JP2019202438A - Forgery preventive printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed matter on which a latent image having continuous gradation appears during copying without being influenced by the resolution of a copying machine such as a color copying machine. According to the present invention, a positive image of a latent image having continuous tone is formed by a first element formed of a first ink reproduced in a copying machine, and a positive image having the same hue as that of the first ink is formed. In addition, a negative image of the latent image is formed by the second element formed of the second ink having a lightness higher than that of the first ink, and it is visually recognized as a constant density on the printed matter. It is a forgery-preventing printed material in which a latent image having continuous tone appears by disappearing the element of. [Selection diagram]

Description

  The present invention is easy to authenticate when printed on a color copier or monochrome copier on printed matters that require counterfeiting or falsification of banknotes, stock certificates, securities such as bonds, various certificates, important documents, etc. The present invention relates to an anti-counterfeit printed matter that can be identified.

  Countermeasures against counterfeiting and tampering are important factors in banknotes, stock certificates, securities such as bonds, various certificates, and printed materials such as important documents. These measures to prevent counterfeiting and falsification of printed materials mainly include methods that use designs with diversified geometric patterns in the design, and some means and actions on the printed materials, which cannot be recognized visually. There is a way for the statue to appear. Typical examples of the former are tint blocks, color patterns, relief patterns, etc. that are widely used in the design of securities prints, etc., and typical examples of the latter are normally reproduced with latent image intaglios and color copiers. There are functional inks and copy prevention image lines that are not used.

  The above-mentioned background pattern, stencil pattern, relief pattern, etc. are basically composed of a set of curved lines with a fixed line width, and are counterfeits that take into account design such as the design of printed matter. It can be a measure to prevent tampering. By making the pattern complicated, it is difficult to produce the same pattern on the counterfeit material, and it is difficult to reproduce with a color copier. The role of anti-counterfeiting is enhanced by generating moire for the scanning input / output of the machine or scanner.

  The aforementioned patterns are widely used worldwide in the design of securities prints, etc., and have been used for a long time as patterns of prints with monetary value such as banknotes, stock certificates, bonds, etc. It is an important design as a design to attach. Therefore, in the printed matter such as banknotes, stock certificates, securities such as bonds, various certificates, important documents, etc., the background pattern, the colored pattern, the relief pattern, etc. are indispensable in design. However, recently, with the advent of sophisticated photoengraving apparatuses, color copiers, and monochrome copiers, there is a drawback that sufficient anti-counterfeiting and falsification preventing effects are not provided.

  In addition, as a representative technique of causing a latent image that could not be visually recognized by adding some means and action to the above-mentioned printed matter, generally a copy-preventing image line is used. There is a series of techniques called. Also, the latent image is printed on the surface of the paper with halftone dots, the background of the same density as the latent image is simultaneously printed on the lines, and the decorative pattern is not reproduced on the upper surface of the latent image including the background. By overprinting with transparent ink, the surface of the printed material is finished nicely, and when it is copied, the pattern becomes invisible, the background is reproduced, the latent image is not reproduced, and the density difference between the background and the latent image becomes obvious There have been many applications for a method that makes it possible to recognize at a glance that the material is a copy.

  In many of these inventions, a latent image is formed by the density of an image line group (hereinafter referred to as “screen pattern”) in which dots and lines such as halftone dots, lines, and / or lines are continuously arranged at a constant period, and is shown on a printed matter. Thus, the pattern on the entire printing surface is a screen pattern having a uniform density. When a printed material with this latent image is copied by a color copier or monochrome copier, there is a difference in density between the densely printed screen pattern that is not reproduced and the coarsely reproduced screen pattern that is reproduced. As a result, the latent image portion of the densely structured screen pattern that is not reproduced appears with respect to the reproduced coarsely structured screen pattern so that it is obvious that it is a copy.

  In addition, the present applicant also has a printed matter in which a latent image composed of a pattern such as halftone dots and lines on the surface of a sheet and a background composed of a different pattern from the latent image around the latent image are simultaneously printed in one color. As a printed matter suitable for copy prevention, the latent image pattern that has been subjected to latent image is not discernable with the naked eye. A method of camouflaging with an open circular pattern or a concentric pattern in which the halftone dot percentage of the partial screen pattern is increased with respect to the entire screen pattern has been filed (for example, see Patent Document 1). ).

