JPH0858230A - Printing system - Google Patents

Abstract

PURPOSE: To provide attractive education and amusement inclusive of a hue by providing a color forming region changed from a colorless state to a colored state by applying a color forming aid. CONSTITUTION: Printed matter 1 printed by using an ink containing a color former changed from a colorless state to a colored state by a color forming aid 5 and the color forming aid 5 are provided. The color former is an electron donating color forming compd. selected from 2-(4-dodecyloxy-3-methoxystyryl) quinoline, 3-cyclohexylamino-6-chlorrofluorane, 3-diethylaminobenzo [a ]fluorane, 3-(4-dimethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindol-3-yl)--4-a zaphthallde, 3,3-bis [4-diethylamaino-2-ethoxylphenyl ]-4-azaphthalide and 3- cyclohexylmethylamino-6-methyl-7- -anilinofluorane. The color forming aid is an electron acceptive coupling compd. selected from zinc salicylate an bisphenol A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing system in which a coloring area printed on a printed matter can be repeatedly colored and erased, and at the same time, attractive education and entertainment including colors can be performed.

[0002]

2. Description of the Related Art It is widely known that, for example, PH indicators such as phenolphthalein change from substantially invisible colorless to visible colored by the action of acids and alkalis, and in recent years, such PH indicators have been known. There is proposed a printed matter in which a coloring area such as a hidden character or a hidden picture is printed by using as a coloring agent. In addition to the effect of concealing the coloring area, this one can give the user a high degree of interest and amusement, such as a change in the appearance when the coloring area changes from colorless to colored, and an impression of the printed content due to unexpectedness. It is possible to utilize it in the fields of picture books, coloring pages, reference books, and problem collections.

[0003]

However, such PH indicators have various colors, but since they have different unique coloring PH areas and decoloring PH areas, a large number of PH indicators are present. It is extremely difficult to color and decolor the PH indicator at the same time by using one color-forming auxiliary. Therefore, in the printing system using these PH indicators, it is difficult to repeat the coloring / erasing of a plurality of colors while producing a monotonous appearance with few kinds of colors to be colored.

Therefore, in view of such a situation, the inventor of the present invention has conducted extensive research on various dyes, pigments and the like. As a result, among the electron-donating color-developing compounds known as dyes, certain compounds react with a specific electron-accepting color-developing compound to develop from colorless to their own unique color; When zinc salicylate and bisphenol A are used as the pigment, the effect of the color developing compound is lost due to the adhesion of water after coloring, the coloring state is returned to the colorless state, and this colorless / coloring change can be repeated. I found that.

That is, the present invention is based on the use of a printed matter printed with an ink containing a specific color-forming compound and a color-developing compound containing zinc salicylate and bisphenol A. It is an object of the present invention to provide a novel printing system that enables formation, enhances appearance and unexpectedness and amusement, and enables repeated coloring / decoloring.

[0006]

In order to achieve the above object, the printing system of the present invention comprises a color-forming aid containing an electron-accepting color-developing compound selected from zinc salicylate and bisphenol A; A substantially invisible colorless to visible colored material having a coloring area printed on the surface with an ink containing a coloring agent.
The color former is 2- (4-dodecyloxy-3-methoxystyryl) quinoline (yellow), 3-cyclohexylamino-6-chloro-fluorane (orange), 3-diethylaminobenzo [a] -fluorane (red). , 3-
(4-Dimethylamino-2-ethoxyphenyl) -3-
(1-Ethyl-2-methylindol-3-yl) -4
From azaphthalide (blue), 3,3-bis [4-diethylamino-2-ethoxyphenyl] -4-azaphthalide (blue), 3-cyclohexylmethylamino-6-methyl-7-anilinofluorane (black) And one or more electron-donating color-forming compounds selected from Group A, wherein the color-forming region is repeatedly colored from the colorless to colored by the application of the color-forming auxiliary and is repeatedly colored to colorless by the adhesion of water. It is characterized by erasing.

[0007]

The electron-donating color-forming compound selected from the group A is changed from colorless to a color unique to each color-forming compound by making a molecular contact with the electron-accepting color-developing compound selected from zinc salicylate and bisphenol A. Develops color. Since these color changes are not based on the conventional PH changes, it is possible to simultaneously develop various coloring compounds into unique colors by using one color auxiliary, and it is possible to print a rich picture or the like. . The colors after development are shown in parentheses. Group A includes the three primary colors, and these colors can be mixed, making it possible to create complex and profound colors such as photographs and paintings. Printing is also possible.

Further, this product can be instantly decolored only by adhesion of water after coloring, and when this coloring / decoloring can be repeated, it can be used for coloring pictures, reference books, problem collections, etc. , They can be used repeatedly, and their commercial value can be greatly enhanced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, a printed matter 1 has a coloring area Y such as a hidden picture printed on a paper surface 2 using an ink 3 containing a coloring agent that changes from colorless to colored, and the coloring area Y is a specific coloring area. By applying a color-forming aid 5 composed of an electron-accepting color-developing compound, it is expressed from colorless to colored.

