JPH07137492A - Printed matter - Google Patents

Abstract

PURPOSE:To provide a printed matter which can take effect of checking effectively to copy of an evil intention and is formed into a various pattern. CONSTITUTION:A pattern whose dissolution capacity levels by a copying machine are different from each other are used as a copy checking pattern to be formed on a printed matter, for example, a gradation is provided on distances between half-tone dots and lines or a thickness of parallel lines and a distance between the myriad lines of a screen tint. Therefore, since a copy checking pattern is copied into a different form by a dissolution level of the copying machine, discrimination that it is a copied matter can be performed easily. The copy checking pattern is printed by multi-color printing for which a plurality of colors are used, for example, rainbow printing allowing to express a mixed part 2b by mixing up a red 2a and blue 2c with each other or stuck- printing and a copy checking function can be displayed to the various copying machines whose optical properties are machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed matter having a copy restraint pattern for intentionally invalidating malicious copying / counterfeiting by a copying machine.

[0002]

2. Description of the Related Art As the resolution (resolution or resolution) and color reproducibility of a copying machine are improved, various printed materials can be finely copied. On the other hand, the misuse of printed matters such as cash vouchers, securities such as titles, important documents such as titles, etc. by copying becomes a problem.

In order to prevent such abuse, various attempts have been already proposed to make it difficult to copy printed matter. For example, Japanese Unexamined Patent Publication No. 53-142237 comprises a flat screen background pattern having a narrow pitch, for example, 133 lines / inch, and a flat screen latent image pattern having a wide pitch, for example, 65 lines / inch. While the camouflage pattern is combined with the copy restraint pattern to make the latent image pattern difficult to see, when this is copied, the halftone dots that form the background pattern with a narrow pitch are not copied, but a latent image pattern with a wide pitch is formed. The halftone dots are copied to reveal the pattern, and a technique intended to restrain malicious copying is disclosed.

[0004]

However, since the above-described conventional copy restraint system uses a single color, the copy restraint function may not be effectively exhibited depending on the printing color used depending on the optical characteristics of the copying machine. is there.

Further, the performance of the copying machine is remarkably improved, and the resolution thereof is greatly improved. Since the resolution level of the copying machine varies depending on the model, when copying is performed by the copying machine of various resolution levels. Also, there is a demand for printed matter that can effectively exhibit the copy restraint function.

In order to achieve the above-mentioned object, an object of the present invention is to provide a printed material on which various patterns are formed. Another object of the present invention is to provide a printed matter that can effectively exhibit a copy restraint function without being affected by the optical characteristics of a copying machine. A further object of the present invention is to provide a printed matter having a copy restraining pattern in which the copy restraining function effectively works even with a copying machine having various characteristics or for improving the performance of the copying machine. .

[0007]

In order to achieve the above-mentioned object, the printed matter of the present invention is printed with at least two colors of a copy restraint pattern which is slightly difficult to see and appears when copying. This color has the same color but different density.
Different colors are acceptable. Further, the printed matter of the present invention may be printed by changing the density in an inclined manner so that the adjacent portions of the two types of colors are blurred. Further, a plurality of the copy restraint patterns may be used and printed in different colors. Further, the constituent elements forming the copy restraint pattern may be formed in different colors.

Preferably, in the printed matter of the present invention, the copy restraint pattern includes at least two patterns formed by using a plurality of halftone dots or lines, and the pitch of the flat nets or lines forming the pattern is , The patterns are formed with gradation so that the resolution levels by optical copying are different from each other, or the intervals between adjacent halftone dots or lines forming the pattern are different for each pattern, The pattern is formed by changing the size of halftone dots or the thickness of lines in the pattern in a slanted or stepwise manner. The printed matter is printed with the color density changed stepwise or slantedly in response to the change. Further, it may be combined with a camouflage pattern to make it difficult to visually recognize these copy restraint patterns.

[0009]

In the printed matter of the present invention, since the copy restraint pattern is formed by using at least two kinds of inks of plural kinds having different optical characteristics, it is possible to obtain various optical characteristics of various copying machines, specifically, printing colors. It can respond to the sensitivity and can exert the copy check function.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. The printed matter of the first embodiment is a so-called rainbow print in which a copy check pattern having a gradation as described later is composed of printed portions of two different colors shown below, and the density is changed in an inclined shape so that adjacent portions are blurred. Is printed by. In the printed matter of the present embodiment, since the copy restraint pattern is formed by rainbow printing, the gradation possessed by the copy restraint pattern is camouflaged, and the copy restraint function is also exhibited by the rainbow printing itself. That is, when this printed matter is copied by a color copying machine, the blur generated in the copy restraint pattern due to rainbow printing appears in a different color from the original color according to the sensitivity of the color copying machine to the color, and is a duplicate by visual inspection. It is possible to determine whether or not.

FIG. 1A is a color distribution diagram in the case where a copy restraint pattern is printed on the printed material of this embodiment by rainbow printing. FIG. 1B is a diagram for explaining the densities in the direction from the line C-C to the upper end and the lower end in the color distribution diagram shown in FIG. Color distribution 2 by rainbow printing
Has a red color 2a on the left side, a blue color 2c on the right side, and a mixed color 2b in which the red color 2a and the blue color 2c are mixed in the center.
The printed matter of this embodiment has a copy restraint pattern, which will be described later,
Red ink flows in from the left side and blue ink flows from the right side, and the red ink and the blue ink are mixed in the vicinity of the center and printed with a color distribution 2 as shown in FIG. In the mixed color 2b in FIG. 1A, the density of blue increases from the red 2a to the blue 2c by visual observation as shown in FIG. 1C by changing the mixing amount of the red ink and the blue ink. Then, it is visually recognized that the density of red increases from blue 2c to red 2a. The ink color combination described above can be appropriately selected in consideration of the optical characteristics of various copying machines, and red and blue are preferably used. The number of ink colors mixed in may be two or more. Further, by combining these colors with a transparent ink (medium ink or the like), it is possible to provide a density gradient of only a single color.

