JP4682280B2 - Anti-counterfeit printed matter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention visually recognizes moire patterns that are applied to valuable printed materials that require prevention of counterfeiting and tampering such as banknotes, securities, passports, identification cards, cards, stamps, certificates, admission tickets, etc. The present invention relates to an anti-counterfeit printed material that can be printed and a method for producing the same.
[0002]
[Prior art]
Precious printed matter such as banknotes, securities, passports, identification cards, cards, stamps, certificates, admission tickets, etc. are required to be difficult to forge or tamper. As a preventive measure, a technique is known in which a fine image line configuration or the like is provided and the authenticity is determined based on the presence or absence of the configuration.
[0003]
However, since a fine image line configuration and the like can be almost reproduced by a color copying machine, authenticity determination cannot be easily performed. In particular, there is a risk that the above-mentioned precious printed matter is easily duplicated and counterfeited due to the recent improvement in accuracy of electronic color copying machines, scanners, and the like.
[0004]
In such a technical background, two printed lines 19 and 20 composed of a plurality of equally-spaced straight lines or curved lines shown in FIGS. 9A and 9B are crossed with each other on the substrate 1. As shown in FIG. 9 (c), the technology of counterfeit printed matter that makes it possible to visually recognize the moiré 21 on a straight line along the intersection as shown in FIG. Are known.
[0005]
Further, the present applicant forms a relief pattern having a concavo-convex shape on a substrate by intaglio printing, embossing or squeezing, and gives a latent image or moire pattern by printing a monochromatic line pattern on it. In addition, there has already been proposed an invention whose gist is to make it possible to recognize a latent image or a moire pattern by observing the substrate at different angles and to use it for authenticity discrimination (Patent No. 2600094, No. 2615401) JP, 9-76622, A).
[0006]
Further, in the present applicant, a plurality of color printing lines composed of color elements of a color image are printed on a relief line formed on a substrate, and a color having gradations of light and shade is obtained by observing obliquely. A forgery-preventing latent image pattern forming body capable of recognizing a latent image has already been proposed (see JP 2000-313160 A).
[0007]
[Problems to be solved by the invention]
However, in the printed matter already proposed in FIG. 9, the two lines are composed of single-colored lines, and are composed of lines printed at equal intervals. However, since it can be visually recognized from anywhere and only a simple moire pattern that is linear and linear as described above is produced, it is still not sufficient from the viewpoint of preventing counterfeiting.
[0008]
In addition, the prior invention related to the single-color latent image or moiré pattern proposed by the present applicant also confirms the latent image expressed by the contrast between the color of the substrate and the single color of the line pattern. There is room for further improvement so that the latent image can be confirmed at a glance.
[0009]
In addition, the printed line of a plurality of colors printed on the relief line proposed by the applicant of the present application can be used only to observe a color latent image, has a more complicated shape, and is colored. There is room for further improvement from the viewpoint of improving the authenticity of authenticity discrimination because it does not attempt to reveal a moire pattern.
[0010]
The present invention aims to solve such a conventional problem and cannot be recognized even when observed from the front, but can be recognized when observed from an oblique direction, exhibits a rainbow color, and is complicated in a radial pattern. The moire of the shape is generated, and thereby the authenticity determination of the printed matter is to realize a forgery-preventing printed matter that is more reliable than the single color and can be clearly and easily discriminated.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a multi-color line-shaped printed image line that is a color element of a color image on the surface of the base material on which convex parallel lines having the same color as or transparent to the base material are formed. Is printed so as to intersect with the convex line, and a moiré pattern having a rainbow color is visible only when observed obliquely with respect to the printing surface of the substrate. Providing prevention printed matter.
[0012]
In order to solve the above problems, the present invention provides a convex surface having the same color or transparent color as that of the base material on the surface of the base material on which a plurality of line-shaped printed image lines serving as color elements of a color image are printed. Forgery prevention characterized in that a moiré pattern having a rainbow color is visible only when the line is formed so as to intersect with the printed image line and observed obliquely with respect to the printed surface of the base material Provide prints.