  In addition, a latent image is formed using either one of the lines or halftone dots as a constituent, and a background is formed using the other as a constituent, and the lines are 50 lines 10% and the dots are 150 lines 10%. In order to camouflage the entire image line of the latent image and the background image on the original film, an image line structure has already been filed that incorporates a background pattern consisting of halftone dots of 175 lines and prints on the paper once. (For example, refer to Patent Document 2).

  In addition, the applicant of the present invention, as a curved collective pattern, has a shape in which the image line of the portion where the latent image is not applied is a continuous line, and the image line of the portion where the latent image is applied is arranged in the basic line direction at regular intervals. A part corresponding to one period consisting of one image part and a non-image part continuous in the basic line direction among the fixed period break lines of the part where the latent image is formed, consisting of fixed line break lines consisting of image lines Among the continuous lines of the portion where the latent image portion is not subjected to the latent image, the portion of the portion corresponding to the same length as one period consisting of the image portion and the non-image portion in the latent image portion described above. In the image line that is equal to the area and is the fixed-cycle break line of the part where the latent image is applied, the line of the fixed-cycle break line intersects with one of the image lines. Is deleted within the range of the line width of the other line, and a method for creating a copy-prevention pattern and its printed product are output. Is (e.g., see Patent Document 3).

  In addition, the applicant of the present invention has drawn a line pattern composed of one or a plurality of straight lines or curved lines, a solid line for a part where a latent image is not applied, and a line for a part where a latent image is applied. A latent image is formed on a printed matter composed of fixed periodic break lines composed of lines that are branched into a plurality of equal distances with the basic line direction as a reference, and the branched lines are arranged at regular intervals. The total image area of the portion corresponding to one period consisting of the image portion and the non-image portion branched in a plurality in the basic line direction is the solid line of the portion where the latent image is not applied. By making the image area of the portion corresponding to the same length as one cycle of the image line portion and the non-image line portion of the latent image portion of the image, the image becomes invisible when copied, and the image is visible before copying. The image line that constitutes one cycle is composed of the image line portion and the non-image line portion in the above-described latent image portion. Have filed a printed material such as larger than streaked area of the portion corresponding to the same length (for example, see Patent Document 4). This printed matter can be observed as a latent image that has been an invisible image appears after copying with a color copying machine or a monochrome copying machine, thereby improving the authenticity discrimination. ing.

  Further, the applicant forms a background portion having the same density by the first size image line reproduced by the copier and the second size image line not reproduced by the copier. By forming the visible image portion with a third size image line that is not reproduced by the machine, when the printed matter is observed under normal light, the visible image is displayed depending on the density of the visible image portion formed on the background portion. Although it is observed, when the printed matter is copied with a copying machine, the third size image line forming the visible image portion and the second size image line forming the background portion are not reproduced. An application has been filed for a copy / tamper-proof printed matter having an image change effect in which a latent image different from the image appears (see, for example, Patent Document 5).

  Further, the present applicant has the effect that the visible image formed on the printed material and the latent image appearing when copied by a copying machine are changed, and the latent image appearing on the copied material is converted into a photographic image. An application has been filed for an anti-counterfeit printed matter that can produce such a continuous tone image (see, for example, Patent Document 6). In this printed matter, a latent image having continuous gradation is formed by the size (thick and thin) of the latent image line, and a camouflage line whose density is reversed from that of the latent image line is not reproduced by a copying machine. By forming the line, the latent image is not confirmed even when the printed matter is visually confirmed. However, when copying with a copying machine, the camouflage line disappears and a latent image having continuous tone appears.

Japanese Patent No. 2695523 Utility Model No. 3010365 Japanese Patent No. 3268418 Japanese Patent No. 3689786 Japanese Patent No. 569663 Japanese Patent Laid-Open No. 2006-172340

  However, the printed matter of Patent Documents 1 and 2 does not exhibit the copy prevention function because the image line configuration can be easily reproduced when a recent highly functional plate making and printing output device is used. There was a thing.

