source may be so set up as to directly irradiate the back surface of the drawable member with light, or may instead preferably be so set up as to irradiate the back surface of the drawable member with light as far as possible by indirectly irradiating the back surface of the drawable member with light via an optical member which reflects or refracts the light from the light source.
The light source may be a light source kept always turned on, or may instead be so set up that it can be switched between being always turned on and being turned on or off so as to be set variable, or the light source itself may be moved or rotated so as to be set variable.
A drawable member may be used in which a coloring agent selected from a fluorescent pigment, a fluorescent dye, a fluorescent brightening pigment and a fluorescent brightening dye is blended in the light-transmitting support or porous layer, or a drawable member may be used in which a non-color-changeable layer containing a coloring agent selected from a fluorescent pigment, a fluorescent dye, a fluorescent brightening pigment and a fluorescent brightening dye is provided between the light-transmitting support and the porous layer or on the back surface of the 1 light-transmitting support. In such a case, a light source which can emit light having ultraviolet rays, stated specifically, a fluorescent lamp, a light-emitting diode which can emit light having ultraviolet rays or an ultraviolet lamp may be used as the light source. This enables formation of fluorescent color images having brilliance, and enables much more improvement in commerciality.
The light source may be so set up as to be bare to the outside, or may be so set up as to be held in a container or the like.
In the case when it is held in a container, there are no particular limitations on the position where the light source is to be attached. It may be provided at the bottom of the container, or may instead be provided on the side of the container.
The material of the container may be selected from plastic, glass, rubber, metal, wood, porcelain and stone.
The container of the light source may be a separate part from the light-transmitting support. Alternatively, the light-transmitting support itself, which supports the porous layer, may be a container of the light source
The structure of the container which is a separate part from the light-transmitting support and holds the light source therein, may be shown below.
The container may have a hollow structure, in the interior of which the light source is held.
Stated specifically, the container may be so set up that the container holds the light source therein and the container is provided with an opening through which the drawable member is irradiated on the back surface thereof with the light from the light source, where the drawable member is fastened thereto at the opening.
The container may further be so set up that the container holds the light source therein and the container is provided with an opening through which the drawable member is irradiated on the back surface thereof with the light from the light source, where the drawable member is set detachably mountable to the opening.
In this case, the light-transmitting support that constitutes the drawable member may preferably be a platelike member of a hard resin molded product which facilitates image forming performance.
The container may still further be so set up that the container is provided with a light-transmitting member at the opening and the drawable member is disposed on the light-transmitting member. This is applicable also when the drawable member is a soft member made of film, cloth or the like.
Where this light-transmitting member has colored transparency, the drawable member may be disposed on the light-transmitting member and the water may be made absorbed in the porous layer. Thus, images with brilliance which have a color different from that of the light of the light source are made perceivable with the eyes.
Further, a plurality of light-transmitting members different in colors may be set detachably mountable, where the drawable member may be disposed on the light-transmitting members and the water may be made absorbed in the porous layer. Thus, images with brilliance which have colors different from the color of the light of the light source are made perceivable with the eyes.
As long as the container has light-transmitting properties, it need not have the opening, where the drawable member may be disposed on the surface of the container and the water may be made absorbed in the porous layer. Thus, images with brilliance are made perceivable with the eyes.
The container may be a container which is light-transmitting, semitransparent, colored transparent or light-screenable at its part to or on which the drawable member is fastened or disposed, or may instead be a container having light-screening areas and light-transmitting areas mixedly.