The above-mentioned printing using a plurality of colors is performed by using one plate, but if two or more plates are used, the color is changed for each pattern of a plurality of copy restraint patterns. You can also create different configurations. A plate is prepared for each pattern, and they are overprinted using different colors. At this time as well, as in the case of using the same plate, the printing color to be used is appropriately selected in consideration of the optical characteristics of various copying machines, but compared to the same plate, the color used as a printed matter, the pattern to be formed, etc. There is no big restriction.

The copy restraint pattern formed on the printed matter by using the above-mentioned printing will be described below. FIG. 2A is a diagram for explaining the pattern 30 for restraining copying. Figure 2
As shown in (A), the pattern 30 is composed of patterns 31a to 31f using flat meshes having different numbers of lines per inch and halftone dot sizes. "Hiranet" is
It is composed of halftone dots with the same line spacing and halftone dots of the same size. In addition, the flat nets forming the patterns 31a to 31f are formed in synchronization with each other, and the patterns 31a to 31f are formed.
It cannot be easily visually identified that f is composed of a flat screen having different gradations.

FIG. 2B shows a pattern 31 of a portion along the line YY of the copy restraint pattern 30 shown in FIG.
FIG. 2C is a diagram showing the number of halftone dots per inch of the flat screen constituting a to 31f, and similarly, FIG. 2C is a diagram showing the size of halftone dots of the flat screen. As shown in FIG. 2B, the number of mesh lines per inch increases from the inner pattern 31a to the outer pattern 31f, that is, the interval between the mesh lines decreases. In addition, as shown in FIG.
The size of the halftone dot decreases from 1a toward the outer pattern 31f.

FIG. 3 illustrates a flat screen forming patterns 31a to 31f, respectively. As shown in FIG. 3, the patterns 31a to 31f are composed of halftone lines 33a to 33f which are two-dimensionally formed at the same intervals, and halftone dots 32a to 32f which are formed to have the same size. Pitch (line spacing) of the mesh lines 33a to 33f P100, P85, P70, P55,
P40 and P25 are, for example, 50 lines / inch (or DPI: Dot Per Inch), 75 lines / inch, 100 lines / inch, 125 lines / inch, 150 lines / inch, respectively.
Inches, 175 lines / inch.

The halftone dots 32a to 32f correspond to the patterns 31a to 31f.
All patterns 31f so that 31f are synchronized respectively.
halftone dots 32a existing in the same size range of a to 31f
Net wire 33a such that the total area of 32f is almost equal
It has an area corresponding to the pitch of 33 f. For example, the total area of the halftone dots 32a existing within the predetermined range of the pattern 31a is equal to the total area of the halftone dots 32b existing within the predetermined range having the same size as the pattern 31a of the pattern 31b. Therefore, in the patterns 31a to 31f, the pitch of the mesh lines 33a to 33f becomes shorter from the pattern 31a to the pattern 31f, so that the areas of the halftone dots 32a to 32f also become smaller accordingly.

As described above, the printed matter has patterns 31a ...
Since 31f is formed so as to be “tuned”, it is not visually recognizable that the flat meshes forming the patterns 31a to 31f are composed of different mesh lines 33a to 33f and halftone dots 32a to 32f. No, but difficult to identify.

The size of the halftone dots 32a to 32f illustrated in FIG. 3 determines the degree of discrimination corresponding to the resolution level of the copying machine. Here, for example, 32e, 32
f is a size that cannot be identified even at the resolution level L1 of the highest-performance copying machine, and halftone dots 32a and 32b are sizes that can be identified at the resolution level L3 of the copying machine, which is the lowest resolution level, halftone dots 32a, 32b, and 32c. Is a size that can be identified by the resolution level L2 of a standard copying machine.

FIGS. 4A to 4C respectively show copies obtained by copying the above-mentioned pattern print 30 for restraint of copying by the copying machines having the resolution levels L3, L2 and L1.
The shaded portions in FIGS. 4A to 4C represent the copied portions. As shown in FIG.
When copying is performed by a copying machine having a resolution level L3, the copying machines cannot identify and reproduce halftone dots 32c to 32f having a resolution level L3 or less, and therefore the patterns 31a and 31b.
Only the outer patterns 31c to 31f are not copied. Therefore, when copying with a copying machine of this resolution level L3, it is easy to visually distinguish the copy from the real one, and it is effective as a copy restraint pattern.

As shown in FIG. 4B, the resolution level L
When copying is performed by the second copying machine, since the halftone dots 32d to 32f having the resolution level L2 or less cannot be reproduced by the copying machine, only the patterns 31a to 31c are copied and the outer patterns 31d to 31f are not copied. Therefore, even when the image is copied by a copying machine of this resolution level L2, it can be easily visually discriminated and it is effective as a copy check pattern.