  In addition, although the printed matter of Patent Documents 3 and 4 has improved the effect at the time of copying, the pattern that was a visible image is not completely replaced, and the visible image has priority over the portion where the visible image and the latent image overlap. As a result, the latent image is partially missing, and there is a problem of improving the visibility of an image viewed after copying.

  Further, the printed matter of Patent Document 5 has a visible image and a latent image appearing on the copied material completely interchanged in the printed material and the copied material. A regular image line that forms a latent image creates an image change effect due to an on / off relationship that remains or disappears. Since the latent image itself is a binary image, the visible image is There remains a problem that a method of creating a counterfeit product by processing an image of a copy that has disappeared and a latent image has appeared does not have high counterfeit resistance.

  Further, the printed matter of Patent Document 6 has a very high anti-copying effect on the act of processing a copy by forming a latent image having continuous tone, but forms a latent image. Since the latent image line and the camouflage line are composed of “lines” and “points”, the visibility of the latent image is mounted on the copying machine as in Patent Documents 3 to 5. Depending on the image processing performance of the filter or the like, the camouflaged image line may not disappear completely. For this reason, there remains a problem that the anti-copying effect is not sufficient.

  Further, the printed matter of Patent Documents 1 to 6 has a problem that fine line disappearance cannot be avoided in long-run printing in a plate-type system such as offset printing, and printing stability is inevitably deteriorated.

  The present invention aims to solve the above-described problems, and has the effect of changing a printed pattern formed on a printed matter and a latent image having continuous tone that appears when copied by a copying machine. In addition, the latent image line reproduced by the copying machine is printed with low lightness (dark color) ink, and the camouflage image line not reproduced by the copying machine is printed with high lightness (light color) ink of less than 200 lines / inch. Thus, the present invention relates to a forgery-preventing printed material that can provide sufficient printing stability in long-run printing, and to ensure that a latent image having a continuous tone appears on a copy, and a method for producing the same.

  The anti-counterfeit printed matter of the present invention has a print area in which a latent image having a continuous tone is formed on at least a part of a substrate, and the print area is a positive image of the latent image by the first ink. The first element formed with a different area ratio in accordance with the second ink, and the second ink having the same hue as the first ink and having a higher lightness than the first ink. Accordingly, the second element is formed with different area ratios, and the lightness including the first element and the second element formed per unit area in the print region is the same. And forgery prevention printed matter.

  In addition, the first element and / or the second element in the forgery-preventing printed matter of the present invention is a forgery-preventing printed matter characterized by being formed of characters, symbols, or figures.

  Furthermore, the printed region in the forgery-preventing printed material of the present invention has a third element formed of the second ink, and a visible image is formed by the third element, the anti-counterfeit printed material It is.

  The anti-counterfeit printed matter of the present invention ensures that the second image formed with the second ink having high brightness (density) disappears without depending on the performance such as the resolution of the copying machine. Counterfeiting using can be reliably prevented.

  The anti-counterfeit printed matter of the present invention can make an image visually recognized on a copy as an image having a complex continuous tone, and therefore, when used for an identification card including a face image, a diploma, etc. By comparing the face photograph formed on the copy with the latent image, the authenticity can be easily determined.

  Further, the printed matter for preventing forgery of the present invention prints a first element forming a positive image of a latent image having a continuous tone with a first ink having a low lightness (dark color), so that the negative of the latent image is obtained. By printing the second element that forms an image with a second ink having a size that can withstand long-run printing and a high brightness (dark color), high printing stability in long run can be maintained. .

The figure which shows the structure of the printed matter in 1st Embodiment. The figure which shows the structure of the copy in 1st Embodiment. The figure which shows the 1st element and 2nd element which form a latent image in a specific area | region. The figure which shows the modification in the specific area | region in 1st Embodiment. The figure which shows the example of the line pattern on the curve in 1st Embodiment. The figure which shows the area | region in the printed matter in 2nd Embodiment. The figure which shows the area | region in the copy in 2nd Embodiment. The figure which shows the area | region in the printed matter in 2nd Embodiment. The figure which shows the area | region in the copy in 2nd Embodiment. The figure which shows the structure of the printed matter in 3rd Embodiment. The figure which shows the structure of the copy in 3rd Embodiment. The figure which shows the 1st element and 2nd element which form a latent image in a specific area | region.