[0013]
In order to solve the above-mentioned problems, the present invention forms on the surface of the base material a convex line that is the same color as or transparent to the base material, and then forms a plurality of color elements of the color image on the surface of the base material. By printing the color line-shaped printed image line so that it intersects the convex line, the moiré pattern that shows a rainbow color is visible only when observed obliquely with respect to the printed surface of the substrate. Provided is a method for producing an anti-counterfeit printed matter characterized by obtaining a possible anti-counterfeit printed matter.
[0014]
In order to solve the above problems, the present invention prints a plurality of lines of printed image lines that are color elements of a color image on the substrate surface in order to solve the above problems, Thereafter, by forming convex parallel lines that are the same color or transparent as the base material so as to intersect the print image line, a moire that exhibits an rainbow color only when observed obliquely with respect to the printed surface of the base material. Provided is a method for producing an anti-counterfeit printed matter, characterized by obtaining an anti-counterfeit printed matter with a pattern visible.
[0015]
The convex line and the line-shaped printed image line are each composed of one or both of a straight line and a curved line.
[0016]
The curves are wavy lines having different amplitudes.
[0017]
The base material is formed of paper, resin, fiber, or metal.
[0018]
The convex line is formed by embossing, intaglio printing, or scoring.
[0019]
The convex line is formed by embossing or intaglio printing.
[0020]
The printed image line is printed with three color inks of yellow, magenta and cyan.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a forgery-preventing printed material and a method for producing the same according to the present invention will be described below with reference to the drawings.
[0022]
(Structure overview)
First, an outline of a forgery-preventing printed material and a method for producing the same according to the present invention will be described. The anti-counterfeit printed matter and the method for producing the same according to the present invention are, for example, valuable printed matter such as securities, passports, identification cards, etc., which are the same color or transparent as the base material and are raised from the surface of the base material A line group (in this specification, this is referred to as a “convex line”) in which a plurality of lines are assembled into a single line is formed, and further, a color is formed on the convex line on the substrate. A plurality of color line-shaped print image lines serving as color elements of an image are printed so as to intersect the convex line.
[0023]
A base material is formed from materials, such as paper, resin, and a fiber. Convex lines are formed by embossing, intaglio printing, scoring and the like. The emboss is usually formed as a raised line by pressing. Intaglio printing is formed as a raised printed image line with the same color or transparent ink as the substrate. The gap is formed as a raised gap line at the time of paper making. It is preferable that the angle at which the convex image line and the printed image line intersect varies between 1 degree and 30 degrees.
[0024]
The plurality of colors of the print image line are a plurality of colors that are the color elements of the color image. For example, three colors of yellow (Y), magenta (M), and cyan (C) are adopted. The desired color image is printed by the lines. Each line width of the print line is preferably between 50 microns and 150 microns. For example, when three colors of yellow (Y), magenta (M), and cyan (C) are adopted, YMC, YMC, It is preferable that YMC is repeated. Moreover, it is preferable not to provide a non-image part between each image line repeated by yellow (Y), magenta (M), and cyan (C).
[0025]
When the anti-counterfeit printed matter according to the present invention configured as described above is observed from the front (directly above) the printing surface, a mixed color (gray system) of three colors composed of three color print lines is visually recognized. However, when this is observed obliquely with respect to the printing surface, a rainbow-colored moire pattern can be visually recognized, thereby making it possible to determine the authenticity of the printed matter.
[0026]
In addition, the forgery-preventing printed matter according to the present invention described above printed a line-shaped color print image after forming a convex line on the substrate, but the color print image line was first printed on the substrate. It is also possible to form a convex line after printing. In this case, the convex line is formed of the same color or transparent ink as the embossed or base material.
[0027]
1 to 3 will be described with reference to FIGS. 1 to 3 illustrating the basic configuration of the convex lines and printed image lines of the forgery-preventing printed material according to the present invention, and the functions, operations, and effects thereof.
[0028]
In each of FIGS. 1-3, (a) shows the structure of the convex line formed on the base material (actually, it cannot be visually recognized by the convex line of the same color or transparent as the base material, (B) is a three-color line-shaped printed image line of Y, M, and C printed on the base material on the convex line (actually, it is enlarged in FIG. 5 described later) (C) shows the structure of the three-color print image line as shown in the figure), and (c) shows a forgery-preventing printed matter in which the print image line is printed on the substrate on which the convex lines are formed on the printing surface. On the other hand, the state observed from diagonally is shown.
