JP3472966B2 - Anti-counterfeit paper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to anti-counterfeit paper for preventing forgery due to color copying.

[0002]

2. Description of the Related Art As is well known, forgery of important documents has become a problem as the accuracy of color copiers has improved, and many inventions relating to printed matter have been proposed to prevent such problems.

[0003]

SUMMARY OF THE INVENTION According to the present invention, even when the shape and configuration of the basic pixel is one, even when the color copying machine is used for copying, the camouflage action is released, and the chameleon or the chameleon that changes the color and pattern of the skin is obtained. An object of the present invention is to provide a new type of anti-counterfeit paper in which the color of the anti-counterfeit part of the base paper changes when copied, like fish.

[0004]

The present invention has been made to solve the above problems. The first invention uses a plurality of colors on at least a part of the surface of the base paper and is a mixed color with the naked eye. A group of minute base pixels that are recognized by each of the base pixels is arranged, and each base pixel is composed of divided pixels divided by the number of used colors or more, and the divided pixels are divided pixels of the main dividing unit and divided pixels other than the main dividing unit. A forgery prevention unit in which a color different from that of the divided pixels of the main division unit is assigned to the divided pixels other than the main division unit, and the divided pixel color of the main division unit of each base pixel is the same base pixel. The printed matter on which the color component area ratio of the area of the main divided portion and the area of the divided pixels of each color other than the main divided portion is approximately 1: 1 in one basic pixel of the basic pixel group, In addition, the divided pixels of the main dividing section have an area structure having a size that allows reproduction by copying, Dividing pixels other than parts are falsification paper which is characterized in that the area configuration having a non-renewable dimensions copies.

[0005] The second invention is a counterfeit prevention unit arbitrarily partitioned, to fill one of the compartments zone group pixels with one color used as the color of the divided pixels in the main division unit, 2. The anti-counterfeit paper according to claim 1, wherein the color of the divided pixel of the main divided portion of the base pixel used in the other portion of the division zone is set to another color in the used color.

According to a third aspect of the present invention, in the first or second aspect of the present invention, at least a part of the forgery prevention portion of the base paper or the entire base pixel is arranged by changing the arrangement pitch so that the density changes. A pattern to form a camouflage effect, or a method to increase the contrast of the divided pixels of the main division by forming gradations or continuous gradations due to changes in density that are arranged with different arrangement pitches. The anti-counterfeit paper is characterized by being associated with one or a combination thereof.

According to a fourth aspect of the present invention, in the first to third aspects, at least a part of or the entire base pixel of the counterfeiting prevention portion of the base paper is arranged such that the base pixels have different sizes. A method of forming a pattern by changing the size to bring about a camouflage effect, and arranging different sizes of the base pixels to form gradations or continuous gradations depending on the change in size, which brings about the effect of being compatible with all copying machines. The anti-counterfeit paper is related to any one of the tightening methods or a combination thereof.

[0008]

In the forgery prevention sheet according to the first aspect of the present invention, the color of the forgery prevention portion visible to the naked eye changes when a copy is made to inform that it is a copy.

When copying the anti-counterfeit paper according to the second aspect of the present invention, when copying, the color of each section zone of the forgery prevention section visible to the naked eye changes, and each section zone becomes different in color, and the difference in contrast due to the color difference. Or, a pattern is generated to inform that the copy is a copy.

The anti-counterfeit paper according to the third and fourth inventions can be applied to any copying machine or copy density adjustment of any copying machine.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the first invention, where Q is a forgery prevention section provided on a base paper P, and this forgery prevention section Q is a group of basic pixels as illustrated in FIG. Buried.

FIG. 2 shows an example of the structure of a base pixel.
When three colors are used, the number of colors may be three or more.