As described previously, the drawing toy may have a plurality of drawable members or may have a plurality of light-transmitting members different in colors, whereby images with brilliance which have various colors are made perceivable with the eyes. Images with brilliance in variety may also be made perceivable with the eyes by changing the light source in colors.
As a means for changing the light source in colors, it may be so set up that a plurality of light sources different in colors are provided, where a single light source is selectively made to emit light or the plurality of light sources are simultaneously made to emit light, or it may be so set up that a colored filter which changes the color of the light source is provided and is set between the light source and the drawable member.
Further, a light-transmitting pattern sheet may be provided which is set between the light source and the drawable member. Thus, a drawing toy is obtained which is suited to a line drawing for coloring and a trace drawing.
The light-transmitting pattern sheet is a light-transmitting sheet provided with various letters or characters, symbols, figures, designs and/or the like. A light-transmitting pattern sheet is preferred which is appropriately provided with outline images. It may also be a light-transmitting pattern sheet in which the outline images have been colored on the insides thereof with a light-transmitting coloring agent.
The drawing toy may also have a light-transmitting sheet provided between the light source and the drawable member and a writing implement with which an erasable written image is formed on the light-transmitting sheet. Thus, a drawing toy is obtained on which a line drawing for coloring and a trace drawing can be made as desired.
AS the writing implement which provide an erasable written image, a marking pen for a writing board may preferably be used which holds an ink containing at least a pigment, mediums such as an organic solvent or water, a resin and a separating agent.
As a power source for making the light source emit light, electricity may be supplied from a socket, or a power source such as a dry cell (battery) may be used. Such a method may be employed, but the drawing toy may be so set up that a power source is held inside the main body and this is preferable because outside the main body there is no obstacle electric cord for supplying electricity.
The dry cell may be either of a primary cell and a secondary cell. The electricity may also be obtained from a solar cell.
A switch may also optionally be provided. As a means for applying water to the porous layer of the drawable member, your hand or finger may be made wet with water to touch the porous layer. Instead, the water may be applied by using a writing implement or applicator having at its end a writing brush, a fibrous pen point or the like. Also usable are a water-applying implement having a container which holds water therein and a writing implement or applicator which is provided with a fibrous member or a brush through which the water in the container is led out to apply the water to the porous layer, and a water-applying implement having the form of a stamp or a roller.
The above water-applying implement and drawing toy may be combined to obtain a drawing toy set.
As a preferred water-applying implement, it may be a writing implement or applicator in which a plastic porous material having open cells or a fibrous work is used as a pen point member, and this can form written images in a simple and easy way and can improve practical performance.
In the above implement, the plastic porous material having open cells or the fibrous work may be any material as long as it absorbs and puts out the water appropriately, and may include polyolefin type, polyurethane type or other various plastic type open-cell materials, writing-brush-shaped materials formed by bunching fibers, fibers having been resin-treated or heat-fused, and materials having the form of felt or non-woven fabric. Their shapes and sizes may be set as desired according to purposes.
Together with the writing implement or applicator for applying the water, the drawing toy may further have a stencil, and this enables simple and easy formation of images.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a longitudinal section of a working example of the drawing toy of the present invention.
FIG. 2 is a longitudinal section of another working example of the drawing toy of the present invention.
FIG. 3 is a longitudinal section of still another working example of the drawing toy of the present invention.
FIG. 4 is a longitudinal section of a further working example of the drawing toy of the present invention.
FIG. 5 is a longitudinal section of a still further working example of the drawing toy of the present invention.
FIG. 6 is a diagrammatic perspective view showing how images are drawn using a drawing toy set consisting of a drawable member according to any of Examples 1 to 9 and a water-applying implement, of the present invention.

