Colored paper

Abstract

To provide a new technology capable of writing characters and pictures by using water, where the written characters and picture will not be faded.SOLUTION: The coloring paper includes a paper an ink regions, the ink region being arranged scattered on a paper face of the paper and formed from inks which melt by reaction with water, and non-ink regions arranged in regions other than ink regions and developing colors by passing a paint brush containing water.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to color-developing paper. [Background technology]

[0002] Water brush paper is known as specially treated paper whose surface is treated so that it can be used repeatedly for calligraphy (see, for example, Patent Document 1). There are also color-changing coloring books and color-changing coloring sets that use them that can be used repeatedly, are not contaminated by writing implements used for coloring, and are highly convenient (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 3149738 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-326870 Summary of the Invention [Problem to be solved by the invention]

[0004] With water brush paper, you can write letters using only water, without using ink. Also, with color-changing coloring books, the applicator used for coloring is water. This means there is no pollution, and it is convenient and resource-saving. However, the letters written on water brush paper and the colors in color-changing coloring books will disappear after a certain period of time.

[0005] In view of the above problems, an object of the present invention is to provide a new paper technology on which letters and pictures can be written with water and on which the written letters and pictures do not disappear. [Means for solving the problem]

[0006] In order to solve the above problem, in the present invention, ink that reacts with water and dissolves is scattered on the surface of the paper.

[0007] In detail, the present invention is a color-developing paper comprising paper, ink areas scattered on the surface of the paper, the ink areas being made of ink that reacts with water and dissolves, and non-ink areas arranged in areas other than the ink areas and that develop color when a brush containing water passes over them.

[0008] In the color-developing paper of the present invention, the ink in the ink area reacts with water and dissolves, causing the non-ink area where a water-containing writing implement passes over to develop color. This allows for free writing of letters and pictures on the color-developing paper with water. Furthermore, because the ink develops color by dissolving, the ink will not fade. Furthermore, while ink and ink juice are difficult to remove from clothing, the ink on the color-developing paper of the present invention can be removed more easily than ink and ink juice.

[0009] Ink that dissolves in water is placed on the paper. The paper may be any type that can fix the ink to the surface of the paper. The type of paper can be changed depending on the use of the color-developing paper. Examples of ink include water-soluble ink. The color, shape, size, and spacing of the ink areas can be changed as appropriate. The size and spacing of the non-ink areas can be changed as appropriate depending on the ink areas. The writing implement can be any type that can write letters or pictures on the color-developing paper with water. The writing implement can be a writing brush, a pen-shaped brush that contains water, or a pen-like brush that contains water.

[0010] Here, the ink areas and non-ink areas may form a pattern. Examples of patterns include, but are not limited to, a dotted pattern and a grid pattern. The pattern can be adjusted by changing the type and color of paper, the color of the ink areas, the shape of the ink areas, the size of the ink areas, the spacing between the ink areas, the color of the non-ink areas, the shape of the non-ink areas, and, when there are many non-ink areas, the spacing between the non-ink areas, to adjust the appearance of the color-developing paper, such as its hue. The hue and shade of the developed color can also be adjusted. For example, by making the ink areas smaller (making the non-ink areas larger) and increasing the spacing between the ink areas (making the non-ink areas larger), the ink areas can be made less noticeable. For example, even when using black ink, the color-developing paper will give the impression of a light gray. On the other hand, by making the ink areas larger (making the non-ink areas smaller) and decreasing the spacing between the ink areas (making the non-ink areas smaller), the developed color can be made darker compared to when the ink areas are small and the spacing between the ink areas is wide.

[0011] The pattern may also have a contour with a predetermined shape. The colored paper of the present invention allows for free writing of letters and pictures with water, but by forming the contour of the pattern into a predetermined shape, it is possible to use the contour as a guide for writing letters and pictures. For example, by forming the contour into letters, the colored paper of the present invention can be used as paper with a model for calligraphy or writing (e.g., learning material for practicing writing). Furthermore, for example, by forming the contour into a picture, the present invention can be used as a coloring book.

[0012] The pattern may also be different depending on the position on the paper. By making the pattern different depending on the position on the paper, it is possible to vary the color tone and shading of the color produced simply by writing with water in the same way. The pattern can be made different by changing, for example, the color of the ink area, the shape of the ink area, the size of the ink area, the spacing between the ink areas, the color of the non-ink area, the shape of the non-ink area, and when there are many non-ink areas, the spacing between the non-ink areas, etc., depending on the position on the paper.

[0013] The ink in the ink region may also contain a colorant that adds color to the ink and an additive that promotes the reaction between the ink and water. The colorant allows the color to be adjusted. The additive promotes the reaction between the ink and water, in other words, makes the ink more soluble in water. The additive also prevents the ink from bleeding during color development.