In the example of [I] in FIG. 2, one side of the outer shape X1 is a.
The base pixel (a) formed into a square of 1 is divided into three as shown in the figure, and the width of b1 of the divided pixels in the main divided portion is set to be twice the width of b2 of the divided pixels other than the main divided portion to obtain the width of b1. Is a cyan C, the width of b2 is a yellow Y, the cyan C is an area configuration having a size that can be reproduced by copying, and the yellow Y part is an area configuration having a size that cannot be reproduced by copying. It is what

The example [II] is the same as the example [I] in that the outer shape X1 is a square, but the area of the basic pixel (a) has a size such that the inside can be reproduced by copying. In addition to the above structure, the color is cyan C, the contour is an area structure having a size that cannot be reproduced by copying, and the color is yellow Y.

Further, in the examples [III] and [IV], the outlines X2 and X3 are triangular and circular, and the color arrangement is the same as in the case of [II].

The forgery prevention section Q filled with the basic pixel (a) thus constructed looks like a mixed color green before copying, but when copied, the forgery prevention section Q of the copy is cyan C. The color changes to indicate that it is a copy.

Even if a part of the forgery prevention section is used as shown in the embodiment of FIG. 1, the whole is the same even if it is filled with the base pixel (a) as the forgery prevention section. The configuration of the case forming the base pixel in three or more colors are similar, the main color arrangement area ratio of the area of the dividing portion and the area of the same color divided pixels other than the main dividing section approximately 1: 1, and Anti-counterfeit paper having the same effect by making the divided pixels of the main division part have an area structure having a size that can be reproduced by copying and the divided pixels other than the main division part having an area structure that cannot be reproduced by copying. Is obtained.

The shape of each basic pixel used here may be any figure (circle, triangle, quadrangle, etc.) as long as it is a size that can be visually recognized as a mixed color, and it is not the same shape. However, the same shape is more preferable.

FIG. 3 shows a base paper P when the second invention is applied.
1 shows an example of how to provide the 1 division zone, [I] is the one in which the A zone and the B zone are arranged in a checkered pattern,
In [II], the warning parts are arranged in the A1 zone to the A4 zone, and the remaining B zone is used as the background part.

FIG. 4 shows an example of various kinds of basic pixels in which two colors of basic pixels (a) and (b) which can be used in the embodiment to which the second invention is applied are respectively arranged. 2 shows the shape and configuration example of the base pixel when cyan C and yellow Y are used, for example. In the embodiment, the base pixel (a) is A and A1 of the base paper P1 or P2 of FIG.
Although it is used for the A4 zone and the basic pixel (b) is used for the B zone, it may be used in reverse.

In the example [I] of FIG. 4, similar to the above-described embodiment, the base pixel (a) is formed by using the base pixels (a) and (b) in which the outer shape X1 is a square having one side a1. As shown in the drawing, the width of b1 of the divided pixels of the main division is set to be twice the width of b2 of the divided pixels other than the main division, the width of b1 is cyan C, and the width of b2 is Yellow Y
The cyan C portion has an area structure having a size that can be reproduced by copying, and the yellow Y portion has an area structure having a size that cannot be reproduced by copying. Further, the basic pixel (b) is divided in the same manner as the basic pixel (a), the arrangement of cyan C and yellow-Y is arranged opposite to the basic pixel (a), and the same color as the basic pixel (a) is recognized with the naked eye. It is supposed to be done.

The example [II] is the same as the example [I] in that the outer shape X1 is a square, but the configuration of the basic pixel (a) has a size such that the inside can be reproduced by copying. In addition to the area configuration, the color is cyan C, the contour portion has an area size that cannot be reproduced by copying, the color is yellow Y, and the basic pixel (b) is cyan C and yellow as in the example of [I]. The arrangement of Y is arranged opposite to the base pixel (a) so that it can be recognized by the naked eye in the same color as the base pixel (a).

The examples [III] and [IV] are the cases where the outer shapes X2 and X3 are triangular and circular with the same size.
The color scheme is the same as in the case of [II].