As shown in FIG. 4C, the resolution level L
When copying is performed by one copying machine, the copying machines cannot reproduce halftone dots 32e and 32f having a resolution level of L1 or lower, and further, an eye for identifying a different halftone dot for each copying machine (the black portion of the halftone dot is 1 However, depending on the fineness of the identification standard for discriminating the other portions from 0), the halftone dots having a small size are crushed, and the patterns 31a to 31d are copied almost solidly, and the outer patterns 31e and 31f are not copied. Pattern 31
When the distance between f and the pattern 31d is very short, it is not always easy to visually identify that the outer patterns 31e and 31f are not copied, but as described above, the high-density copy In, the solidly copied portion can be identified as having different sharpness from other copied portions. In addition, the size of the shape of the copied portion is accurately measured using a measuring instrument or the like, and the halftone dot 3 of the copied portions 31a to 31d is used using a magnifying glass or the like.
If the shapes of 2a to 32d are inspected, since the halftone dots 32a to 32d that should be present do not retain the shape which is crushed horizontally or the shape of the halftone dots, it is possible to sufficiently identify the copy.

Further, the copied patterns 31a to 31d shown in FIG. 4C are the pattern 3 in the printed matter.
The size of the halftone dots 32a to 32d of 1a to 31d is the halftone dot 32.
Since it becomes larger from d toward the halftone dot 32a, there is a tendency to be clearly copied from the pattern 31d toward the pattern 31a. Therefore, in the printed matter, since the patterns 31a to 31f are synchronized, it is difficult to visually recognize that the gradations of the patterns 31a to 31f are different, but when the patterns 31a to 31f are copied, the difference in gradation is clear. Since it appears as a difference in degree, it can be easily identified as a copy.

The printed matter having the above-mentioned copy restraint pattern effectively exhibits the copy restraint function even in a color copying machine or a monotone copying machine having various resolutions. In the future, a copying machine having a resolution higher than the resolution level L1 may appear. In this case,
The hatched line shown in the copy portion shown in (C) spreads further outward, but it is easy to distinguish it from the real product because of the difference in sharpness of the copied pattern. Further, if the copied portion is inspected with a magnifying glass or the like, it can be more accurately discriminated from the genuine article. That is, the copy restraint pattern is configured with gradations so that the resolution levels are different so that it is possible to cope with the case where the resolution of the copy machine is improved by the above-mentioned copy machine. Therefore, it is possible to make the copy restraint effective in the future without changing the pattern of the printed matter. Further, since the copy restraint pattern is formed by printing using two or more kinds of colors having different optical characteristics as described above, it becomes possible to cope with various sensitivities to colors of the copying machine.
The copy restraint function can be effectively exerted. Also. Since the mixed color 2b generated in the copy restraint pattern appears in a color different from the original color according to the sensitivity of the color copying machine to the color, it is possible to visually determine whether it is a duplicate or not. .

The shapes of the halftone dots 32a to 32f shown in FIG. 3 are not limited to circles, but can be various other shapes. For example, as shown in FIG. 5, individual shapes of halftone dots are formed into petal shapes, and gradation is added as shown in FIG. As the petal shapes are close to each other,
Even with a copying machine having a considerably high resolution, when copying, adjacent petals tend to stick together to form a shape close to a circle. Therefore, when the duplicate is inspected with a magnifying glass, it can be identified as the duplicate.

Although halftone dots are used in the above embodiment,
It is also possible to use lines having different gradations. In this case, a copy check pattern using lines is printed by rainbow printing with the color distribution shown in FIG.

Further, the pattern formed on the printed matter is not limited to the above-mentioned one, and other patterns such as characters, symbols and figures may be used.

Further, the colors of the flat meshes or lines forming the patterns may be different among the patterns.

Further, the halftone dots or the lines forming the patterns may be different constituent elements between the patterns, and different colors may be used between the patterns.

Further, the case where the gradation of the flat screen or the parallel lines forming the pattern is sequentially and regularly changed has been exemplified, but the change of the gradation of the flat screen or the parallel line may not be regular. Good.

Further, as the printed matter having the copy restraint pattern of the present invention, the case where a plurality of patterns are synchronized has been exemplified, but the plurality of patterns need not necessarily be synchronized. When synchronized, there is an advantage that it is difficult to identify visually, but since it does not particularly contribute to the copy restraint function, that is, the function of making a difference between the copy and the genuine product, it is necessary to synchronize. Instead, it is only necessary that a plurality of patterns are provided with gradations to form a flat screen or lines having different resolution levels due to copying.

FIG. 6A is a plan view of a copy restraint pattern 72 using halftone dots as another example of the preferred embodiment of the printed matter having the copy restraint pattern of the present invention. The pattern 72 has a background 74 and a rectangular figure 76. The background 74 and the rectangular figure 76 are “plucked”. In FIG. 7, the background 74 and the rectangular figure 76 are adjacent to each other, that is, the part that constitutes the background 74 of the part of the line along both sides of the line Y-Y, that is, the high density portion 43 at the upper end, and the internal intermediate density The portion 42 and the low-concentration portion 41 in the central portion
And the halftone dots of the low density portion 61 at the central portion and the high density portion 62 at the upper end portion that make up the rectangular graphic 76 will be illustrated in detail.

As illustrated in FIG. 7, the background 74 has the same vertical mesh pitch P41 from the low density portion 41 at the center line CC to the high density portion 43 at the upper end, for example, the number of lines is 150 lines / Inch (or DPI: Dot Per Inch)
Are formed by halftone dots 401 to 409. The horizontal mesh pitch P42 is also the vertical mesh pitch P41 in this example.
The same number of lines is 150 lines / inch. The rectangular figure 76 is formed from the low density portion 61 of the center line C-C to the high density portion 62 of the lower end portion in the longitudinal mesh pitch P61, for example, the number of lines is 65 lines / inch and the halftone dots 601 to 603. There is. In this example, the mesh pitch P62 in the horizontal direction is 65 lines / inch, which is the same as the mesh pitch P61 in the vertical direction.
That is, the halftone dot pitch P41 and the halftone dot pitch P42 of the halftone dots 401 to 409 that form the background 74 are narrow, and the halftone dot pitch P61 of the halftone dots 601 to 603 that form the rectangular graphic 76.
And the mesh pitch P62 is wide, and the background 74 and the rectangular graphic 7 are
The mesh pitch is different from that of No. 6.

