JPS63252778A - Production of display sheet - Google Patents

Abstract

PURPOSE:To obtain a display sheet having natural colors and continuous gradations even under external light having an ordinary wavelength distribution or under 1 UV light source, by raising the mixing ratio of a fluorescent ink in each of yellow, magenta and cyan inks to a specified value. CONSTITUTION:Offser printing is conducted by using yellow, magenta and cyan inks. The yellow ink comprises 30-60wt.% of a yellow ink, 20-50wt.% of fluorescent yellow ink, 10-25wt.% of a fluorescent orange ink and 0-2wt.% of black ink kneaded with each other so that the total amount is 100wt.%. the magenta ink comprises 30-90wt.% of a red ink and 10-70wt.% of a fluorescent red ink kneaded with each other in a similar manner. The cyan comprises 30-70wt.% of a blue ink, 30-70wt.% of a fluorescent blue ink and 0-2wt.% of a black ink kneaded with each other in a similar manner. A display sheet thus produced has natural colors and gradations similar to those of a conventional reflection-type display sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing display sheets such as advertising posters, and particularly to a method for producing display sheets such as advertising posters, and in particular, it can be used with any ordinary light source or with an ultraviolet light source such as an ultraviolet light-emitting fluorescent tube. Concerning a new method for producing display sheets that look natural.

[Conventional technology and problems]

Conventional display sheets are broadly divided into those that are observed using reflected light and those that are observed using transmitted light.・In the former case,
External light with a normal wavelength distribution passes through the ink layer on the surface of the display sheet, is reflected on the sheet body surface, which is usually white paper, and passes through the ink layer again to enter the naked eye. On the other hand, the latter is a transparent positive sheet attached to a light box via a diffuser plate, and the light rays from, for example, a fluorescent lamp inside the light box are transmitted through the transparent positive sheet and incident on the naked eye.

In this way, conventional display sheets process external light and cover it with calligraphic information, and do not emit light themselves.

Therefore, the display sheet produced according to the present invention can be observed as a conventional reflective display sheet under external light with a normal wavelength distribution, and emits light by itself under an ultraviolet light source, making it invisible to the naked eye. This is a novel technique that can be observed even under ultraviolet light sources that are close to darkness.

Conventionally, in order to enhance the coloring of reflective display sheets, it has been common practice to mix, for example, a few percent of fluorescent coloring ink into printing ink.

However, with such reflective display sheets, the gradation of the image becomes discontinuous under an ultraviolet light source, which is unnatural, and the image is too dark to function as a display sheet. do not have.

[Purpose of the invention]

Therefore, it is an object of the present invention to provide natural colors and lit! even under external light with a normal wavelength distribution and under an ultraviolet light source. An object of the present invention is to provide a method for producing a novel display sheet having an i-tone.

[Means for solving problems]

In order to achieve the above object, the present invention provides yellow ink of 30% to 60% by weight, fluorescent yellow ink of 20% to 50% by weight, and fluorescent orange ink of 10% to 25% by weight. A first kneading step of kneading the ink and black ink of 0 weight % or more and 2 weight % or less so that the sum of each weight % becomes 100 weight % to obtain yellow ink;
A magenta ink is obtained by kneading red ink of 30% by weight or more and 90% by weight or less and fluorescent red ink of 10% by weight or more and 70% by weight or less so that the sum of the respective weight% becomes 100% by weight. 2 kneading steps, blue ink with an amount of 30% by weight or more and 70% by weight or less, and 30% by weight or more and 70@ff1%
A third kneading step of kneading the following fluorescent blue ink and a black ink of 0% by weight or more and 2% by weight or less so that the sum of the respective executive percentages becomes 100% by weight to obtain cyan ink;
It is characterized by having one culm of offset printing using these yellow, magenta and cyan inks.

〔Example〕

The present invention will be explained in detail below.

The method of the present invention includes a step of kneading a commercially available offset printing ink (hereinafter simply referred to as ink) and a fluorescent coloring ink for offset printing (hereinafter simply referred to as fluorescent ink) at a new mixing ratio, and The process includes a process of performing normal offset printing using the ink kneaded by the process.

Normally, in offset printing, four to five colors of ink are used: yellow, magenta (red), cyan (blue), ink (black), and white if necessary, but in the present invention, these inks are used. Of the inks, yellow, magenta, and cyan inks are kneaded as follows.

That is, 30% by weight or more and 60% by weight or less, preferably [
40% by weight or more and 51% by weight or less, more preferably about 5% by weight or more
0% by weight yellow ink, 20% by weight or more and 50% by weight or less, preferably 20% by weight or more and 40% by weight or less, more preferably about 30% by weight ink, and 10% by weight or more.
25% by weight or less, preferably 15% by weight or more - 20% by weight or less, more preferably about 18% by weight of fluorescent ink, and zero Φ constant % by 2% by weight or less, preferably 1% by weight.
2% by weight or less, preferably about 2% by weight of black ink, etc., and the sum of each weight% is 1100ff1f%
Rinse it until it becomes yellow ink.