The base pixel (a) configured as described above,
When the base paper P1 is divided as shown in [I] of FIG. 3 by using (b), printing is performed so that the A zone is filled with the base pixel (a), and the B zone is filled with the base pixel (b). To print. When the base paper P2 is partitioned as shown in [II] of FIG. 3, printing is performed so that the A1 to A4 zones are filled with the base pixel (a) and the B zone is filled with the base pixel (b). Printing to fill up with this includes the case where the basic pixels are arranged in a matrix like a mesh, the case where they are arranged closely, the case where they are arranged closely in one direction, and the case where they are printed at intervals in the other direction. It is a waste.

In this case, when the base paper P1 printed by making the relative color constituting areas of the base pixels (a) and (b) the same is seen with the naked eye, it looks like a green uniformly. In the copy, the checkered pattern in the divided zones A and B is made clear by the difference in the color contrast of the A zone and the B zone, and the copy is informed.

When the base paper P2 is copied by a color copying machine, the base paper P1 looks like a uniform green as in the case of the base paper P1, whereas the copy A1 is used.
~ The A4 zone part develops a color different from the B zone part, indicating that it is a copy.

In each of the embodiments described above, two colors are used, the basic pixel (a) is divided by color, and one of them has an area structure having a size that can be reproduced by copying. The basic pixel (b) is divided in the same manner as the basic pixel (a), and the color configuration is arranged opposite to that of the basic pixel (a). The same effect can be obtained by arranging as a mixed color of the used colors without dividing as in (a).

The shape of each basic pixel may be any figure (circle, triangle, quadrangle, etc.) as long as it can be identified by the naked eye as a mixed color. Is more preferable.

In addition, the basic pixels are reproduced not only between the basic pixels having the same color configuration of the main dividing section but also between the basic pixels having different color configurations of the main dividing section by copying the divided pixels to be the main dividing section. The dimensional difference between the possible size and the size that cannot be reproduced by copying the divided pixels other than the main divided portion is “the size that can be reproduced by copying the divided pixels of the main divided portion> the copy of divided pixels other than the main divided portion. Must be of non-reproducible dimensions.
In other words, if the original looks unpatterned and has a uniform color with the naked eye, the original is unmarked with the naked eye unless the color configuration area ratio between the base pixels having different color configurations of the main divisions is approximately 1: 1. Because it does not look like a uniform color.

[I] of FIG. 5 shows an example of the structure of the base pixels (a), (b) and (c) when three colors are used. Application of the example of [II] in the embodiment of FIG. Is.

That is, in this case, the central first division α
Is an area structure having a size reproducible by copying, and the annular second dividing part β and the third dividing part γ provided outside thereof have an area structure having a size that cannot be reproduced by copying. Using the basic pixels (a), (b), and (c) of the types, the first divided portion α of the basic pixel (a) is cyan C, the second divided portion β is yellow Y, and the third divided portion γ−. Is magenta M, and the base pixels (b) and (c) have different color arrangements as shown.

[II] of FIG. 5 shows the size of each divided portion. For example, the base paper P3 is divided into A, B and C as shown in FIG. Copying is performed by printing so that the section A is filled with only the base pixel (a), the section B is filled with only the base pixel (b), and the section C is filled with only the base pixel (c). If done, base paper P
3 was seen as a mixed color of cyan C, yellow Y, and magenta M with the naked eye, but in the copy, the central part of each basic pixel is reproduced, and the other parts are not reproduced. There is a difference in color contrast between them, and a checkered pattern appears, indicating that it is a copy.

FIG. 7 shows an example of the structure of the base pixels (a), (b) and (c) in another embodiment when three colors are used. Each base pixel (a), (b), (C) is α1,
5 divided into β1, β1, γ1, γ1 and β1 and γ
1 is arranged on both sides of α1, and the areas of β1 and γ1 are halved of the area of α1.