Center line C--C toward both sides of line Y--Y
The areas of halftone dots 401 to 409 increase from one to the upper end of the background 74, and the areas of halftone dots 601 to 603 increase from the center line C-C position to the upper end of the rectangular graphic 76. There is. In order to make it difficult to visually distinguish the background 74 and the rectangular figure 76, they may be “tuned”. That is, for each certain unit area of the background 74 and the rectangular graphic 76, the total area (area ratio) of the halftone dots contained therein may be substantially the same for the background 74 and the rectangular graphic 76. For that purpose, a rectangular figure 76 having a large mesh pitch is used.
Each of the meshes forming the is formed larger than the area of each halftone dot of the adjacent background 74. In this example,
The background 74 has a line number of 150 DPI, and the rectangular figure 76 has a line number of 65.
Since it is DPI (however, for the sake of illustration, in FIG. 7, the halftone dot pitch P41 and the halftone dot pitch P61 are about 1: 1.5), the halftone dots of the rectangular figure 76 are to be synchronized. The area of the halftone dots that form the adjacent background 74 (150/6
5) Multiply by ² 4.6. The diameter of the halftone dot of the rectangular graphic 76 is about twice as large as that of the halftone dot forming the adjacent background 74.

The halftone dot pitch P61 of the rectangular figure 76 is used as the background 7
If it is larger than the halftone dot pitch P41 of 4, the rectangular figure 76
Since the size of one halftone dot forming the image is larger than the halftone dot forming the background 74, the rectangular figure 76 appears more clearly when copied. In the original print, a rectangular figure 7
6 is in synchronism with the background 74, that is, it blends into the background 74 and the rectangular graphic 76 is difficult to visually identify, but when copied, it clearly appears, so it is easy to identify it as a copy. Can be identified.

By changing the size of the above-mentioned halftone dots in a slanted or stepwise manner, as shown in FIG. 6B as the density curve CV4 of the background 74 and the density curve CV6 of the rectangular figure 76, The density of the background 74 and the rectangular figure 76 is
At the center line C-C position, it is formed so that the density (gradation) becomes higher from the center line C-C toward the end, although the pattern is so small that it is hardly recognized as a pattern. As a result, at the visual inspection, the end portion appears to be a dark color, the end portion appears to be a lighter color toward the center line C-C, and the center line C-C.
The C position appears as the color of the printed matter itself, for example, white.
Moreover, since the background 74 and the rectangular graphic 76 are synchronized with each other in the area ratio of their halftone dots, the rectangular graphic 76 existing in the background 74 appears to be integrated with the background 74. In other words, the background 74 and the rectangular figure 76 can be distinguished from each other by using a magnifying glass or visually when viewed carefully, but in a normal state, the rectangular figure 76 melts into the background 74, and the background 74 and the rectangular figure 76 are separated from each other. It is difficult to easily identify it visually.

The sizes of the areas of the halftone dots 401 to 409 and the halftone dots 601 to 603 illustrated in FIG. 7 cannot be identified by the resolution level L1 of the current latest high-performance copying machine. 403 and a halftone dot 601 and further includes halftone dots 407 to 409 and 603 of an area which can be sufficiently identified by the resolution level L3 of the lowest copying machine. The resolution level L2 indicates a resolution level between the highest resolution level L1 and the lowest resolution level L3.

FIGS. 8A to 8C respectively show copies obtained by copying the above-described copy restraint pattern 72 with a copying machine having resolution levels L3, L2, and L1. In addition,
The hatched portion in FIGS. 8A to 8C indicates a copied portion. However, it is shown as being copied with the same density for the sake of illustration, and in reality, it is reproduced with the reproducibility according to the resolution level of the copying machine, which will be described later, according to the density of the original background 74 and the original rectangular graphic 76. Be copied. As described above, since the rectangular figure 76 is composed of halftone dots having a wider pitch than the background 74, and the background 74 and the rectangular figure 76 are synchronized, in other words, the area of the halftone dots forming the rectangular figure 76 is It should be noted that in the following, the rectangular figure 76 appears more clearly when copied, because it is larger than the area of the halftone dots that form the adjacent background 74.

As shown in FIG. 8A, the resolution level L
When copying is performed by a copying machine of No. 3, halftone dots having a resolution level L3 or lower cannot be identified and cannot be reproduced by the copying machine. Therefore, the copy pattern has a high density portion 43 at the end of the background 74 and a high density of the rectangular figure 76. Although the portion (the portion of the halftone dot 603) is copied, the intermediate-density portion 42 inside the background 74, the low-density portion 41 at the center of the background 74, and the rectangular graphic 7
The middle and low density areas of 6 are not copied. Therefore, when copying with a copying machine of this resolution level L3,
Visually, the difference between the real product and the copied product can be seen, which is effective as a copy check pattern.

As shown in FIG. 8B, the resolution level L
When copying is performed by the second copying machine, halftone dots having a resolution level L2 or lower cannot be reproduced by the copying machine, but the copying pattern is higher than the edge part of the background 74 as compared with the example shown in FIG. The portion to be copied from the density portion 43 toward the inner intermediate density portion 42 is enlarged. Further, the halftone dots of the high density portion (the halftone dots 602 to 603) of the rectangular graphic 76 are reproduced. However, the low density portion 41 at the center of the background 74 and the intermediate density portion and the low density portion of the rectangular graphic 76 are still not copied. Therefore, even a copy made at this resolution level L2 can be visually identified and is effective as a copy check pattern.