BEST MODES FOR PRACTICING THE INVENTION

Working examples of the present invention are given below. The present invention is by no means limited to these working examples. In the following working examples, "part(s)" refers to "part(s) by weight".

Example 1 (see FIG. 1)

To the top surface of a hollow box-shaped light-transmitting support 3 made of colorless transparent acrylic resin, a white spraying ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 50 parts of urethane emulsion (trade name: HYDRAN HW-350; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent and 1 part of an epoxy resin type cross-linking agent was applied by spray coating, followed by drying and hardening at 70°C for 5 minutes to form a porous layer 4 to obtain an drawable member 2.
The drawable member 2 was set holding in the interior thereof an incandescent lamp as a light source 5 and a dry cell as a power source to obtain a drawing toy 1.
The light source and the power source stand electrically connected with each other.
This drawing toy 1 is such that the porous layer takes on white when it stands dry, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface, and hence are perceivable with the eyes as images having brilliance.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, whereupon written images 21 having brilliance become perceivable with the eyes.
Further, as the porous layer becomes dry, the written images 21 become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 2

To the top surface of a hollow box-shaped light-transmitting support made of colorless transparent acrylic resin, a white spraying ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 50 parts of urethane emulsion (trade name: HYDRAN HW-350; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent and 1 part of an epoxy resin type cross-linking agent was applied by spray coating, followed by drying and hardening at 70°C for 5 minutes to form a porous layer to obtain a drawable member.
The drawable member was set holding in the interior thereof an incandescent lamp as a light source, a reflecting material which makes light reflect therefrom, a lens which diffuses light, a disk-like colored filter having blue, red and yellow transparent films which makes the light source change in colors, and a dry cell as a power source to obtain a drawing toy.
The light source and the power source stand electrically connected with each other. This drawing toy is such that the porous layer takes on white when it stands dry, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently and uniformly in virtue of the reflecting material and the lens, thus the images are perceivable with the eyes as images having brilliance.
The images change selectively in colors as the colored filter is turned, thus images with brilliance in blue, red or yellow are perceivable with the eyes. Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, whereupon written images having brilliance in blue, red or yellow become perceivable with the eyes.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 3 (see FIG. 2)

To the surface of a platelike light-transmitting support 3 (thickness: 3 mm) made of milk-white acrylic resin, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 50 parts of urethane emulsion (trade name: HYDRAN HW-350; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of an isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 70°C for 5 minutes to form a porous layer 4 to obtain a drawable member 2.
Then, a hollow container 6 made of white polypropylene resin and having an opening 6a was set holding therein blue, red and yellow incandescent lamps as a light source 5, a reflecting material which makes light reflect therefrom, a lens which diffuses light and a dry cell as a power source. To the opening of this container, the drawable member was fastened to obtain a drawing toy 1.
The light source and the power source stand electrically connected with each other.
The drawing toy 1 set up as described above is such that the porous layer takes on white when it stands dry, and it turns semitransparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material and the lens, thus the images are perceivable with the eyes as images having brilliance.
The images change selectively in colors with selection of the light sources, thus images with brilliance in blue, red or yellow are perceivable with the eyes.
In addition, the light sources may be turned on or off, or the blue, red and yellow light sources may sequentially be turned on, thus images set variable are perceivable with the eyes.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such an drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, whereupon written images having brilliance in blue, red or yellow become perceivable with the eyes.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 4

To the surface of a platelike light-transmitting support (thickness: 2 mm) made of blue transparent acrylic resin, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200A; available from Nippon Silica Industrial Co., Ltd.), 50 parts of urethane emulsion (trade name: HYDRAN HW-350; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of an isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 70°C for 5 minutes to form a porous layer to obtain a drawable member A capable of changing in colors from white to blue upon application of water.
Separately from this, to the surface of a platelike light-transmitting support (thickness: 2 mm) made of red transparent acrylic resin, the same white screen printing ink as the above was applied to form a porous layer to obtain a drawable member B capable of changing in colors from white to red upon application of water.
Then, a hollow container made of white polypropylene resin and having an opening was set holding therein an incandescent lamp as a light source 5, a reflecting material which makes light reflect therefrom, a lens which diffuses light and a dry cell as a power source, where the drawable member A and the drawable member B were set detachably mountable to the container at its opening, to obtain a drawing toy.
The light source and the power source stand electrically connected with each other.
This drawing toy is such that the porous layer takes on white when it stands dry in the state the drawable member A is mounted to the container at its opening, and it turns semitransparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material and the lens, thus the images are perceivable with the eyes as blue images having brilliance.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Next, in the state the drawable member B is mounted to the container at its opening, water is applied to its porous layer, whereupon the porous layer turns semitransparent, thus images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material and the lens, thus the images are perceivable with the eyes as red images having brilliance.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, whereupon written images having brilliance in blue or red become perceivable with the eyes.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable (with the eyes.
Such phase changes were repeatedly achievable.

