JP4319823B2 - Copy check printed matter - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a copy check print, and more particularly to a print that is visible only when a latent image print unit is observed from a predetermined angle.
[0002]
[Prior art]
In recent years, there have been frequent cases of forgery of high-value banknotes and gift certificates with color copiers.
As one of the preventive measures, high-value vouchers such as banknotes and gift certificates have small halftone dots and fine lines that cannot be read by color copier sensors as part of the design. When these high-value vouchers are incorporated into a color copying machine and copied, the scanner of the copying machine reads out small dots and fine lines, and those portions are whitened to discriminate copies.
[0003]
In addition, the concave and convex surface of the light diffraction structure replicated with a transparent resin is subjected to metal vapor deposition, thermally transferred to a part of the printing area, and copying by a copying machine is restrained.
The optical diffractive structure that has been thermally transferred as part of the pattern of the printed material may have a different pattern depending on the viewing angle, or it may reproduce a three-dimensional image. And no effect.
Further, when copying with a copying machine, a part of the light diffractive structure part regularly reflects incident light, so that part is reproduced in black.
[0004]
A method of discriminating a copy by providing a glossy portion made of metal in a part of the design of the print is also in practical use.
When a metallic foil or the like is transferred onto a printing substrate having fine irregularities, or a part of gloss is formed by inserting a gold thread into paper, the copied glossy part reflects incident light 100%. To do this, the copier reproduces this part in black.
In addition, by applying this technology, by forming fine irregularities around the metal foil formed on the printing substrate such as paper, it becomes a character or symbol part, and when the metal foil part is copied, it is flat. A technique for discriminating what has been copied by reproducing characters and symbol portions formed as portions in black has been disclosed (see Patent Document 1).
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-150800
[Problems to be solved by the invention]
However, it is difficult for the printed matter on which the metal foil is formed to harmonize the metallic metal foil with the surrounding printing color, and the metal foil has a drawback that it increases the unit price of the printed matter.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 of the copy check printed matter of the present invention is a printed matter in which the same surface is printed with a plurality of colors of printing ink, and at least one of the printing portions printed with the plurality of colors. The latent image printing portion is printed with a colorless and transparent ink, and the latent image printing portion is printed with a thicker ink than the other printing portions.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a copy check printed matter of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram for explaining a copy-check printed matter having a latent image printing unit according to the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. FIG. 4 is a diagram for explaining a reflection state of incident light of a copying machine when copying part B of FIG. 2, and FIG. 5 is another design example of a gift certificate.
[0010]
A copy check printed matter having a latent image printing unit according to the present invention will be described with reference to FIG.
The printed matter 1 will be described using an example of a gift certificate that is an embodiment of a cash voucher.
As the base paper 14 used for the voucher, paper having a long fiber and a very low mixing rate of inorganic substances is used.
The gift certificate 1 is printed with a management number using optically read characters on the surface of the gift certificate in order to check the distribution status.
The management number is required to have machine reading characteristics in order to be read by the machine.
One of the physical property items for improving machine readability is a paper surface friction coefficient, and the base paper surface has an appropriate rough surface so as to have a predetermined friction coefficient.
[0011]
On the front side of the gift certificate, in addition to the characters “gift certificate”, the letter “Yen” as the ticket type display character 12 is printed.
The ticket type display character “壱 萬 円” may be printed in any color, but here it is printed in black (black).
In addition, the symbol printing unit 13 is printed on the same surface.
The symbol printing unit 13 is a part of the design and is printed in a plain color so that the ticket type display character 12 is conspicuous.
[0012]
A latent image printing unit 11 is designed at the center of the symbol printing unit 13 and is overprinted on the ticket type display character 12.
The latent image printing part is printed with a lattice pattern inside the ellipse, and here it is printed with colorless and transparent ink.
Although the latent image printing unit 11 is described as being printed with colorless and transparent ink, in actual printing, the ink roller is soiled with ink that has been printed before, and the printed state is slightly colored. There is a case.
