KR920001904B1 - Printing material - Google Patents

Abstract

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Description

Printing material

1A is a plan view showing a part of the contents of a printing material according to the present invention.

b is a plan view showing a state in which color is developed under the action of a colorant.

The present invention relates to a printing material which is printed by using a kind of ink containing a pH indicator as a component, wherein the ink (hereinafter referred to as `` coloring ink '') develops color under the action of a colorant, In addition, it can be repeated several times to develop and remove the color by removing the color in a short time.

As a printing material, it is made to be seen by applying a little liquid chemical to a printed material, such as a pen or a brush, on a printed part that is difficult to see. Japanese Utility Model Publication No. 52063 (1981) Several types, such as those described in the above, have been proposed, and moreover, various inventions relating to printing apparatuses and printing inks are also described in Japanese Patent Application No. 135720 (1976) and others thereof.

However, Japanese Utility Model Publication No. 52063 (1981), which is a conventionally known one, contains zinc chloride to prevent the color from changing over time and eventually disappears. After developing, the color remains as permanent as possible so that the color itself does not disappear in a short time after developing the color. Therefore, in a textbook or a problem book with an annotation line that is used as an answerable line printed in parallel with a problem line, the color of the line between the lines is a developable color. Even when printed, they are developed to show color and last for a long time. As a result, it is not possible to return the interline for several times to a blank state to repeatedly solve and learn the problem.

As a result, the above is printed on printed matter and book leading edges, or on margins or in separate volumes, using only the invisible ink to solve the problem multiple times without seeing the answer line. Other things are required. Therefore, it takes time and effort to compare problems and answers or mutual explanations, and the effect of learning is low.

Of course, when the color-printed part of the conventional one remains only one for a long time, for example, for about a few days, or about three days, the color of the ink is lost and the effect of the ink disappears under the influence of ultraviolet rays and oxidation. However, in order to increase the efficiency of the study by eliminating the color of the answer line in a short time, that is, in about 12 to 10 minutes as soon as the time required for the fading of the color is more than several days. It is impossible.

In addition, the prior art is difficult to use repeatedly because it was not originally designed to develop and repeatedly remove color.

It is an object of the present invention to provide a printing material capable of developing color and dissipating color under a slight coloring aid.

It is also an object of the present invention to provide a printing material which can be dissipated in a short time.

Furthermore, it is an object of the present invention to provide a printing material capable of performing repetition of coloring and fading.

The present invention is the whole or part of the main body printed by using a kind of colored ink which can fade the color within a relatively short time after developing the color by interacting with the colorant which becomes ineffective with the passage of time through volatilization or drying. It relates to a printing material produced by printing, and moreover, it is possible to repeatedly reproduce colors and to fade again in the short time each time the coloring aid is applied thereon. The above-mentioned colored ink has one or several mixtures of the following pH-indicator types as its components. ; γ-dinitrophenol, m-nitrophenol, o-nitrophenol, P-nitrophenol, cyanine, α-naphtholphthalein, phenolphthalein, cresolphthalein, thymolphthalein, ethyl-acetic acid, and bromophenol purple.

In other words, these pH-indicators have a pH range that becomes colorless and can be appropriately used depending on the color that can be represented. By the way, the printing material according to the present invention is prepared using a colored ink having a self-pH indicator as mentioned above or a plurality of mixtures thereof (hereinafter referred to as pH indicator) in itself. These pH-indicators have a pH range that develops color to high pH values (ie alkali side).

The coloring ink is usually adjusted in the colorless state mentioned above. It may be first printed to be colored and then dried to be colorless. It may also be prepared by dissolving the pH-indicator, for example, by the use of an alkaline solution or an alcoholic solvent, and mixing the ink colorant developer with the dissolved liquid. In this regard, moisturizers such as polyhydric alcohols, surfactants, oils, and various kinds of resins as necessary may be used as the ink developer. Furthermore, as the resin, cellac, guar gum, methyl cellulose, ethyl cellulose and the like that act as thickening agents can be used as the resin.