As shown in FIG. 8C, the resolution level L
When copied by the first copying machine, the copy pattern is enlarged to the intermediate density portion 42 inside the background 74 and the high density portion 62 at the end of the rectangular graphic 76, but
Still, the low-density portion 41 (40
1 to 403) and the low density portion 61 (601) at the center of the rectangular graphic 76 are not copied. The low-density portion 41 in the center of the background 74 that is not copied and the rectangular graphic 76
The low density portion 61 in the center of the
Also, it is not always easy to visually identify its existence. However, by using a magnifying glass or the like, the shapes of the halftone dots of the high density portion 62 at the end of the rectangular graphic 76 and the low density portion 41 at the center of the background 74 can be accurately identified.
Therefore, if the copied printed matter is inspected using a magnifying glass or the like, there is no halftone dot that should be present, so that it can be easily identified as the copied one.

Further, the copied portion shown in FIG. 8C, the intermediate density portion 42 inside the background 74 and the rectangular graphic 76.
The area ratio of the halftone dots in the fixed area is the same as that of the high-density portion 62 at the end of the, and the mesh pitch is more rectangular than that of the background 74.
Since 6 is larger, the size of one halftone dot is more clearly copied in the rectangular figure 76 than in the background 74. In other words, in the original pattern 72, the background 74 and the rectangular figure 76 are in synchronization, so that the high-density portion 62 at the end of the rectangular figure 76, which is difficult to visually identify, can be easily visually identified by copying. become. That is, even if a copying machine having a high resolution level is used, the above-described copy restraint pattern of the present invention effectively exhibits the copy restraint function.

As described above, the pattern 72 having the above-mentioned copy restraint pattern effectively exhibits the copy restraint function even in a color copying machine or a monotone copying machine having various resolutions.

In the future, a copying machine having a resolution higher than the resolution level L1 may appear. In this case, the slanted line showing the copy portion shown in FIG. 8C is enlarged to the vicinity of the center line CC. However, as described above, the copy portion in the rectangular graphic 76 tends to be copied more remarkably than the copy portion of the greeting 74, so that the copy can be easily identified. In addition, if the copied portion is inspected with a magnifying glass or the like, as described above, it is possible to identify whether or not the copied portion has been copied. That is, the copy restraint pattern having the above-mentioned two types of halftone dot pitches and consisting of halftone dots having a changed area does not change the halftone dot pitch even if the resolution of the copying machine is improved. Even if the copy restraint is effective.

The shapes of the halftone dots 401 to 409 and halftone dots 601 to 603 illustrated in FIG. 7 are not limited to circles, and the shapes shown in FIG.
Can have various shapes such as.

In the above embodiments, the halftone dots are used as the elements constituting the pattern. However, the elements constituting the pattern of the present invention are not limited to the halftone dots, and other elements such as lines may be used. You may use.

Next, a specific example in which a plurality of different colors are printed by using the above-mentioned copy restraint pattern will be described.
FIG. 9A is a diagram for explaining the printed matter 200 of this embodiment. As shown in FIG. 9A, the printed matter 200 includes a background portion 202 formed by a flat screen having 150 lines per inch, and 60 lines per inch arranged in 5 rows and 4 columns. A copy check pattern composed of a latent image portion 204 formed of a flat screen is formed. The latent image portion 204 has a shape corresponding to the character “COPY”. Background part 20
2 and the size of the halftone dots used in the latent image portion 204 are the same in the left-right direction, but from the upper end portion to the lower end portion in the up-down direction substantially orthogonal to the left-right direction as shown in FIG. 9B. It becomes large in a slanted shape. Therefore, visually, the lower end portion of the printed matter 200 is visually recognized in a darker color than the upper end portion. As shown in FIG. 9 (A), the copy restraint pattern has a rainbow that exhibits a color distribution that gradually changes from the left end to the right end, with blue, purple, and red, with a hybrid portion. It is printed by printing. According to the printed matter of this embodiment, the characters "COP" in the latent image portion are printed on the duplicate.
Since “Y” appears, a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Also,
The camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing. Further, by using rainbow printing to form one print pattern with two or more colors, it exerts a copy restraint function even for a copying machine having various optical characteristics, which has hitherto not been effective with a single color. be able to.

FIG. 10 is a diagram for explaining a printed matter 210 according to still another embodiment of the present invention. As shown in FIG. 10, the printed matter 210 includes a background portion 212 formed by a flat screen,
A copy restraint pattern composed of latent image portions 214a to 214e arranged in 5 rows and 4 columns and having a shape corresponding to the character "COPY" is formed. The halftone dots used for the flat screen of the background part 212 and the latent image parts 214a to 214e have different numbers of lines per inch, and the size of the halftone dots is different for each line number, but the area ratio is 20%. It is the same. The flat screen used for the background portion 212 has 60 lines per inch. Latent image parts 214a, 214b, 214c,
The flat screens of 214d and 214e have 160 lines, 140 lines, 120 lines, 100 lines and 80 lines per inch, respectively. The above copy restraint pattern is shown in FIG.
From the left end to the right end as shown in, blue, purple,
Then, it is printed by rainbow printing, which sequentially has a mixed portion and exhibits a varying color distribution with red. According to the printed matter of this embodiment, the characters "COP" in the latent image portion are printed on the duplicate.
Since “Y” appears, a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Also,
The camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing. Further, by using rainbow printing to form one print pattern with two or more colors, it exerts a copy restraint function even for a copying machine having various optical characteristics, which has hitherto not been effective with a single color. be able to. Further, the copy restraint pattern used in this embodiment is formed by the presence of at least two patterns in which the constituent elements are adjacent to each other and have different intervals. Therefore, when printing using a plurality of colors, other than the copy restraint pattern. There are few restrictions on the design of the entire printed matter, such as securing space for printing arbitrary characters and patterns.