[0029]
Contrary to this example, (a) shows the configuration of three color print lines Y, M, and C printed on the substrate on the convex line, and (b) shows the configuration on the substrate. Even if the configuration of the convex line formed in is shown, a rainbow-colored moire pattern is similarly generated, and the same effect is obtained.
[0030]
1 to 3, convex lines or line-shaped printed image lines are curved upward or downward. In the following description, the lower part is negative and the upper part is positive. Thus, for example, a wave that curves upward is referred to as a “positive wave”, and a wave that curves downward is referred to as a “negative wave”.
[0031]
FIG. 1 shows a printed matter formed by forming a negative wave convex line 2 on a substrate 1 and printing a linear printed image line 3 thereon. The convex lines 2 shown in FIG. 1 (a) are each drawn as a negative wave (sin curve) as a whole, and the distance between the start point and end point of the line is the same, but the amplitude of each wave is modulated. The intervals are different on the way. On the other hand, the line-shaped printed image line 3 shown in FIG. 1B is composed of a plurality of straight lines with equal intervals, and each line is one of the three colors Y, M, and C which are color elements. It is colored with.
[0032]
An anti-counterfeit printed matter obtained by forming a convex line 2 on the substrate 1 and further printing a line-shaped three-color printed image line 3 on the substrate 1 can be observed from the front. The three color mixture (gray system) constituted by the print image line 3 can only be visually recognized. The reason is that the convex line 2 is the same color or transparent as the base material 1, so the convex line 2 itself is not visually recognized, and the printed line 3 is formed by the convex line 2. This is because the mixed color (gray system) of the three colors formed by the printed image line 3 is visually recognized without any influence on the appearance.
[0033]
However, when observed obliquely with respect to the printing surface of the anti-counterfeit printed matter 4, a radial moire pattern (interference fringes) 5 as shown in FIG. 1C is formed. The feature of the present invention is that such a moire pattern 5 is a radial moire pattern that can be visually recognized only when observed obliquely with respect to the printing surface and has a rainbow color. The mechanism of the occurrence is as follows.
[0034]
When the anti-counterfeit printed matter 4 is observed obliquely with respect to the printing surface, the convex line 2 is raised, and therefore the printed line 3 is opposite to the observation direction with respect to the convex line 2. A portion along the convex line 2 located on the side is concealed.
[0035]
In short, along the convex line 2 is located on the opposite side of the observation direction, and a shaded portion is formed in the shape of a line, and interference occurs along the intersection of the shaded portion and the printed image line in the shape of the line. The moire pattern 5 is generated and can be visually recognized. In addition, since the print image line 3 is a color image line of three colors, the print image line 3 can be visually recognized in a moiré pattern having a rainbow color.
[0036]
When the angle of observation with respect to the printing surface of the anti-counterfeit printed matter changes, the area to be concealed changes due to the protrusion of the convex line 2 itself, and the area and shape of the visible printed image line 3 change. To do.
[0037]
In that case, the closer the observation angle is to the horizontal with respect to the printed surface of the printed matter, that is, the larger the area concealed with respect to the printed image line and the paper portion due to the protruding convex lines, the stronger the image change, It can be recognized as a prominent image. Eventually, by observing the printed matter from an arbitrary observation angle and observation direction other than the front direction with respect to the print surface, it is possible to recognize a moiré pattern exhibiting a rainbow color and a change in an image including the moiré pattern.
[0038]
FIG. 2 shows a printed matter formed by forming a negative wave convex line 2 on a substrate 1 and further printing a negative wave three-color printed image line 6 thereon. The convex line 2 shown in FIG. 2A and the printed image line 6 shown in FIG. 2B are both drawn with negative waves (sin curves) as a whole. However, when comparing the amplitude of the convex line 2 and the amplitude of the printed image line 6, the former is small and the latter is greatly modulated. As a result, the convex line 2 and the printed image line 6 have an intersection.
