JPH09240133A - Printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed matter, with which the discrimination and judgement between a legal printed matter (a real thing) and a color-copied reproduced matter (a false thing) only by naked eyes can be easily carried out and which has an antifalsifying effect having a wide application. SOLUTION: On some part of a printed matter 10, a specified pattern 3 is provided. The specified pattern 3 is produced by providing a nacreous ink layer on the ground made of low reflectance darkcolor-based ink layer so as to reproduce the color of the specified pattern 3 reproduced with a color copier into a different color, which can discriminate even with naked eyes, in a reproduced matter 10'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to printed matter such as cash vouchers, certificates, cards, etc., having functions of preventing forgery and alteration using a color copying machine.

[0002]

2. Description of the Related Art In recent years, banknotes that must have been subjected to advanced counterfeit prevention measures due to technological advances in color copiers,
Counterfeit goods such as gift certificates, invitation tickets, and cards are now on the market, which has become a social problem. As a countermeasure against counterfeiting by this color copy, until now, finer characters (300μ) than the scanning accuracy (400DPI) of color copy have been used.
(a size of about m), that is, a method of printing fine characters that exceed the resolving power of the copier and checking the fine characters with a magnifying glass to determine whether they are true or false. A method has been used in which printing is performed in advance with a transparent fluorescent ink that emits fluorescence upon irradiation, and then black-light is applied to the transparent fluorescent ink to make a true / false judgment. Another method is to print a copy check pattern that combines halftone dots of a size that can be resolved by a color copier and halftone dots that cannot be resolved, and then display a check pattern such as warning characters when copying. It is used.

[0003]

However, in the method of using fine characters or colorless fluorescent ink which has been conventionally used,
You have to use a magnifying glass or a black light to distinguish between genuine and color copy.
Without using such equipment, anyone can visually check
It was difficult to judge easily. Moreover, when a printed matter having a copy restraint pattern is copied, the potentially hidden warning characters and patterns become apparent, and it is possible to easily visually identify the copy, that is, the counterfeit pattern function. The printing of the printed matter that is carried requires advanced plate making and printing technology to control the thickening and thinning of halftone dots,
There is a problem that the printing cost becomes high. The present invention has been made in view of the above-mentioned problems, and it is possible to make a genuine / counterfeit judgment between a genuine article and a fake article only by visual observation without using a special instrument or device,
Moreover, it is an object of the present invention to provide a printed matter having an anti-counterfeiting effect that can be easily printed by the conventional printing method.

[0004]

The present invention, which has been made to solve the above-mentioned problems, is a multicolor printed matter in which a specific pattern is printed with a special color ink, and the color of the special color ink is visually observed by copying with a color copying machine. However, a pearlescent ink is used as the special color ink, and a dark ink layer having a low light reflectance is provided on the base of the specific pattern.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view of a printed matter according to the present invention. FIG. 1A is a layout diagram of a printed material (genuine) 10 according to the present invention when used for a service card.
In this printed matter 10, as shown in FIG.
The character pattern 2 is printed in a solid color on the white plastic card base material 1, and the name of the golf club providing the service is displayed in the oval specific pattern 3 as a blank character.
This specific pattern 3 is solidly printed with a pearlescent ink on a dark blue base printing. The spot color pattern 3 of the printed matter according to the present invention does not necessarily have to be the company name, and may be a pattern such as a sales mark or a logo or mark specially added for the purpose of authenticity identification. It is desirable to be printed in position. Further, as a printing method of the printed matter according to the present invention, printing methods such as offset, gravure and silk screen can be used. However, for printing the specific pattern 3, gravure and silk screen are preferable to offset because of the pearl pigment.

FIG. 1 (b) shows a copy (counterfeit) 10 'of the above-mentioned printed matter 10 by a color copying machine. Copy 1
In 0 ', the pearl luster (indicated by dots) in the specific pattern 3 is lost, and the hue is reproduced as a gray system. When the printed matter 10 and the copied matter 10 'are compared, the above difference is immediately noticed only by visual inspection, and when the fake article 10' is seen with the eyes familiar with the genuine article 10, the abnormality is also noticed. According to the printed matter of the present invention, it is possible to discriminate the genuine article and the fake article by simply visually observing each individual without using a magnifying glass or a black light. Further, since the above-mentioned printed matter 10 can be sufficiently printed at the conventional printing technology level, it can be widely used in addition to cards and the manufacturing cost can be suppressed low.