On the other hand, the colored ink can also be prepared by mixing the pH indicator with the ink developer based on a minute amount instead of dissolving the pH indicator by the solvent. Otherwise, the pH indicator may be mixed with the ink developer after the pH indicator is prepared to be properly absorbed into powder, inorganic acid, organic acid, or the like.

The coloring ink may be prepared so that the pH indicator contains an acid. These pH adjusting agents are used to maintain the pH indicator in the colorless pH range. It is also used repeatedly to keep the pH indicator within the colorless pH range even after repeated acting to prepare alkaline pigment preparations. It is used as a pH regulator such as tartaric acid or citric acid with efficiency persistence to the end.

A printed portion printed with that kind of colored ink develops color as the coloring aid acts on it and removes the color within a short time after coloring.

The aforementioned color aids contain an alkaline pH adjuster.

It can be used as a pH adjuster as much as the effect disappears over time after being painted on the printed area. This effect, which disappears over time, results from the volatilization of alkali present in it or the evaporation of a solvent (usually water) that dissolves the alkali. This loss effect occurs under normal conditions.

As an example of an alkaline substance which loses its effect due to volatility, the following may be exemplified. ; Ammonia, monoethanolamine, propylamines, 2-methylhexyl-oxypropylamine, 3-ethoxypropylamine, 3-methoxypropylamine, diisobutylamine, sec-butylamine, isopropylamines, ethanolamines, 2-ethylhexylamine, ethylleamine, etc.

The loss effect of the color aid due to the drying of the water is made possible by the use of the ion drying power dissipation. Such a property is a lot of pH regulators, but its concentration is below a certain value is usually applied to the loss of the ion drying power, it is difficult to completely dry the run-time. Diisopropanolamine, triisopropanolamine, diethanolamine and the like are given as examples of such kinds of alkaline materials, and water, alcohols, polyalcohols and the like are used as bodies for mixing these alkali materials. These alkaline pH adjusting agents can be used as mixtures of many of them.

The colorant applied to the printed portion allows the pH indicator to be contained in the coloring ink that develops the color, and the pH indicator removes the color in proportion to the loss effect of the colorant over time. Some nonvolatile acidic substances may be added to the coloring aids for the purpose of carrying out the fading. In addition, some volatile acidic substances which lose their effect later than the above-mentioned alkali pH adjusters may also be added thereto. However, neutral reactions with the alkaline pH regulators are inadequate due to the generation of precipitates.

The concentration and type of coloring aid are determined depending on the pH value at which the pH adjuster develops color.

The time required until fading after coloring is adapted so that the coloring can be lost within 1 minute for 12 hours or preferably in a short time of 2 to 15 minutes, especially when the teaching material is interleaved with tin. It is not desirable that the color lasts long until the next exercise.

The above-mentioned time required until fading after coloring can be adjusted depending on the content of the coloring ink in both of the coloring aids. The coloring ink can be controlled by the type of pH indicator, the type of surfactant, and the concentration or the concentration of oil contained in the ink developer and the concentration and type of the above-mentioned nonvolatile acidic substance. The colorant is adjusted according to the evaporation rate and the drying rate.

After the color is removed within a short time, the printed part develops a color again by acting on a coloring aid and loses the color within a short time. In such a way, coloring and fading can be repeated several times.

This repetition is also related to clarity in coloring. Clarity improves as the number of repetitions increases, but this clarity is determined by the control of the coloring ink, the control of the colorant and the choice of the quality of the paper used.

Due to the concentration of the colorant and the surfactant contained in the coloring ink, the higher the hydrophilicity, the higher the clarity of the color and the repetition frequency.

The clear coloration at the first stage mitigates the decomposition of the color after repeated action. As a result, intelligibility contributes to an increase in repetition frequency. The number of repetitions may be increased by adjusting the concentration and type of alkali pH adjusting agent in the coloring aid and the concentration of the aforementioned nonvolatile acidic substance.