[0039]
In the anti-counterfeit printed matter 7 shown in FIG. 2, the convex line 2 is the same color or transparent as the base material 1, as in the printed matter shown in FIG. 1. The printed image line 6 is not affected by the appearance of the printed image line 6 and the mixed color (gray system) of the three colors formed by the printed image line 6 is visually recognized. A moire pattern (interference fringe) 8 having a radial rainbow color as shown in FIG.
[0040]
In FIG. 3, a convex wave line 2 having a negative wave (sin curve) shown in FIG. 3A is formed on the base material 1, and the positive intervals at equal intervals shown in FIG. The anti-counterfeit printed matter obtained by printing the curved three-color printed image line 9 is shown. Due to such a configuration, the convex line 2 and the printed image line 9 have portions that intersect each other.
[0041]
The anti-counterfeit printed matter shown in FIG. 3 is the same as the printed matter shown in FIG. 1, and the three-color printed image line 9 is not affected by the appearance of the convex line 2 without any influence on the appearance. The mixed color (gray system) of the three colors constituted by the line 9 is visually recognized, but when observed obliquely with respect to the printing surface, the forgery-preventing printed matter 10 exhibits a radial rainbow color as shown in FIG. Moire patterns (interference fringes) 11 are observed.
[0042]
(Example)
Furthermore, the Example of the forgery prevention printed matter based on this invention is demonstrated in FIGS. FIG. 4 (a) shows a convex line 12 formed by embossing, intaglio printing or scoring formed on the substrate 1 (shown by the ground portion of the paper surface). The convex line 12 is composed of a plurality of repeating curves of waves (sin curves) in the width direction. And this convex parallel line 12 is comprised so that the amplitude of a wave may increase little by little toward the both sides S and S from the center part O of the width direction.
[0043]
From above the convex line 12 formed on the substrate 1, a plurality of symmetrical regions 13 (regions partitioned as shown in FIG. 4B) have different designs (shapes). A certain line-shaped print image line 14 is printed. This print image line 14 is shown in FIG. The print image line 14 is composed of three color image lines of Y, M, and C as color elements, as shown in the enlarged image line drawing of the printed matter in FIG.
[0044]
In this way, after the convex line 12 shown in FIG. 4A is printed on the substrate 1, the forgery prevention printed matter 15 formed by printing the printed image line 14 shown in FIG. As shown in FIG. 6B, the mixed color (gray system) of the three colors constituted by the print image lines 14 is visually recognized (the same image as the image of the print image lines shown in FIG. 5).
[0045]
When observed obliquely with respect to the printing surface of the anti-counterfeit printed matter 15, as shown in FIG. 6A, a rainbow formed along the intersection of the convex line 12 and the printed image line 14. A radial moire pattern 16 exhibiting a color is visually recognized. By confirming the moire pattern 16, it is possible to determine the authenticity of the printed matter to be determined.
[0046]
When observed obliquely from the printed surface in this way, as shown in FIG. 7 (a visual image when the printed material is observed slightly obliquely) and an enlarged view of the main part thereof, the convex line 12 (shown in FIG. 7). Embossing) and the color printed image lines 14 colored in three colors Y, M, and C cross each other, so that they do not look linear along the convex line 12 when observed obliquely. A portion is generated, and the moire pattern 16 is generated and visually recognized.
[0047]
FIG. 8 is a diagram for explaining a modification of the embodiment of the forgery-preventing printed matter according to the present invention. In this modification, first, a line-shaped color as shown in FIG. The print image line 17 is printed. Thereafter, a convex line 18 as shown in FIG. 8B is pressed onto the surface of the substrate 1 from above the printed image line 17 (the outline is indicated by a dotted line in FIG. 8B). It is formed by intaglio printing. Functions and effects of the anti-counterfeit printed matter obtained by this modification are the same as those of the anti-counterfeit printed matter according to the embodiment.
[0048]
The embodiment of the anti-counterfeit printed matter according to the present invention has been described based on the examples. However, the present invention is not particularly limited to such examples, and the scope of the technical matters described in the claims. It goes without saying that there are various embodiments within.