[0014] The ink in the ink region may further contain a coloring agent that reacts with water to change color. The coloring agent can change the color of the colorant, in other words, the color that is developed. For example, even if the colorant is white, by including phenolphthalein as a coloring agent, it can react with clear water to develop a purple color. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a new paper technology on which letters and pictures can be written with water and the written letters and pictures do not disappear. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 shows a plan view of the color developing paper (dot-shaped) according to the first embodiment. [Figure 2] FIG. 2 shows an enlarged view of the cross section AA of FIG. [Figure 3] FIG. 3 shows a plan view of the color developing paper (grid-shaped) according to the first embodiment. [Figure 4] FIG. 4 shows the color-developing paper according to the first embodiment in a colored state. [Figure 5] FIG. 5 shows a plan view of the color-developing paper according to the second embodiment. [Figure 6] FIG. 6 shows a plan view of the color-developing paper according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, an embodiment of the present invention will be described with reference to the drawings. The following description is an example, and the present invention is not limited to the following content.

[0018] First Embodiment <Composition of color-developing paper> FIG. 1 shows a plan view of color-developing paper (dot-shaped) according to the first embodiment. FIG. 2 shows an enlarged view of the AA cross section of FIG. 1. The color-developing paper 1 according to the first embodiment comprises paper 2, an ink region 3, and a non-ink region 4. The paper 2 is made of rectangular wood-free paper. The type, color, shape, size, etc. of the paper 2 can be changed depending on the application. Examples of the paper 2 include western paper, paperboard, and Japanese paper. Western paper includes newspaper roll paper, printing and communication paper including wood-free paper, packaging paper, sanitary paper, and miscellaneous paper including calligraphy paper. Paperboard includes cardboard, paper container board, and miscellaneous paperboard. Japanese paper includes various handmade papers made using traditional Japanese methods and machine-made papers. For example, by using calligraphy paper or Japanese paper as the paper 2, the color-developing paper 1 according to the first embodiment can be used as calligraphy paper.

[0019] The ink regions 3 are scattered across the surface of the paper 2 and are made of ink that dissolves in water. The non-ink regions 4 are located in areas other than the ink regions 3 and develop color when a brush 6 containing water passes over them. The ink regions 3 and non-ink regions 4 form a pattern. In the color-developing paper 1 according to the first embodiment, the ink regions 3 are made up of multiple circular dots, and the non-ink regions 4 are made up of areas other than the multiple circular dots, forming a dot pattern together with the non-ink regions 4. The appearance of the color-developing paper 1, for example, its hue, can be adjusted by changing the shape, size, and spacing of the dots in the ink regions 3. The hue and shade of the color can also be adjusted. For example, the ink regions 3 can be made less noticeable by making the dots smaller (making the non-ink regions 4 larger) and increasing the spacing between the dots (making the non-ink regions 4 larger). For example, when using white paper 1 and black ink, the color-developing paper will appear light gray. On the other hand, by making the dots larger (making the non-inked areas 4 smaller) and narrowing the spacing between the dots (making the non-inked areas 4 smaller), the color that is produced can be made darker compared to when the ink areas 3 are small and the spacing between the ink areas 3 is wide. For example, when using white paper 2 and black ink, the color-producing paper will give the impression of being dark gray, or of multiple black dots scattered on a white background.

[0020] The pattern is not limited to dots. It is sufficient that the ink regions 3 are scattered on the surface of the paper 2. The pattern may be a grid pattern, vertical stripes, horizontal stripes, diagonal lines, or other patterns. FIG. 3 shows a plan view of the color-developing paper (grid pattern) according to the first embodiment. As shown in FIG. 3, the pattern may be a grid pattern. The grid pattern is composed of multiple intersecting straight lines of ink regions 3, and the ink regions 3 and non-ink regions 4 form a grid pattern. The appearance of the color-developing paper 1 can be adjusted by changing the color of the ink regions 3, the shape of the ink regions 3, the size of the ink regions 3, the spacing between the ink regions 3, and so on. The hue and shade of the developed color can also be adjusted. The pattern is created by fixing the ink that makes up the ink regions 3 on the surface of the paper 2. Fixing the ink can be achieved using existing printing methods. Examples of existing printing methods include offset printing, gravure printing, and screen printing.

[0021] The ink constituting the ink area 3 is a water-soluble ink containing a pigment as a colorant that colors the ink and silicone oil as an additive that promotes the reaction between the ink and water. The additive promotes the reaction between the ink and water, in other words, makes the ink more soluble in water. The additive also suppresses ink bleeding during color development. For example, watercolor paint manufactured by Rowney (product name: Artists, color: Lamp Black (035)) can be used as the ink. Alternatively, watercolor paint manufactured by Sakura Palace (product name: Sakura Matte Water-Based, color: Black (49)) can be used as the ink. The ink is not limited to the above. Any water-soluble ink that dissolves in water can be used, and the type and color can be changed appropriately depending on the application. A dye can also be used as a colorant. When a dye is used, coated paper is preferably used as the paper 2. The silicone oil can be either hydrophobic or hydrophilic. When using hydrophobic silicone oil to facilitate mixing of the water-soluble ink with the silicone oil, the ink may further contain a surfactant in addition to the pigment and silicone oil. The water may be clear or colored.