Example 5 (see FIG. 3)

To the surface of a sheetlike light-transmitting support 3 (thickness: 100 µm; 30 cm × 40 cm in size) made of colorless transparent polyethylene terephthalate resin, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 30 parts of urethane emulsion (trade name: HYDRAN HW-930; available from Dainippon Ink & Chemicals, Inc.; solid content: 50%), 50 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of a blocked isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer 4 to obtain an drawable member 2.
Then, a hollow container 6 made of white polypropylene resin and having an opening was set holding therein a fluorescent lamp as a light source 5, a reflecting material which makes light reflect therefrom and a dry cell as a power source, where three light-transmitting members were each set detachably mountable to the container at its opening, to obtain a drawing toy 1.
The light-transmitting members are blue, red and yellow platelike members made of transparent polycarbonate resin for each.
The light source and the power source stand electrically connected with each other.
This drawing toy is such that the porous layer takes on white when it stands dry in the state the blue light-transmitting member is set on the container at its opening and the drawable member is placed on the light-transmitting member, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material, thus the images are perceivable with the eyes as blue images having brilliance, conjointly with the color the light-transmitting member has.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
This light-transmitting member may be changed for another, thus images are perceivable with the eyes as images having brilliance in red or yellow. The blue and yellow light-transmitting members may be set superposed, thus images are also perceivable with the eyes as images having brilliance in green.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that any one color member of the three light-transmitting members is set, or two or more members thereof are set superposed, on the container at its opening, in the state of which the pen holding the water therein is used to write down images on the porous layer, whereupon written images having brilliance in blue, red, yellow, green, purple or orange become perceivable with the eyes conjointly with the colors the light-transmitting members have.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 6

To the surface of a light-transmitting support made of pink nylon taffeta cloth having been subjected to water-repellent treatment (fiber weight of the support: 70 g/m²; 40 cm × 50 cm in size), a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process fine silica powder (trade name: NIPSIL E-220; available from Nippon Silica Industrial Co., Ltd.), 45 parts of urethane emulsion (trade name: HYDRAN AP-10; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of a blocked isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer to obtain a drawable member C capable of changing in colors from white to pink upon application of water.
Separately from this, to the surface of a light-transmitting support made of blue nylon taffeta cloth having been subjected to water-repellent treatment (fiber weight of the support: 70 g/m²; 40 cm × 50 cm in size), the same white screen printing ink as the above was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer to obtain a drawable member D capable of changing in colors from white to blue upon application of water.
Then, a hollow container made of white polypropylene resin and having an opening was set holding therein a fluorescent lamp as a light source 5, a reflecting material which makes light reflect therefrom and a power source electric cord, where two light-transmitting members were set detachably mountable to the container at its opening, to obtain a drawing toy.
The light-transmitting members are colorless and yellow platelike members made of transparent polycarbonate resin for each.
The light source and the power source electric cord stand electrically connected with each other, and are so set up that electricity can be supplied from the outside via a socket to which the power source electric cord is connected at its end.
This drawing toy is such that the porous layer takes on white when it stands dry in the state the colorless light-transmitting member is set on the container at its opening and the drawable member C is placed on the light-transmitting member, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material, thus the images are perceivable with the eyes as pink images having brilliance.
As the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Then, the drawable member D is mounted and like operation is repeated, thus the images are perceivable with the eyes as blue images having brilliance.
Further, the porous layer takes on white when it stands dry in the state the yellow light-transmitting member is set on the container at its opening and the drawable member C is placed on the light-transmitting member, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are perceivable with the eyes as orange-colored images having brilliance which have been formed by color mixture of the yellow the light-transmitting member has had and the pink the drawable member C has had.
The drawable member D is mounted and like operation is repeated, thus images are perceivable with the eyes as green images having brilliance which have been formed by color mixture of the yellow the light-transmitting member has had and the blue the drawable member D has had.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, thus the images are perceivable with the eyes as written images having brilliance in blue, pink, orange or green conjointly with the colors the light-transmitting members have.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 7 (see FIG. 4)