FIG. 11 is a diagram for explaining a printed matter 220 according to still another embodiment of the present invention. As shown in FIG. 11, the printed matter 220 has 15 lines per inch.
A background portion 222 formed by a flat screen having 0 lines and a latent image portion 22 formed by a flat screen having 3 lines and 4 columns and having 60 lines per inch
A copy check pattern composed of 4 and 4 is formed.
The latent image portion 224 has a shape corresponding to the character “COPY”. The letters "COPY" are all composed of the same number of lines and halftone dot area ratio. Background part 222 and latent image part 2
The halftone dot area ratios of 24 are all 20% and are invisible and cannot be visually recognized. As shown in FIG. 11, the copy restraint pattern is printed by rainbow printing in which blue, purple, and red are sequentially displayed from the left end portion to the right end portion, and a changing color distribution is exhibited while having a mixed portion. According to the printed matter of the present embodiment, the character "COPY" in the latent image portion appears on the duplicate, so that even a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Further, the camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing.

FIG. 12 is a diagram for explaining a printed matter 230 according to still another embodiment of the present invention. As shown in FIG. 12, the printed matter 230 has 15 lines per inch.
A background portion 232 formed by 0 lines and a latent image portion 23 formed by a flat screen arranged in 3 rows and 4 columns and having 60 lines per inch.
A copy check pattern composed of 4 and 4 is formed.
The lines of the background portion 232 and the halftone dot area ratio of the latent image portion 234 are both 20%, which are in synchronism with each other and cannot be visually recognized. The latent image portion 234 has a shape corresponding to the character “COPY”. As shown in FIG. 12, the copy restraint pattern is printed by rainbow printing in which blue, violet, and red are sequentially arranged from the left end to the right end to have a mixed portion and exhibit a varying color distribution. It In the printed matter of this embodiment, the background portion 232 has lines and the latent image portion 234.
Alternatively, a flat screen may be used. Further, the size of dots or the thickness of lines may be changed step by step for each pattern, or the pitch of dots or lines in each pattern may be changed to make a copy having various resolutions. The copy restraint function for the machine may be effectively exerted. According to the printed matter of this embodiment, the characters "COP" in the latent image portion are printed on the duplicate.
Since “Y” appears, a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Also,
The camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing. Further, by using rainbow printing to form one print pattern with two or more colors, it exerts a copy restraint function even for a copying machine having various optical characteristics, which has hitherto not been effective with a single color. be able to.

FIG. 13 is a diagram for explaining a printed matter 240 as still another example of this embodiment. As shown in FIG. 13, the printed matter 240 has the same background portion 242 and latent image portion 244a as the printed matter 210 shown in FIG.
A copy restraint pattern composed of .about.244e is formed. The area ratios of the flat screen and the halftone dots used for the background portion 242 and the latent image portions 244a to 244e forming the copy restraint pattern are the same as those of the printed matter 210 of FIG. However,
This copy restraint pattern is printed by rainbow printing in which, as shown in FIG. 13, red, purple, and red are sequentially provided from the upper end to the lower end, and a color distribution that has a changing portion and exhibits a varying color distribution is exhibited. It According to the printed matter of the present embodiment, the character "COPY" in the latent image portion appears on the duplicate, so that even a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Further, the camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing. That is, by forming one print pattern with two or more colors having different optical characteristics,
The copy restraint function can be exerted even for a copying machine having various optical characteristics which cannot be obtained by using a single color.

The parts of low density of the constituents are difficult for the copying machine to detect the constituents, but it is more effective to select the printing color so as to be compatible with the copying machines having various optical characteristics. Try to exert the copy restraint function. For example, if a copying machine having a characteristic in which it is difficult to detect red in a portion having a low density is printed in blue, it can be dealt with.

FIG. 14 is a diagram for explaining a printed matter 250 as still another example of this embodiment. 14
As shown in FIG.
A copy check pattern including a background portion 252 and a latent image portion 254 similar to the printed matter 200 shown in FIG. The screens used for the background portion 252 and the latent image portion 254 forming the copy restraint pattern are the same as the printed matter of FIG. 9 (A). However, this copy restraint pattern has a so-called overprinting configuration in which two types of colors, blue and red, are used and monochromatic printing using one color is overlaid on one plate. The size of the halftone dots forming the background and latent image portion of this copy restraint pattern changes from the upper end to the lower end in the vertical direction substantially orthogonal to the horizontal direction in the plate using blue as shown in FIG. 14 (B). In the plate using red, on the contrary, the plate is gradually increased in size from the upper end to the lower end. As a result, it becomes possible to cope with a copying machine having different optical characteristics depending on the model in the low density portion as described above. When two plates are overprinted, if halftone dots of different colors overlap, the color of those parts will change, making it easier to see. Therefore, print the two plates slightly offset so that they do not overlap. To According to the printed matter of the present embodiment, the character "COPY" in the latent image portion appears on the duplicate, so that even a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Further, the camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing. In other words, by forming one print pattern with two or more colors having different optical characteristics, it is possible to exert a copy restraint function even for a copying machine having various optical characteristics which were conventionally not effective with a single color. it can.