Generally, pearl luster pigments that have been used by being mixed in paints, inks, plastics, cosmetics, etc., are transparent ones in which a titanium dioxide layer is formed on the surface of fine flaky mica. Is a bright color,
The pearl luster ink used in the present invention was reduced in the surface of the titanium dioxide to be blackened as low order titanium oxide though it was disturbed by the reflected light and sufficient pearl luster and interference color were not obtained. By providing a layer and further providing a titanium dioxide layer on the surface of the layer, a pigment is used which effectively exhibits pearly luster and various interference lights even when the background is a white background. Therefore, it is possible to easily provide the specific pattern showing the pearly luster and the interference light whose color changes depending on the viewing angle on the white plastic card shown in FIG. However, by providing a dark-colored ink layer having a low reflectance on the base, it is possible to suppress the reflected light from the base, enhance the interference light of pearl luster, and enhance the discoloration effect. Further, the pearlescent ink can be used after being mixed with another colored pigment to be colored in an arbitrary color.

As the color materials of the three primary colors used for color copying, color toners or liquid jet inks composed of cyan, magenta and yellow, which have color tones close to those of the multi-color printing three primary color inks, are used. The color reproduction range is determined by subtractive color mixing that is a combination of. Colors within this range can be reproduced almost completely, but since the above-mentioned delicate pearl luster or interference light is simply caught by the color copier as component light, these are reproduced only as simple gray-based colors, It is not possible to reproduce the visible glossiness.

[0009]

EXAMPLE An example sample of a printed material according to the present invention was prototyped under the following conditions, and a copy was prepared from the prototype sample by copying with a color copying machine, and the authenticity of both was determined. The printing paper used was similar to the copy paper of a color copier. Printing paper: Coated paper 73 g / m ² Finished size: 55 × 85 mm card shape Specific pattern: An elliptical pattern was placed at the center of the card, and the base was a dark blue solid. Printing method: Only the elliptical pattern was silk screen printed, and the others were offset printed. Pearl luster ink: A silk screen ink using Infinite Color (VP-02) manufactured by Shiseido Co., Ltd. as a colored pearl pigment was used. Color copier: PIXEL DIO, NEW PIXEL DIO Peel density: Standard density True / False identification method: Mix several copies in about 100 prints and visually extract with 10 panelists under fluorescent lighting. Let From the above results, it was possible to determine the authenticity with 100% accuracy.

As described above, the printed matter according to the present invention uses the pearlescent ink for printing a specific pattern. However, if the manufacturing cost is allowed, it is effective to combine other anti-counterfeiting means. Is. For example,
Double forgery prevention measures such as printing a part of the card as shown in FIG. 1 (a) with fine characters exceeding the resolution of the copying machine, or printing a check pattern on the entire bag It is effective to give it.

The printed matter according to the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the specific pattern does not necessarily have to be a solid block pattern, and may be a pattern having continuous gradation. Further, the pearl pigment may be kneaded into the plastic base material without printing the specific pattern.

[0012]

EFFECTS OF THE INVENTION According to the printed matter of the present invention, the color of the specific pattern having the pearly luster and the interference light by the pearl luster ink is reproduced in the gray hue which is not glossy in the copy by the color copy, and thus the specific color is obtained. If attention is paid to the pattern, the genuine product and the forged product can be discriminated very easily only by visual observation, and there is an anti-counterfeit effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a printed matter according to the present invention.

[Explanation of symbols]

 1 Base Material of Printed Material 1'Substrate of Copy Material 2 Character Pattern 2'Character Pattern in Copy Material 3 Specific Pattern 3'Specific Pattern in Copy Material 10 Printed Material (Genuine Product) 10 'Copy Material (Counterfeit)

Claims (3)

[Claims] 1. A multicolored printed matter in which a specific pattern is printed with a special color ink, wherein the color of the special color ink is reproduced in different colors which can be visually recognized by copying with a color copying machine. 2. The printed matter according to claim 1, wherein a pearlescent ink is used as the special color ink. 3. A dark color ink layer having a low light reflectance is provided on the base of the specific pattern.
Printed matter described.