To the surface of a light-transmitting support 3 made of white polyester taffeta cloth having been subjected to water-repellent treatment (fiber weight of the support: 80 g/m²; 40 cm × 40 cm in size), a pink screen printing ink prepared by uniformly mixing, with stirring, 15 parts of a pink color pigment, 50 parts of acrylate emulsion, 3 parts of a thickening agent for water base ink, 0.5 part of a leveling agent, 0.3 part of an anti-foaming agent and 5 parts of a blocked isocyanate type cross-linking agent was applied by solid printing through a 120-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to provide a non-metachromatic layer 8.
Then, on the non-metachromatic layer 8, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process fine silica powder (trade name: NIPSIL E-220; available from Nippon Silica Industrial Co., Ltd.), 45 parts of urethane emulsion (trade name: HYDRAN AP-10; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of a blocked isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer 4 to obtain a drawable member 2 capable of changing in colors from white to pink upon application of water.
Then, a box-shaped hollow container 6 made of colorless transparent acrylic resin was coated on its sides with a red coating material to provide a colored layer 9. Thereafter, this container was set holding in the interior thereof a fluorescent lamp as a light source 5, a cylindrical colored filter 10 having colorless, blue and yellow transparent films which makes the light source change in colors, a reflecting material which makes light reflect therefrom, a lens which diffuses light and a dry cell as a power source to obtain a drawing toy 1 on the top surface of which the drawable member can be placed.
The light source and the power source stand electrically connected with each other.
This drawing toy is such that the porous layer of the drawable member placed thereon takes on white when it stands dry, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material and the lens, thus the images are perceivable with the eyes as images having brilliance.
The images change selectively in colors as the colored filter is turned, thus images having brilliance are perceivable with the eyes in pink, in purple having been formed by color mixture of pink and blue, or in orange color having been formed by color mixture of pink and yellow.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, thus the images are perceivable with the eyes as written images having brilliance in pink, purple or orange.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 8

To the surface of a sheetlike light-transmitting support (thickness: 2 mm; 50 cm × 50 cm in size) made of transparent soft-polyvinyl chloride resin, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 50 parts of urethane emulsion (trade name: HYDRAN AP-20; available from Dainippon Ink & Chemicals, Inc.; solid content: 30%), 40 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 1 part of an isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 50°C for 60 minutes to form a porous layer to obtain a drawable member.
Then, a hollow container made of black polypropylene resin and having an opening was set holding therein white, blue, red and yellow light-emitting diodes as light sources, a lens which diffuses light and a dry cell as a power source, where four light-transmitting members were each set detachably mountable to the container at its opening, to obtain a drawing toy.
The light-transmitting members are colorless, blue, red and green platelike members made of transparent polycarbonate resin for each.
The light source and the power source stand electrically connected with each other.
This drawing toy is such that the porous layer of the drawable member placed thereon takes on white when it stands dry, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the lens, thus the images are perceivable with the eyes as images having brilliance.
As the images, images having brilliance in various colors are perceivable with the eyes by selecting the light sources and selecting the light-transmitting members.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such a drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, whereupon written images having brilliance in various colors become perceivable with the eyes.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 9

To the surface of a sheetlike light-transmitting support (thickness: 100 µm; 30 cm × 40 cm in size) made of transparent polyethylene terephthalate resin, a fluorescent pink screen printing ink prepared by uniformly mixing, with stirring, 15 parts of a fluorescent pink color pigment, 50 parts of acrylate emulsion, 3 parts of a thickening agent for water base ink, 0.5 part of a leveling agent, 0.3 part of an anti-foaming agent and 5 parts of a blocked isocyanate type cross-linking agent was applied by solid printing through a 150-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to provide a non-metachromatic layer.
Then, on the non-metachromatic layer, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 30 parts of urethane emulsion (trade name: HYDRAN HW-930; available from Dainippon Ink & Chemicals, Inc.; solid content: 50%), 50 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of a blocked isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer to obtain a drawable member.
Then, a hollow container made of black polypropylene resin and having an opening was set holding therein a fluorescent lamp and a black light as light sources, a reflecting material which makes light reflect therefrom and a dry cell as a power source, where two light-transmitting members were each set detachably mountable to the container at its opening, to obtain a drawing toy.
The light-transmitting members are colorless and blue platelike members made of transparent polycarbonate resin for each.
The light source and the power source electric cord stand electrically connected with each other.
This drawing toy is such that, the fluorescent lamp is turned on and thereafter the drawable member is placed setting the colorless light-transmitting member together, where the porous layer takes on white when it stands dry, and it turns transparent when water is applied to the porous layer, whereupon images are formed. The images formed are irradiated with light from the light source on the back surface efficiently in virtue of the reflecting material, thus the images are perceivable with the eyes as fluorescent pink images having brilliance.
In this state, the black light is turned on, thus images having brilliance in pink which is more richly fluorescent are perceivable with the eyes.
The above images, where the blue light-transmitting member is set and like operation is repeated, turn to fluorescent purple images having brilliance, and images having brilliance in purple which is more richly fluorescent are perceivable with the eyes.
Further, as the porous layer becomes dry, the images become not perceivable with the eyes. The water is again applied to the porous layer, whereupon the images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.
The drawing toy 1 and as a water-applying implement a pen 17 having at its end a fibrous pen point 13 and so made that water was holdable in its barrel cylinder 15 were combined to obtain such an drawing toy set 19 as what is shown in FIG. 6.
This drawing toy set is such that the pen holding the water therein is used to write down images on the porous layer, whereupon written images having brilliance in fluorescent pink or fluorescent purple become perceivable with the eyes.
Further, as the porous layer becomes dry, the written images become not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the written images having brilliance become perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 10 (see FIG. 5)