In the color arrangement of the basic pixel (a), the α1 portion is cyan C, β1 and β1 are magenta M, and γ is
1, γ1 is set to yellow Y, and α is set in the basic pixel (b).
Part of the color is yellow Y, and α1 for the base pixel (c).
The part is magenta M, and β1 and γ1 are respectively colored with other colors.

The base pixel (a) thus configured,
(B) and (c) are cyan C, yellow Y, and magenta M.
However, if the zone A in FIG. 5 is filled with the base pixel (a), the zone B is filled with the base pixel (b), and the zone C is filled with the base pixel (c). ,
The base paper is recognized by the naked eye as a uniform color with no pattern, but a checkered pattern appears on the copy, which makes the copy aware.

Although the embodiments in which two colors and three colors are used have been described above, it is obvious from the above description that the same effect can be obtained with four or more colors.

Further, as can be easily understood from the second embodiment, the same effect can be obtained by using a plurality of base pixels in which the used colors are divided and arranged and a base pixel composed of a mixed color of the used colors in combination. Anti-counterfeit paper with is obtained.

Further, in order to be compatible with all color copying machines, a publicly known method of changing the density in a slanted manner so as to blur the printing density (rainbow printing) or a combination of a camouflage pattern is used. It is effective to superimpose conventional techniques such as a forming method.

For example, as a method of arranging the basic pixels, a method of arranging with a different arrangement pitch to form a pattern due to a change in density to bring about a camouflage effect, a method of arranging with a different arrangement pitch and a gradation or continuous gradation due to a change in density To create the effect of increasing the contrast of the main divided pixels, the method of creating a camouflage effect by forming patterns by changing the size of the basic pixels and changing the size of the basic pixels, the size of the basic pixel A base pixel that can be obtained by applying any one of the methods that are arranged differently and form gradations or continuous gradations due to the change in size to bring about the effect of being compatible with all copying machines, or a combination thereof. A more effective appearance can be obtained by applying the arrangement method of.

When the base pixels having the same shape and area are used, for example, if the base pixels are arranged regularly at the same pitch, the same effect as that of a flat mesh (the entire surface looks like a uniform pattern) can be obtained. It is obtained, and if it is arranged according to a certain law, it looks like it was camouflaged, and
It is also possible to influence the gradation (gradation due to changes in density).
Also, if the shape of the basic pixel is a deformed figure, it seems that camouflage has been applied even if it is regularly arranged at the same pitch, and if it is arranged based on a certain law, a further camouflage effect can be obtained. Also, the gradation can be changed (gradation due to change in density). (Method (a))

When base pixels having different shapes and the same area are used, even if the base pixels are arranged regularly at the same pitch, it looks as if camouflaging has been performed, and a certain law is applied. If it is arranged based on the above, a further camouflage effect can be obtained, and the gradation can be influenced (the gradation due to the change of the density). ((B) method)

When basic pixels having the same shape but different areas are used, the basic effect is substantially the same as that of the method (a), but the same effect as the state of the flat screen (the pattern is completely blank The printed matter has a gradation on the entire surface (gradation due to a change in the size of the base pixel) rather than the appearance. Alternatively, a new pattern (may be camouflage) can be formed by using two or more types of basic pixels having different areas.
(Method of (C))

Further, by combining the method (a) and the method (c), it is possible to partially bring about gradation (gradation due to a change in the size of the base pixel).

When a basic pixel having a different shape and area is used, the basic effect is substantially the same as the method (b), but not only the gradation due to the change in density but also the size of the basic pixel is used. The printed matter has gradation due to the change in the height. Alternatively, a new pattern (may be camouflage) can be formed by using two or more types of basic pixels having different areas.
(Method of (d))

By combining the method (b) and the method (d), it is possible to partially bring about gradation (gradation by changing the size of the base pixel).

The certain law referred to here is that the arrangement pitch of the base pixels is not a repetition of the same pitch but is partially or wholly changed, and the continuity of the pattern and gradation at the boundary of each divided zone. It is to arrange so as to bring about.