In this case, the ink 3 is an anhydrous liquid in this example, which is formed by kneading a color former with a vehicle, and the colorant is 2- (4-dodecyloxy-3-).
Methoxystyryl) quinoline, 3-cyclohexylamino-6-chloro-fluorane, 3-diethylaminobenzo [a] -fluorane, 3- (4-dimethylamino-2)
-Ethoxyphenyl) -3- (1-ethyl-2-methylindol-3-yl) -4-azaphthalide, 3,3
-Bis [4-diethylamino-2-ethoxyphenyl]
One or more electron-donating color compounds selected from the group A consisting of -4-azaphthalide and 3-cyclohexylmethylamino-6-methyl-7-anilinofluorane are used. As the vehicle, for example, a mixture of styrene resin, acrylic resin and the like with a solvent such as dioctyl phthalate and dimethyl phthalate can be used, and a colorless ink can be obtained by stirring the vehicle and the color former for about 20 minutes. Can be obtained. The components of these vehicles and their blending ratios can be changed depending on the type of printing. For example, in the case of permeation drying such as high-speed printing, it is preferable to eliminate the resin material as the vehicle to reduce the viscosity. Further, in the color-forming compounds of group A, the colors can be mixed at the time of color development by combining them, and printing with a complicated and heavy color tone is possible.

An electron-accepting color-developing compound selected from zinc salicylate and bisphenol A is used as the color-forming auxiliary 5 for developing the color of the ink. As a result, the coloring aid 5 reacts with the coloring agent to develop the color of the ink 3 and loses its effect due to the adhesion of water.
It is possible to instantly return from the colored state to the colorless state. Further, while this decolorization to colorless is maintained even after drying of water, the coloring / decoloring can be repeated by changing the coloring by further application of zinc salicylate or the like.

The color-developing aid 5 can be an anhydrous liquid material in which the electron-accepting color developing compound is dispersed in a solvent of dimethyl phthalate and ethanol. The auxiliary agent is applied on the paper 2 using an application tool 6 such as a brush, a pen, or a spray.

The electron-accepting color developing compound may be kneaded with carnauba wax, paraffin, wood wax, hardened oil or the like to form a so-called solid crayon, at which time the crayon itself constitutes the applicator 6. When such a crayon is applied to the color-forming aid 5, it repels water, which hinders the decoloring action of water.
Has a non-uniform thickness and is coated on the paper surface 2, so irregularities resembling brush lines, spatula marks, etc. in oil paintings are formed by the individual touch of the operator, and in combination with the complexity of the hue, etc. 1 can be expressed in a style such as a painting. It should be noted that as the color-forming aid 5, an electron-accepting color-developing compound can also be formed in the form of an oil paint in which highly viscous liquid oil, alcohol, etc. are mixed. Can be expressed in the style of.

(Concrete Example) A color-forming compound selected from the group A, styrene / acrylic resin, dioctyl phthalate, and dimethyl phthalate are mixed in about 2 by using a stirrer.
A colorless ink was formed by stirring for 0 minutes, and this was used to print pictures, characters and the like with a letterpress printing machine. Moreover, about 20 parts of zinc salicylate, dimethyl phthalate and ethanol are added.
After stirring for a minute, a liquid color-forming aid was obtained. Then, by applying a color-forming aid to the printed color-forming region, the region is colored in color and can be rapidly erased by the adhesion of water. It was confirmed that the cycle of (color)-(drying)-(coloring with a color-forming aid) can be repeated.

[0015]

As described above, since the printing system of the present invention is configured as described above, it is possible to form colorful and colorful hidden pictures and the like, and it is possible to enhance the appearance and improve the unexpectedness and entertainment.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a chemical formula of 2- (4-dodecyloxy-3-methoxystyryl) quinoline.

FIG. 3 is the chemical formula for 3-cyclohexylamino-6-chloro-fluorane.

FIG. 4 is a chemical formula of 3-diethylaminobenzo [a] -fluorane.

FIG. 5 3- (4-Dimethylamino-2-ethoxyphenyl) -3- (1-ethyl-2-methylindole-3
-Yl) -4- is the chemical formula of azaphthalide.

FIG. 6 is the chemical formula of 3,3-bis [4-diethylamino-2-ethoxyphenyl] -4-azaphthalide.

FIG. 7 is a chemical formula of 3-cyclohexylmethylamino-6-methyl-7-anilinofluorane.

[Explanation of symbols]

 Y coloring area

Claims (1)

[Claims] 1. An ink comprising a color-forming aid containing an electron-accepting color-developing compound selected from zinc salicylate and bisphenol A, and a color-forming agent which develops from a substantially invisible colorless to a visible color by the color-forming aid. And a printed matter having a coloring area printed on the surface thereof, wherein the coloring agent is
2- (4-dodecyloxy-3-methoxystyryl) quinoline, 3-cyclohexylamino-6-chloro-fluorane, 3-diethylaminobenzo [a] -fluorane, 3- (4-dimethylamino-2-ethoxyphenyl)- 3- (1-Ethyl-2-methylindole-3-
Yl) -4-azaphthalide, 3,3-bis [4-diethylamino-2-ethoxyphenyl] -4-azaphthalide, 3-cyclohexylmethylamino-6-methyl-7
-Containing one or more electron-donating color-forming compounds selected from the group A consisting of anilinofluorane,
A printing system, wherein the color forming region is repeatedly colored from the colorless to colored by applying the color forming auxiliary and is repeatedly erased from the colored to colorless by adhesion of water.