To the surface of a sheetlike light-transmitting support 3 (thickness: 100 µm; 30 cm × 40 cm in size) made of colorless transparent polyethylene terephthalate resin, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 30 parts of urethane emulsion (trade name: HYDRAN HW-930; available from Dainippon Ink & Chemicals, Inc.; solid content: 50%), 50 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of a blocked isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer 4 to obtain a drawable member 2.
Then, a hollow container 6 made of white polypropylene resin and having an opening was set holding therein a fluorescent lamp as a light source 5, a reflecting material 11 which makes light reflect therefrom and a dry cell as a power source, where the container was provided with a light-transmitting member 7 at its opening and a frame with which the drawable member was to be fastened onto the light-transmitting member 7, to obtain a drawing toy 1.
This drawing toy, as a water-applying implement a pen having at its end a fibrous pen point and so made that water was holdable in its barrel cylinder, and a light-transmitting pattern sheet 12 printed with a flower pattern were combined to obtain a drawing toy set.
The flower pattern of the light-transmitting pattern sheet is a pattern of flowers the outlines of which have been drawn in black and the flower portions in the outlines of which have been colored in pink with a light-transmitting ink.
This drawing toy set is such that the light-transmitting pattern sheet 12 and the drawable member 2 are placed on the light-transmitting member 7 in this order and then fastened with the frame and thereafter the light source is turned on, thus the pattern of flowers is perceivable with the eyes trough the drawable member.
The pen holding the water therein is used to write down images on the porous layer at its part positioned on the flower pattern portion, whereupon a pattern of clear pink flowers outlined in black becomes perceivable with the eyes.
Further, as the porous layer becomes dry, the pink flower pattern becomes not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the pink flower pattern becomes perceivable with the eyes.
Such phase changes were repeatedly achievable.