Therefore, when printing a colorless and transparent printing portion, a printing unit exclusively for colorless and transparent ink is always used, and the printing order is set as much as possible in the previous step.
When the printing ink is an ultraviolet curable ink, the printing order may be any part.
When printing the latent image printing part of the colorless and transparent part, in order to match the “registration” of printing, for example, the colorless and transparent ink is kneaded with colorless and transparent, for example, an organic fluorescent material that does not interfere with the glossy reflection. Then, a method of printing while checking with a UV lamp whether the latent image printing unit is printed at the correct position is adopted.
In the example of FIG. 1, the latent image printing unit 11 has a lattice pattern and a wide area design, but any part of the design printing unit 13 may be a latent image printing unit.
[0013]
In addition to the printing shown in FIG. 1, although not shown as the front side design of the gift certificate, a background pattern, the name of the issuing company that issues the gift certificate, various caution words and explanations related to the gift certificate, etc. are printed.
The latent image printing unit may be a peripheral design other than the ticket type display character 12 and the symbol printing unit 13.
[0014]
In FIG. 1, the case where the ticket type display character 12 is printed with black ink and the latent image printing unit 11 is printed with colorless and transparent ink is described. However, when this gift certificate is copied with a color copying machine, the black ink is used. The printed ticket type display character 12 is reproduced in black, and the lattice-pattern latent image printing unit 11 printed with colorless transparent ink is reproduced in colorless.
[0015]
If the ticket type display character 12 is black and the latent image printing unit 11 is printed with a grid pattern of other colored ink, the copying machine reproduces the color printed with the colored ink. When observed at a predetermined angle, the latent image printing unit can be distinguished from the real one in order to show a reflection state similar to other parts.
Further, when the latent image printing unit 11 is colored ink and the copying machine is a toner system, the latent image printing unit and other printing units are overlapped with toner, so that the entire printing surface is glossy. It is reproduced in a tinged state, and only the latent image printing unit can discriminate between a genuine product and a copy product having a slight gloss.
[0016]
As described above, the conventional copy prevention technique uses the regular reflection printing portion incorporated as a reflection portion by a metal foil or the like as the copy determination portion, but according to the present invention, the copy determination portion uses colorless and transparent ink. Therefore, the design is free and it is possible to express without worrying about cost.
For example, as shown in FIG. 5, when the specular reflection printing portion (shown by reference numeral 11 in FIG. 5) made of metal foil is designed over the entire gift certificate, the gift certificate 1 The metal foil corresponding to the area of the gift certificate is used per sheet, and the cost of the metal foil in the gift certificate becomes enormous.
[0017]
In addition, as an example of other design embodiments, a latent image printing section is set over the entire surface of a gift certificate, and a tint block design using relatively transparent characters such as “authentic”, “genuine”, and “copying prohibited” with colorless and transparent ink. May be printed as
If such fine characters are printed in a background pattern, the glossy part is displayed in fine characters on the entire surface even if the gift certificate is tilted, so that those characters cannot be read and are also distributed. It does not get in the way.
On the other hand, for example, designing “◯” or the like with a thick line is visible when the gift certificate is tilted, which causes a design problem.
[0018]
2 is a cross-sectional view taken along line AA in FIG.
On the surface of the base paper 14 of the gift certificate 1, a line of the pattern printing unit 13 is formed on the surface of the base paper 14 as a layer of ink on which a latent image printing unit 11 is relatively thickly stacked. Has been.
[0019]
FIG. 3 is an enlarged view of a portion B in FIG.
As shown in the figure, the surface state of the printed ink is slightly different between the symbol printing unit 13 and the latent image printing unit 11.
That is, since the surface of the ink of the pattern printing unit 13 is often printed by a soft touch method such as offset printing, the shape of fine irregularities on the surface of the base paper 14 is reproduced as it is.
[0020]
On the other hand, the latent image printing unit 11 has a large amount of ink and does not reproduce fine irregularities of the base paper, and has a flat shape.
To a flat condition part or the entire surface of the latent image printing unit 11, to soften the printing ink, print multiple times the same parts.