Also, 30% by weight or more and 90% by weight or less, preferably 30% by weight or more
% by weight or more, 250% by weight or less, more preferably about 40% by weight, red ink, 10% by weight or less, 70% by weight or less, preferably 50% by weight or more±70% by weight, more preferably about 60% by weight. % fluorescent red ink and kneaded so that the sum of each weight % becomes 100 weight % to obtain magenta ink.

Furthermore, 30 weight ω% or less 70 weight %, preferably 3
0% to 50% by weight, more preferably about 30% by weight
A blue ink of 30 weight % or more and 70 weight % or less and 1% or less, preferably 50 weight % or more and 70 weight % or less, more preferably about 68 weight % blue ink, and a zero weight % or more of 2
The cyan ink is mixed with black ink in an amount of not more than 1% by weight and not more than 2% by weight, more preferably about 2% by weight, so that the sum of each weight% becomes 100% by weight. do.

Incidentally, since there is only a slight difference in the characteristics of each of the above-mentioned inks and each fluorescent ink depending on the manufacturer, the mixing ratios listed above can be used regardless of which manufacturer's ink is used.

Then, the method of the present invention is completed by printing the ink and fluorescent ink in the above-mentioned mixing ratio using yellow ink, magenta ink, cyan ink, black ink, and if necessary white ink. . The printing process itself is the same as the conventional one, except that the mixing ratio of the ink used is different from the conventional one, so further detailed explanation will be omitted. do.

Exhibition sheet t manufactured through the process described above.
Even under external light having a normal wavelength of 4j, it has natural colors and gradations like conventional reflective display sheets, so it can be used as is, for example, as an advertising poster.

In addition, the fluorescent ink on this display sheet develops color when exposed to ultraviolet light, and not only can designs be drawn against a background that is almost dark to the naked eye, but the colors and gradations are natural, so it can be used as a fluorescent light source. There are countless possible applications, such as combining them into new indoor displays or advertising devices. In particular, when the design is a night head, for example, the neon sign or the lighted part of the window actually emits light, creating a sense of fantasy in the darkness.

〔effect〕

As is clear from the above description, the present invention includes yellow,
The mixing ratio of the fluorescent ink in the magenta and cyan inks has been increased to the value determined by the inventors through experimental research, so that it can be used naturally even under external light that distorts the normal wavelength distribution and under ultraviolet light sources. It is possible to obtain a new display sheet having bright colors and continuous gradations.

In addition, since printing is used, new display sheets can be produced inexpensively and hung from the ceiling9.Furthermore, conventional ink and printing technology can be used as is.
It has various effects such as being extremely easy to implement.

Claims (1)

[Scope of Claims] 1. Yellow ink of 30% to 60% by weight;
Fluorescent yellow ink of 10% to 25% by weight, fluorescent yellow ink of 10% to 25% by weight, and black ink of 0% to 2% by weight, the sum of each weight% being 100% by weight. A first kneading step in which yellow ink is obtained by kneading the yellow ink so that the amount of red ink is 30% by weight or more and 90% by weight or less, and fluorescent red ink is 10% by weight or more and 70% by weight or less, respectively. a second kneading step in which magenta ink is obtained by kneading the sum of 100% by weight;
Blue ink of 0% to 70% by weight and 30% by weight
fluorescent blue ink of not less than 70% by weight and not less than 0% by weight of 2
% by weight or less of black ink, and the sum of each weight % is 1.
A method for manufacturing an exhibition sheet, characterized by comprising a third kneading step of kneading the cyan ink to a concentration of 0.00% by weight, and a printing step of performing offset printing using these yellow, magenta and cyan inks. . 2. Yellow ink in the above yellow ink is 40% by weight
51% or less by weight, fluorescent yellow ink 20% or more by weight4
0% by weight or less, fluorescent orange ink from 15% to 20% by weight, black ink from 1% to 2% by weight, red ink from magenta ink from 30% to 50% by weight
Below, the fluorescent red ink is 50% by weight or more and 70% by weight or less,
Claim 1, wherein the cyan ink contains 30% to 50% by weight of blue ink, 50% to 70% by weight of fluorescent blue ink, and 1% to 2% by weight of black ink. Method of manufacturing display sheets. 3. In the above yellow ink, the yellow ink is about 50% by weight, the fluorescent yellow ink is about 30% by weight, and the fluorescent orange ink is about 1% by weight.
8% by weight, about 2% by weight of black ink, about 40% by weight of red ink in magenta ink, about 60% by weight of fluorescent red ink, about 30% by weight of blue ink in cyan ink,
The method for manufacturing an exhibition sheet according to claim 1, wherein the fluorescent blue ink is about 68% by weight and the black ink is about 2% by weight.