In other words, by adding some non-volatile acidic substance to the ink developer, it is possible to complete the color faithfulness after the action of the coloring aid. In the main text, the completion of the color chamber means that the state of the color chamber cannot be detected by the naked eye under the fluorescent lamp of about 10W per 1.6 m2 inside the common room. Incidentally, the addition of non-volatile acidic substances contributes to shortening the time required for the completion of the color chamber and the fading after coloring, but the amount of addition is required to be perfectly combined so as not to impair repetitive operation.

As the paper used as the printed main body, its loss-of-coloring time, repeatability, clarity and certainty of its fading change depending on the quality of the paper (pH value, hygroscopicity). Therefore, it is necessary to select the optimum quality of paper corresponding to the coloring ink and the coloring aid.

As described above, the printing material according to the present invention can be found at all in the conventional printing material and in the characteristic of losing color within a short time of losing color within about 2 to 15 minutes after developing the color at 20 ° C. and 65%. Educational materials without proper characteristics and the printing material according to the present invention is manufactured so that all conditions such as the control of the coloring ink, the control of the colorant, the quality of the paper, etc. are reused at least 10 times on the basis of the selection. Can be.

By the way, the time required until the fading after development can be intentionally adjusted between 1 minute and 12 hours for various purposes.

Table 1 shows several examples of the combination of the pH indicator and the colorant used in the printing material according to the present invention. In addition, the pH value of the pH indicator that develops color, that is, the pH value when the coloring pH and color are lost, that is, the fading pH and the kind of color and the development of the color from the development of the color, are required until the color is lost by the addition of a color aid Approximations of time are shown. The coloring pH is the value of the concentration at which the printed portion is easily recognized or readable by the human eye under the action of the coloring aid. In this case, as mentioned above, the time required from developing to fading can be adjusted. That is, the coloring ink may contain 75 parts of modified alcohol, 15 parts of water, 10 parts of surfactant, 0-10 parts of tartaric acid and 2 parts of methyl cellulose as the composition of the colorant.

In this regard, the time values shown in the last column of Table 1 set out each case to be printed with an ink containing a colorant with an pH indicator of oirtuibs equivalent to the addition amounts listed in Table 1.

Examples of the apparatus for producing a colorant that acts on printing materials other than felt pens are, for example, pens such as an indicator for underlining an acrylic or polyester tip. In addition, it is preferable to add a coloring aid using a brush, rubber, sponge roller, etc. after filling the container with the container or the device mounted on the head having such a sponge or the like to apply a sprayer.

The printed body may be used in various forms for a variety of purposes, such as hard books such as books, newspapers, weekly papers, pamphlets, catalogs and packing boxes, and globes. The material of the printed body is spread throughout the paper, such as European-style machine paper (good, medium, rough) or Japanese-style hand-made paper. Good or medium paper is suitable to increase the number of times of repeated use, but it is preferable to select the kind of paper with the best profitability. It can be printed in the same way not only on paper but also on textiles, wood and the like. The printing can be produced by various printing techniques such as surface printing, gravure printing, copying, offset (including dry offset).

On the other hand, the printed body may be printed to be invisible on a portion parallel to or in front of the visible portion printed with black ink or the like. In addition, the problem setting intervals are printed invisibly as a part required for printing a problem or an annotation, but the composition intervals used as answerable solutions are invisibly printed using an ink containing a colorant according to the present invention.

Such invisible prints printed in this way become visible by developing a color by the coloring aid acting on it, and then it loses color in a short time due to the loss effect of the coloring aid over time. However, this invisible portion fades over and over again for a short time each time the coloring aid is applied repeatedly thereon.

As described above, the printing material according to the present invention develops color by the action of a colorant, and loses color within a short time after developing the color. Coloring and fading can be repeated as necessary. Therefore, when the printing material according to the present invention is utilized for various kinds of educational purposes, the useful commentary lines are printed as invisible printed portions in parallel with the visible problem lines, and these tin lines are the above-mentioned coloring preparations acting thereon. In the field of view so that the solution can be easily recognized. As a result, the study can be carried out without continuing the practice, and the color change from the coloring state to the fading state can gradually increase the interest of the learner and the learning can proceed without monotony. In addition, since the color of the solution is lost within a short time after the color develops, the practitioner can solve the problem repeatedly without turning his eyes to be able to answer. Moreover, there is no difficulty in referencing multiple dictionaries by developing distinctive colors at any time desired by various interpretations of foreign languages such as commentary lines, commentary sections, or English newspapers or foreign weekly magazines that clearly contain translated fire. It becomes possible to learn a language. As a result, the amount of interpretation increases rapidly, which has a great effect on studying language and contributes to improvement of language ability.