Further, the camouflage effect can be brought about by randomly changing the arrangement pitch of the base pixels in micro units.

Further, by gradually narrowing the arrangement pitch of the base pixels in micro units in one direction, it is possible to bring about gradation due to changes in density.

[0049]

As described above, according to the first aspect of the present invention, the forgery prevention unit filled with the base pixels changes the color when copying with a color copying machine and informs that it is a copy. Anti-counterfeit paper is obtained.

According to the second invention, the base paper of the original is recognized by the naked eye in a uniform color, but when the copy is made by the color copying machine, the color of the copy changes and the division zone is provided. It is possible to obtain a new type of anti-counterfeit paper in which a pattern or a warning pattern according to the person becomes apparent.

Further, according to the third and fourth inventions, the first
And a new type of anti-counterfeit paper is obtained which makes the second invention more effective.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the first invention.

FIG. 2 is a diagram showing a configuration example of a base pixel used in the embodiment of the first invention.

FIG. 3 is a plan view showing an example of how to divide the base paper in the embodiment of the second invention.

FIG. 4 is a schematic diagram showing an example of the configuration of various basic pixels that can be used for implementing the second invention when two colors are used.

FIG. 5 is a diagram showing an example of a base pixel that can be used for implementing a second invention when three colors are used.

FIG. 6 is a schematic diagram showing an example of division of a base paper when three colors are used.

FIG. 7 is a schematic diagram showing an example of the configuration of another base pixel that can be used for implementing the present invention when three colors are used.

[Explanation of symbols]

P, P1-P3 base paper A, B division zone X1-X3 outline (A), (b), (c) Base pixel

Claims (4)

(57) [Claims] 1. A fine base pixel group, which uses a plurality of colors and is recognized by the naked eye as a mixed color, is arranged on at least a part of the surface of the base paper, and each base pixel is divided into more than the number of used colors. The divided pixel is divided into a divided pixel of the main divided portion and a divided pixel other than the main divided portion, and the divided pixel other than the main divided portion is colored with a color different from the divided pixel of the main divided portion, and a printed matter anti-counterfeit part divided pixel color of the main dividing unit is configured with the same groups of pixels of the proviso that each pixel is applied, Motoga
In one group the pixels of the pixel group, ho color arrangement area ratio between the area of the divided pixel of each color other than the area the main division of the main division portion
1: 1 and the divided pixels of the main divided portion have an area configuration having a size that can be reproduced by copying, and the divided pixels other than the main divided portion have an area structure that has a dimension that cannot be reproduced by copying. Anti-counterfeit paper. Wherein optionally partitioning the counterfeit prevention unit, said to fill the one compartment zone group pixels with one color used as the color of the divided pixels in the main division portion, of the partition zone The anti-counterfeit paper according to claim 1, wherein the color of the divided pixel of the main divided portion of the base pixel used for the other portion is set to another color among the used colors. 3. A method for arranging at least a part or the whole of the forgery prevention portion of the base paper for forming a pattern due to a change in density by arranging the base pixels with different arrangement pitches, resulting in a camouflage effect. A base pixel which can be obtained by any one of or a combination thereof, which is arranged with different pitches to form gradations or continuous gradations due to a change in density and which has the effect of enhancing the contrast of the divided pixels of the main dividing portion. The anti-counterfeit paper according to claim 1 or 2, wherein the anti-counterfeit paper is subjected to the arranging method described above. 4. The method of arranging at least a part of or the whole of the counterfeiting prevention portion of the base paper, wherein the sizes of the base pixels are different from each other, and a pattern is formed due to the change in the size, resulting in a camouflage effect. It can be obtained by any one of or a combination of the method and the method in which the size of the base pixel is arranged differently and gradations or continuous gradations due to the change in size are formed to bring about the effect of being compatible with all copying machines. The anti-counterfeit paper according to any one of claims 1 to 3, which is provided with a method of arranging basic pixels.