Example 11

To the surface of a sheetlike light-transmitting support (thickness: 100 µm; 30 cm × 40 cm in size) made of colorless transparent polyethylene terephthalate resin, a white screen printing ink prepared by uniformly mixing, with stirring, 15 parts of wet-process silicic acid (trade name: NIPSIL E-200; available from Nippon Silica Industrial Co., Ltd.), 30 parts of urethane emulsion (trade name: HYDRAN HW-930; available from Dainippon Ink & Chemicals, Inc.; solid content: 50%), 50 parts of water, 0.5 part of a silicone type anti-foaming agent, 3 parts of a thickening agent for water base ink, 1 part of ethylene glycol and 3 parts of a blocked isocyanate type cross-linking agent was applied by solid printing over the whole surface through a 100-mesh screen printing plate, followed by drying and hardening at 130°C for 5 minutes to form a porous layer to obtain an drawable member.
Then, a hollow container made of white polypropylene resin and having an opening was set holding therein a fluorescent lamp as a light source, a reflecting material which makes light reflect therefrom and a dry cell as a power source, where the container was provided with a light-transmitting member at its opening and a frame with which the drawable member was to be fastened onto the light-transmitting member 7, to obtain a drawing toy.
This drawing toy, as a water-applying implement a pen having at its end a fibrous pen point and so made that water was holdable in its barrel cylinder, a light-transmitting sheet and a writing implement (a marker for a writing board) with which an erasable written image is formed on the light-transmitting sheet were combined to obtain a drawing toy set.
This drawing toy set is such that outline images of stars are formed on the light-transmitting sheet by using the marker for a writing board, and thereafter the light-transmitting sheet and the drawable member are placed on the light-transmitting member in this order and then fastened with the frame, where the light source is turned on, thus the outline images of stars are perceivable with the eyes trough the drawable member.
The pen holding the water therein is used to write down images on the porous layer at its part positioned inside the outlines of the outline images of stars, whereupon a pattern of stars having brilliance becomes perceivable with the eyes.
Next, the light-transmitting sheet is removed, then the outline images of stars are rubbed with a cloth, and heart-shaped outline images are formed again by using the marker for a writing board. Thereafter, the light-transmitting sheet and the drawable member are placed on the light-transmitting member in this order and then fastened with the frame, where the light source is turned on, thus the heart-shaped outline images are perceivable with the eyes trough the drawable member.
The pen holding the water therein is used to write down images on the porous layer at its part positioned inside the outlines of the heart-shaped outline images, whereupon a pattern of heart shapes having brilliance becomes perceivable with the eyes.
Further, as the porous layer becomes dry, the heart shape pattern having brilliance becomes not perceivable with the eyes. The water is again applied to the porous layer by using the pen, whereupon the heart shape pattern becomes perceivable with the eyes.
Such phase changes were repeatedly achievable.

Claims

A drawing toy which comprises a drawable member comprising a light-transmitting support and provided on the surface thereof a porous layer in which a low refractive index pigment has been made dispersedly fixed to a binder resin and which comes different in transparency between a liquid-absorbed condition and a liquid-non-absorbed condition, and a light source which irradiates the back surface of the drawable member with light.
The drawing toy according to claim 1, wherein at least one of the light-transmitting support and the porous layer contains a coloring agent.
The drawing toy according to claim 1, wherein a non-color-changeable layer containing a coloring agent is provided between the light-transmitting support and the porous layer and/or on the back surface of the light-transmitting support.
The drawing toy according to claim 2 or 3, wherein the coloring agent is selected from the group consisting of a fluorescent pigment, a fluorescent dye, a fluorescent brightening pigment and a fluorescent brightening dye.
The drawing toy according to claim 1, wherein the light-transmitting support holds the light source therein.
The drawing toy according to claim 1, which comprises a container which holds the light source therein, and the container has, at its part where the drawable member is disposed, a light-transmitting part which transmits light from the light source.
The drawing toy according to claim 1, which comprises a container which holds the light source therein, and the container is provided with an opening through which the drawable member is irradiated on the back surface thereof with the light from the light source, where the drawable member is so constructed as to be detachably mountable to the opening.
The drawing toy according to claim 7, wherein the container is provided with a light-transmitting member at the opening, and the drawable member is disposed on the light-transmitting member.
The drawing toy according to claim 8, wherein the light-transmitting member stands colored.
The drawing toy according to claim 1, which comprises a container which holds the light source therein, and the container is provided with an opening through which the drawable member is irradiated on the back surface thereof with the light from the light source, where the drawable member is fastened to the container at the opening thereof.
The drawing toy according to claim 1, which comprises a plurality of light sources different in colors.
The drawing toy according to claim 1, which comprises a colored filter which changes the color of the light source.
The drawing toy according to claim 1, which comprises a light-transmitting pattern sheet provided between the light source and the drawable member.
The drawing toy according to claim 1, which comprises a light-transmitting sheet provided between the light source and the drawable member and a writing implement with which an erasable written image is formed on the light-transmitting sheet.
The drawing toy according to claim 6 or 7, wherein the container holds therein an optical member which reflects and/or refracts the light from the light source.
The drawing toy according to claim 1, wherein the light from the light source is light having at least one of visible light and ultraviolet light.
A drawing toy set which comprises the drawing toy according to claim 1 and a water-applying implement.
A drawing toy set which comprises the drawing toy according to any one of claims 6 to 8 and a water-applying implement.