As another method, the latent image printing unit 11 is pressed in advance to make the unevenness of the surface of the base paper fine, and printing is performed from there .
As a result, by tilting the voucher, the latent image printing section when observing the latent image printing section is visible glowing slightly, the printing unit other than the latent image printing unit is visible in the same state as base paper surface The
[0021]
With reference to FIG. 4, how the copying machine recognizes the surface of the gift certificate when the surface of FIG. 3 is copied will be described.
[0022]
Light (incident light) 21, 22, 23 from the light source of the copying machine or scanning light is reflected on the respective surfaces 11, 13, 15 of the gift certificate and diffusely reflected light 211, 212, 221, 231, respectively. Is generated.
Incident light 23 reflected from the paper surface 15 reflects light in various directions by diffuse reflection.
The diffuse reflected light 231 reflected in a state near right angle with respect to the base paper therein is captured by the sensor of the copying machine, and the color copying machine reproduces the color of the paper into a copy. Other diffusely reflected light diffuses out of the sensor's eyes.
[0023]
Similar to the incident light 23 reflected on the paper surface 15, the incident light 22 incident on the pattern printing unit 13 reflects light in various directions by diffuse reflection.
The diffuse reflected light 221 reflected in a state near right angle with respect to the base paper is captured by the copying machine sensor and reproduced on the copy as the color of the design printing unit.
Other diffusely reflected light diffuses out of the sensor's eyes.
[0024]
The incident light 21 incident on the latent image printing unit 11 has a relatively flat surface, but diffuse reflection light is generated.
That is, the incident incident light 21 becomes reflected light 212 in a state where the incident light 21 is very close to 100%.
The diffuse reflected light 211 that is reflected at a right angle with respect to the base paper is slightly less than that of the other printing units, but the copying machine determines that this portion is a latent image printing unit and copies the latent image printing unit to the copy. The color of the ink is reproduced as being formed.
[0025]
Latent image printing unit, in a predetermined angle by even without completely filled with the unevenness of the base paper with printing ink forming the anti-reflecting surface, can be viewed as a reflection pattern, other printing in copier Reproduced as printing ink color for processing in the same way as ink.
[0026]
FIG. 5 shows an example in which the latent image printing unit 11 is formed in a portion other than the ticket type display characters of the gift certificate 1, but it may overlap with the symbol printing unit as shown in the figure or may be independent. good.
By making the printing color colorless and transparent, counterfeiting by copying can be suppressed without disturbing the design of the pattern.
[0027]
【The invention's effect】
(1) According to the invention described in claim 1, in a printed matter in which the same surface is printed with printing inks of a plurality of colors, at least one color of the printing unit printed with the plurality of colors is a latent image printing unit, When the latent image printing unit is printed so that the amount of specular reflection is larger than that of other printing units, it is visually recognized in the normal viewing state and in the copy color of the copying machine in the normal observation state. When the image is observed at a predetermined angle, only the latent image printing portion is visually recognized by reflection, so that the real image and the copied image are distinguished.
(2) According to the invention described in claim 2, in the invention described in claim 1, the latent image printing unit prints a pattern which is not visually recognized in a copy by being printed with colorless and transparent ink. It can be visually recognized at a predetermined angle, and it becomes easier to distinguish the real product from the copy.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a printed matter having a latent image printing portion according to the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. FIG. 5 is a diagram for explaining a reflection state of incident light from a copying machine when copying part B in FIG. 2; FIG. 5 is another design example of a gift certificate;
DESCRIPTION OF SYMBOLS 1 Printed matter 11 Latent image printing part 12 Ticket type display character 13 Design printing part 14 Base paper 15 Paper surface 21 Incident light 22 to a latent image printing part Incident light 23 Design printing part Incident light 211, 212, 221 231 Diffuse reflected light

Claims (1)

In a printed matter in which the same surface is printed with a plurality of colors of printing ink, at least one of the printing portions printed with the plurality of colors is a latent image printing portion printed with a colorless and transparent ink, and the latent image printing portion is another A copy check printed matter, characterized in that the ink is printed thicker than the printing part.

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