[0049]
【The invention's effect】
The anti-counterfeit printed matter and the method for producing the same according to the present invention are configured as described above, and thus cannot be recognized even when observed from the front, but can be visually recognized when viewed from an oblique direction, exhibit a rainbow color, and have a radially complicated shape. Thus, the authenticity determination of the printed matter is to realize the anti-counterfeit printed matter that has a higher reliability of authenticity determination than that of a single color and can be clearly and easily distinguished.
[0050]
Therefore, the anti-counterfeit printed matter according to the present invention is required only when observing from a certain direction when determining authenticity of, for example, banknotes, passports, securities, cards, etc., where publicity and reliability are required. Iridescent specific characters and designs can be formed and the presence or absence of specific characters and designs can be recognized very easily.
[0051]
In addition, by devising the shape, design, color, etc. of the printed image lines that intersect the convex lines, when observing obliquely, the radial and other moire patterns are complicated and diversified, forgery and alteration It is difficult to tamper with, and the forgery prevention effect can be enhanced.
[0052]
Furthermore, according to the anti-counterfeit printed matter and the method for producing the same according to the present invention, even if it is attempted to forge by a color copying machine and a photoengraving method, it is difficult to extract a raised image line, and the printed image line is not reproduced and reproduced. Has a very high anti-counterfeiting function because it cannot recognize characters and designs due to the occurrence of complicated moiré.
[0053]
Thus, according to the anti-counterfeit printed matter and the method for producing the same according to the present invention, a high-quality moire pattern can be created by accurately printing a printed image line on a convex line, thereby producing a precise and complicated pattern. Can be used to create anti-counterfeit printed matter that can be used for various purposes such as banknotes, passports, securities, and cards. .
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a basic configuration of the present invention.
FIG. 2 is a diagram illustrating a basic configuration of the present invention.
FIG. 3 is a diagram illustrating a basic configuration of the present invention.
FIG. 4 is a diagram illustrating a configuration of an example of the present invention.
FIG. 5 is a diagram illustrating a configuration of an example of the present invention.
FIG. 6 is a diagram illustrating a configuration of an example of the present invention.
FIG. 7 is a diagram illustrating a configuration of an example of the present invention.
FIG. 8 is a diagram illustrating a configuration of a modified example of the embodiment of the present invention.
FIG. 9 is a diagram illustrating a conventional technique.
[Explanation of symbols]
1 Substrate 2, 12, 18 Convex lines 3, 6, 9, 14, 17 Print image lines 4, 7, 10, 15 Anti-counterfeit printed matter 5, 8, 11, 16, 21 Moire pattern 13 Print area 19 , 20 Print image line group

Claims (5)

The substrate and the same color or transparent convex line screen is formed substrate surface, a plurality of parallel line-like print image lines of a color which is a color element of the color image, and intersecting the convex ten thousand lines Consists of
One of the convex line and the line-shaped printed image line is formed by curved lines each having a different amplitude,
The other is a forgery-proof printed matter formed by any of straight lines, curved lines, and curved lines each having a different amplitude,
The anti-counterfeit printed matter is characterized in that a moiré pattern having a rainbow color is visible only when observed obliquely with respect to the printing surface of the substrate. On the surface of the base material on which a plurality of lines of printed image lines of a plurality of colors, which are color elements of a color image, are printed, a convex line of the same color as the base material or a transparent convex line intersects with the printed image lines. ,
One of the convex line and the line-shaped printed image line is formed by curved lines each having a different amplitude,
The other is a forgery-proof printed matter formed by any of straight lines, curved lines, and curved lines each having a different amplitude,
The anti-counterfeit printed matter is characterized in that a moiré pattern having a rainbow color is visible only when observed obliquely with respect to the printing surface of the substrate.   2. The forgery-preventing printed matter according to claim 1, wherein the convex lines are formed by embossing, intaglio printing, or scoring.   The anti-counterfeit printed matter according to claim 2, wherein the convex line is formed by embossing or intaglio printing.   5. The forgery-preventing printed matter according to claim 1, wherein the printed image line is printed with three color inks of yellow, magenta and cyan.

Images