[0022] <How to use color development paper> Letters and pictures can be freely written on the coloring paper 1 using a writing implement 6 containing water. Here, FIG. 4 shows the coloring paper according to the first embodiment in a colored state. In FIG. 4, the character "kotobuki" (longevity) is written on the coloring paper 1. When the writing implement 6 containing water comes into contact with the coloring paper 1, the ink in the ink region 3 reacts with the water and dissolves, and some of the dissolved ink spreads to the non-ink region 4 through which the writing implement 6 has passed, causing the non-ink region 4 to develop the color of the ink that makes up the ink region 3. Note that in the first embodiment, a writing brush is used as the writing implement 6, but the writing implement 6 is not limited to this. The writing implement 6 may be any implement that can write letters and pictures on the coloring paper 1 with water. In addition to a writing brush, the writing implement 6 may be a pen-type brush containing water or a pen-like implement containing water.

[0023] <Effects> According to the color-developing paper 1 of the first embodiment, the ink in the ink region 3 reacts with water and dissolves, causing the non-ink region 4, through which the water-containing writing implement 6 passes, to develop color. This allows for free writing of letters and pictures on the color-developing paper 1 with water. Furthermore, since the ink develops color by dissolving, the ink does not fade. Furthermore, while ink and India ink are difficult to remove from clothing, the ink in the color-developing paper 1 of the first embodiment is water-soluble and therefore easier to remove. Furthermore, the color developed can be adjusted by changing the colorant in the ink. Furthermore, additives promote the reaction between the ink and water, in other words, make the ink more soluble in water. Furthermore, additives can suppress ink bleeding during color development.

[0024] Second Embodiment FIG. 5 shows a plan view of coloring paper according to the second embodiment. Note that the same components as those in the first embodiment are given the same reference numerals and will not be described further. In the coloring paper 1 according to the second embodiment, the outline of the dotted pattern 5 is formed in the shape of a character (in FIG. 5, "kotobuki") as a predetermined shape. By forming the outline of the dotted pattern into a character, the character can be written using the outline as a guide. As a result, the coloring paper 1 can be used as paper with a calligraphy model (for example, a learning material for practicing characters).

[0025] The pattern may be a grid pattern, vertical stripes, horizontal stripes, diagonal lines, or other patterns. The predetermined shape may be changed depending on the application, such as letters, numbers, symbols, or pictures. The outline of the pattern 5 can be formed by the boundary between the ink area 3 and the non-ink area 4, but it may also be formed by using a water-insoluble ink separate from the ink that makes up the ink area 3 and fixing the water-insoluble ink on the paper 2.

[0026] Third Embodiment FIG. 6 shows a plan view of color-developing paper according to a third embodiment. Components similar to those in the first and second embodiments are designated by the same reference numerals and will not be described further. In the color-developing paper 1 according to the third embodiment, the outline of the pattern 5 is formed in the shape of a house. The outline of the pattern 5 is formed by fixing a water-insoluble ink, separate from the water-soluble ink constituting the ink region 3, to the paper 2. Different patterns are formed depending on the position on the paper 2. More specifically, the pattern 5 is composed of multiple patterns, and the ink in the ink region 3 constituting each pattern is also composed of different colors. The main body of the house is formed by a dotted pattern 31 made of white ink, the roof of the house by a diagonal line pattern 32 made of red ink, the windows of the house by a fine dotted pattern 33 made of light blue ink, and the trees by a grid-like pattern 34 made of green ink. The patterns and ink colors are merely examples and are not limited to those described above.

[0027] By forming the outline of the pattern 5 into the shape of a house, the coloring paper 1 can be used as a coloring book. Also, by making the pattern different depending on the position on the paper 2, it is possible to vary the color tone and shade by simply writing with water in the same way.

[0028] <Other embodiments> The ink constituting the ink region 3 may further contain a coloring agent that reacts with water to change color. An example of a coloring agent is phenolphthalein. The coloring agent can change the color of the colorant, in other words, the color that is developed. For example, even if the colorant is white, by including phenolphthalein as a coloring agent, it can react with clear water to change color to purple.

[0029] Although the embodiments of the present invention have been described above, the color-developing paper according to the present invention is not limited to these, and can be combined as much as possible. Furthermore, the color-developing paper according to the present invention can be modified within the scope of the gist of the present invention. [Explanation of symbols]

[0030] 1. Colored paper 2. Paper 3. Ink area 4. Non-ink area 5. Pattern 6. Brush implements

Claims

1. Paper and ink areas dispersed and fixed on the surface of the paper, the ink areas being made of ink that reacts with water and dissolves; a non-inked area that is disposed in an area other than the ink area, and that develops color when the ink in the ink area reacts with water to dissolve and a portion of the dissolved ink spreads; Colored paper with ink and non-ink areas that form a pattern across the entire surface.

2. A color-developing paper as described in claim 1, wherein the ink area is composed of multiple dots fixed at equal intervals.

3. The color-developing paper described in claim 1, wherein the ink areas and non-ink areas form a grid pattern.

4. 2. The color-developing paper according to claim 1, wherein the ink in the ink region contains a colorant that gives color to the ink and an additive that promotes the reaction between the ink and water.

Images