Example 1

The case where the printing material of the present invention is used for learning the related book shown in FIG. 1A is described. Problem setting lines are usually printed using inks containing black pigments and letters are printed on their sides, ie, comment lines for answers (b) are usually used with inks containing the colorant according to the invention in order to be less visible. Is printed on its right side. Printing was done with a driven printing machine and used good quality paper. The coloring ink was prepared to have the following configuration.

o-cresol phthalein, part 12

Surfactants belonging to higher alcohol groups (alkyl ether sulfate 40 parts

Sodium ester)

25 parts of surfactants (fatty acid alkanolamides) belonging to the fatty acid group

15 parts triethanol amine

Glue 0.5

Flaxseed oil part 5

On the other hand, the colorant was prepared in the following configuration.

1 part ammonia

Caustic Soda 0.2 part

100 parts water

Thickening agent (propane AA 62E (brand name of Mitsubishi Kasei)) 0.5 part

Surfactant (alkyl ester sodium sulfate sodium, fatty acid 9 parts

Alkanol amide, alpha olefin sodium sulfonate, alkylamine oxide

Each same amount mixed

A marker pen with a polyester tip with its head cut off with a knife was drawn in the solution with a center filter for the marker pen with polyester fibers wrapped in a polyurethane film. The letter or comment line (b) turns purple (purple). But the developed color disappears soon after 5 minutes. After drying, the aforementioned changes may be repeated twice and the present pen may be used up to 30 times repeatedly.

Example 2

Coloring aids were prepared in the following configurations.

15 parts of 3-ethoxypropylene amine

50 parts of modified alcohol (industrial ethyl alcohol)

35% 5% tartaric acid aqueous solution

The blue color appears as the pigment is made after printing and disappears in about 2 minutes. However, the printing material produced in such a manner can be used several times.

TABLE 1

Claims (8)

Γ-dinitrophenol, P-nitrophenol, m-nitrophenol, which are substantially colorless to colored by reacting with a colorant containing an alkaline pH regulator that loses color over time by volatilization or drying. At least one pH indicator selected from the group consisting of cyanine, α-naphtholphthalein, ethyl beth-acetic acid phenolphthalein, 0-cresolphthalein, thymolphthalein, and bromophenol purple and the pH before reaction with the coloring aid. Rapidly color development and printing with a coloring ink containing in itself a non-volatile acid substance which can maintain the indicator in a colorless pH range and can react the pH indicator to a colored region by reaction with the coloring aid. Printable material that can be repeatedly used several times to fade. The method according to claim 1, wherein the pH regulator that loses its drag by volatilization is ammonia, monoethanolamine, ethylenamines, propylamines, 2-ethylhexoxyoxypropylamine, 3-ethoxypropylamine, 3-methoxypropyl A printing material, characterized in that it is one or a plurality of mixtures selected from amines, diisobutylamines, sec-butylamines and the like. The printing material according to claim 1, wherein the pH regulator which is lost by evaporation is one or a plurality of mixtures selected from diisopropanol amine and diethanol amine. A printing material according to claim 1, wherein the coloring aid has an acidic material in itself. 5. A printing material according to claim 4, wherein the acidic material is a mixture of volatile and non-volatile. 6. A printing material according to claim 5, wherein the volatile acidic substance loses its effect after the alkali pH adjusting agent. A printing material according to claim 1, wherein the coloring ink has an acidic pH adjusting agent in itself. The printing material according to claim 7, wherein the pH adjusting agent is one or a plurality of mixtures selected from tartaric acid and citric acid.

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