As for the above-mentioned printing colors, the example of two-color rainbow printing in which blue and red are combined is used. However, the present invention is not limited to this and, for example, a combination of blue ink and transparent ink may be used. A color scheme with one color is used, for example, a low density portion of a component (for example, 0
%, Where the halftone dots are dark and the density is high (for example, 50
By making the halftone dots around (%) lighter, it is possible to obtain the effect of making the dots look uniform visually and making it difficult to confirm changes in the density of the halftone dots. Also, when these copy restraint patterns themselves appear, they are not rainbow colors that are a mixture of different colors,
It may be composed of two kinds of colors that are the same color but are clearly different in color density and are recognized as different kinds of colors.

FIG. 15 is a diagram for explaining a printed matter 260 as still another example of this embodiment. As shown in FIG. 15, the printed matter 260 includes a background portion 262 and a latent image portion 264a similar to those of the printed matter 210 shown in FIG.
A copy restraint pattern composed of .about.e is formed.
Background portion 262 and latent image portion 2 forming a copy restraint pattern
The area ratios of the flat screen and the halftone dots used for 64a to 264e are the same as those of the printed matter 210 of FIG. However, this copy restraint pattern is formed by printing the left half 260a of the printed matter 260 in red and the right half 260b in blue as shown in FIG. This is a multi-color printing configuration in which two types of colors, blue and red, are used, and one color is printed twice for one plate. The densities of these print colors are increased in a vertical direction that is substantially orthogonal to the left-right direction, and the lower end portion of the printed matter 260 is visually recognized as a darker color than the upper end portion. According to the printed matter of the present embodiment, the character "COPY" in the latent image portion appears on the duplicate, so that even a person who does not know the appearance of the printed matter can recognize the difference between the printed matter and the duplicate. Further, the camouflage function and the copy restraint function are exhibited by the color distribution by rainbow printing. That is, by forming one print pattern with two or more colors having different optical characteristics,
The copy restraint function can be exerted even for a copying machine having various optical characteristics which cannot be obtained by using a single color.

FIG. 16 is a diagram for explaining a printed matter 270 as still another example of this embodiment. As shown in FIG. 16, a copy restraining pattern composed of a background portion 272a and a latent image portion 274a similar to the printed matter 200 shown in FIG. 9A described above is formed in red on 270a in the printed matter 270. A copy check pattern, which is similar to the printed matter 220 shown in FIG. 11 and includes a background portion 272b and a latent image portion 224b, is formed in blue on the carriage 270b. The flat mesh forming the copy restraint pattern in 270a is the same as that of the printed matter of FIG. 9A, and the size of the halftone dot is also gradually increased as shown in FIG. 16B. The area ratio of the halftone dots and halftone dots forming the copy restraint pattern in 270b is the same as that of the printed matter of FIG. In this way, by forming the copy restraint patterns of different methods on one printed matter, even if the design is partially restricted such that the color density is not changed at a specific place of the printed matter, the copy is restrained. It becomes possible to exert the restraint function. In particular, among the above-mentioned copy restraint patterns, as shown in FIG. 2, a copy restraint pattern configured by changing the pitch of the flat screen for each pattern and providing gradations has at least two or more different pitches. Since it can be configured from patterns, it requires less space to form it on the printed matter, and is easy to use even under conditions where there are design restrictions due to arrangement on the printed matter, color density changes, etc. Wide use in combination with patterns is effective.

Further, in the present invention, it is possible to form a printed matter in which a camouflage pattern is combined with the above-mentioned multi-color printing check pattern to make visual recognition of the pattern difficult. FIG. 17 (A)
17B, a background portion 282 using a flat screen and halftone dots similar to that of the printed matter 200 shown in FIG. 9A described above is used by using a white camouflage pattern. A copy restraint pattern 280 composed of the latent image portion 284 is combined. As a result, FIG.
As shown in FIG. 5, the copy restraint pattern is only partially exposed from the white portion of the camouflage pattern, and it is possible to obtain a printed matter in which it is more difficult to visually recognize the copy restraint pattern. As such a camouflage pattern, in addition to the above-mentioned grain pattern, a wavy pattern, a grain pattern,
Various kinds of geometric patterns such as polygons can be applied.

[0057]

According to the printed matter of the present invention, one type or two types are provided.
Since it is composed of printed parts of more than one kind of color and colors with different optical characteristics, it is possible to form by changing the density in an inclined shape so that adjacent parts are blurred, and it depends on the optical characteristics of the copying machine. Therefore, the copy restraint function can be effectively exerted without being restricted by the print color. Further, according to the printed matter of the present invention, the copy restraint function can be effectively exerted on the copying machines having various resolution levels. Further, according to the printed matter of the present invention, various patterns can be printed by adjusting the first pattern and the second pattern, and various copy restraint patterns can be obtained. Further, according to the printed matter of the present invention, the copy restraint function can be effectively exhibited without being affected by the optical characteristics of the copying machine. Further, according to the printed matter of the present invention, if two patterns, that is, a warning character pattern and a background pattern having different resolution levels by a copying machine are formed on the printed matter,
When the duplicate is viewed, the warning character pattern can be visually recognized, and the duplicate can be easily identified from the warning character without knowing the pattern formed on the printed matter.

[Brief description of drawings]

FIG. 1A is a color distribution diagram in the case where a copy check pattern is printed on a printed matter of the first embodiment by rainbow printing, and FIG. 1B is a line CC in the color distribution diagram shown in FIG. FIG. 6 is a diagram for explaining the densities in the direction from to the upper end and the lower end, and (C) is a diagram for explaining the color densities of the mixed colors.

FIG. 2 is a diagram for explaining a pattern for restraining copying, which is formed on the printed matter of the first embodiment, and FIG. 2A is a diagram for explaining formation positions of a plurality of types of patterns;
(B) is a figure for demonstrating the number of lines per inch of each pattern, and (C) is a figure for demonstrating the size of the halftone dot of each pattern.

FIG. 3 is a diagram for explaining types of flat screens that form each pattern shown in FIG.

4A and 4B are views for explaining a copy pattern of the copy restraint pattern shown in FIG. 2 by a copying machine, and FIG. 4A is a view for explaining a copy pattern by a copying machine of a low resolution level. , (B) are diagrams for explaining a copying pattern by a copying machine having a medium resolution level, and (C) is a diagram for explaining a copying pattern by a copying machine having the highest resolution level. .

FIG. 5 is a diagram illustrating another shape of the flat screen.

6A and 6B are diagrams for explaining a printed matter according to a second embodiment, FIG. 6A is a diagram for explaining positions of patterns of different types, and FIG. 6B is a diagram for explaining density of patterns. It is a figure.

FIG. 7 is a diagram for explaining halftone dots that form the printed matter of FIG. 6;

8A and 8B are diagrams for explaining a duplicate of the printed matter of FIG. 6 by a copying machine, FIG. 8A is a diagram for explaining a copying by a copying machine of a low resolution level, and FIG. It is a figure for demonstrating the copy by the copying machine of a medium resolution level, and (C) is a figure for demonstrating the copying by the copying machine which has the highest resolution level.

9A is a diagram for explaining a printed matter according to a third embodiment, and FIG. 9B is a diagram for explaining the size of halftone dots in the vertical direction of the printed matter shown in FIG. 9A. .

FIG. 10 is a diagram illustrating a printed material according to a fourth embodiment.

FIG. 11 is a diagram illustrating a printed material according to a fifth embodiment.

FIG. 12 is a diagram illustrating a printed material according to a sixth embodiment.

FIG. 13 is a diagram illustrating a printed material according to a seventh embodiment.

FIG. 14A is a diagram for explaining a printed matter of an eighth embodiment, and FIG. 14B is a diagram for explaining the size of halftone dots in the vertical direction of the printed matter shown in FIG. 14A. .

FIG. 15 is a diagram illustrating a printed material according to a ninth embodiment.

FIG. 16A is a diagram for explaining the printed matter of the tenth embodiment, and FIG. 16B is a diagram showing the printed material 270 in the printed matter shown in FIG.
FIG. 7A is a diagram for explaining the size of halftone dots in the vertical direction in FIG.

FIG. 17 is a diagram for explaining a printed matter according to an eleventh embodiment, in which (A) is a camouflage pattern with a white grain pattern, (B) is a copy check pattern, and (C) is camouflage shown in (A). It is a printed matter in which a pattern and the copy restraint pattern shown in FIG.

[Explanation of symbols]

2 ... Color distribution of rainbow printing 30, 72, 82 ... Patterns for restraining copying 401-409, 32a-32f, 601-603, 8
p, 98p ... halftone dots 202, 212, 222, 232, 242, 252, 2
62, 272a, 272b, 282 ... Background portion 204, 214a to 214e, 224, 234, 24
4, 254, 264, 274a, 274b, 284 ...
・ Latent image part

Claims (13)

[Claims] 1. A printed matter, characterized in that a copy restraint pattern which is slightly difficult to see and appears when copying is printed in at least two colors. 2. The printed matter according to claim 1, wherein the printed matter is printed in two different colors having the same color but different densities. 3. The printed matter according to claim 1, wherein the printed matter is formed by changing the density in an inclined shape so that the adjacent portions of the two kinds of colors are blurred. 4. The printed matter according to claim 1, wherein the constituent elements of the copy restraint pattern are of different colors. 5. The printed matter according to claim 1, wherein there are a plurality of the copy restraint patterns, each of which is printed in a different color. 6. The printed matter according to claim 1, wherein the copy restraint pattern is composed of a latent image portion and a background portion. 7. The printed matter according to claim 6, wherein both the latent image portion and the background portion in the copy restraint pattern are formed by using halftone dots. 8. The printed matter according to claim 6, wherein one of the latent image portion and the background portion in the copy restraint pattern is formed by using halftone dots, and the other is formed by using lines. 9. The copy restraint pattern includes at least two patterns formed by using a plurality of halftone dots or lines, and the pitch of the flat nets or lines forming the pattern is optical between the patterns. The printed matter according to claim 1, wherein the printed matter is formed with gradation so that the resolution level by copying is different. 10. The copy restraint pattern includes at least two patterns formed by using a plurality of halftone dots or lines, and the intervals between adjacent halftone dots or lines forming the pattern are different for each pattern. 9. The printed matter according to claim 1, wherein the printed matter is formed by changing the size of halftone dots or the thickness of lines in the pattern in a slanted or stepwise manner. 11. The printed matter according to claim 9, wherein the density of the printing color is changed in a direction substantially the same as the direction of the shape change of the constituent elements of the copy restraint pattern. 12. The printed matter according to claim 9, wherein the density of the printing color is changed in a direction substantially orthogonal to the direction of the shape change of the constituent elements of the copy restraint pattern. 13. The printed matter according to claim 1, which is formed by combining the copy restraint pattern and a camouflage pattern that makes it difficult to visually recognize the copy restraint pattern.