  DETAILED DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments for carrying out the invention described below, and the scope of the technical idea described in the claims. Within the scope, various other embodiments are included.

(First embodiment)
An anti-counterfeit printed matter (hereinafter referred to as “printed matter”) according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a printed matter (1) in the first embodiment, in which a printed pattern (2) having a copy prevention function is formed on a substrate. As shown in the enlarged view of FIG. 1, the printed pattern (2) is formed with a first element (3) having a size that is reproduced during copying and a second element (4) having a density that is not reproduced during copying. The That is, the first element (3) is printed with the first ink having a low lightness (dark color), and the second element (4) is printed with the second ink having a high lightness (light color).

  The first element (3) is a line pattern regularly formed at a constant pitch, and by forming the width of the first element (3) in accordance with the grayscale image forming the latent image, A latent image is formed. In this embodiment, the pitch of the line pattern is 508 μm (equivalent to 50 lines / inch). On the other hand, the second element (4) is formed by large and small halftone dots or the like, and the lightness in which the first element (3) and the second element (4) in a specific region are added becomes constant. Thus, the area ratio of the second element (4) is changed in accordance with the increase or decrease of the width of the first element (3) expressing the gradation of the latent image.

  Since the second element (4) needs to be formed as an element that cannot be reproduced by a copying machine such as a color copying machine, the second element (4) is printed with high brightness (light color) ink of about 50 to 80 lines / inch. The lightness of the second ink may be set to a lightness that is not reproduced by the copying machine. However, in order to keep the lightness including the first element (3) and the second element (4) constant, In the case of forming at an area ratio of 2 times or more of the element (3), it may be set so that it can be formed with a constant brightness.

  In the printed matter (1) according to the first embodiment, the area ratio of the second element (4) is set to 60% or less. However, the first element (3) and the second element (4) in a specific region are used. In order to keep the lightness of the sum of the first and second elements constant, it is possible to obtain the same density as the state in which the first element (3) density is formed at the maximum density and can be formed in a size that can withstand long run printing. Absent. The same effect can be obtained if at least the second element (4) is formed of high brightness (light color) ink which is difficult to be reproduced by a copying machine.

  FIG. 2 shows a copy (5) of the printed product (1) in the first embodiment. As shown in FIG. 2, in the copy pattern (6) in the copy (5), the latent image formed by increasing or decreasing the width of the first element (3) is visualized. This is because, as shown in the enlarged view of FIG. 2, the second element (4) formed with the lightness that is not reproduced by the copying machine disappears in the copy (5). As a result, the density difference of the first element (3) expressing the density of the latent image is reproduced as it is and visualized as a copy pattern (6).

  Next, the configuration of the printed matter (1) according to the first embodiment will be described with reference to FIG. FIG. 3 shows the first element (3) and the second element (4) as a configuration in which the density of the entire printed pattern (2) is adjusted to the density when the area ratio is 20% with the first ink. This shows the relationship. The first element (3) reproduces the positive image (3a) of the latent image as it is. The first element (3) corrects the density of the latent image so that the image can be expressed with an area ratio of 0% to 20%. It is formed of lightness (dark color) ink, and the second element (4) forms a negative image (4a) of the latent image, and the first element (3) is the most latent image. In order to maintain high printing stability in a long run, which is the maximum value when arranged as a light density element, a rough halftone dot of about 50 to 80 lines / inch is used, and the area ratio is expressed by an element of 60% or less. The same lightness can be maintained in a specific area by correcting the density to a negative image and using an element formed with high lightness (light color) ink.

  As shown in FIG. 3, when forming the lightest color portion of the positive image (3a) of the latent image formed by the elements of low lightness (dark color) ink, that is, 0%, the first element (3) Similarly, the area ratio is formed at 0%, and the second element (4) formed at an area ratio of 60% with the high brightness (light color) ink supplementing the density of the first element (3) is formed. A predetermined brightness can be provided in a specific area. Since the number of lines of the line pattern is 50 lines / inch, the pitch (P) of the line pattern is 508 μm.

  Similarly, when the first element (3) having an area ratio of 5% is formed, about 45% of the second element (4) is formed, and 10% of the first element (3) is formed. About 15% of the second element (4) is formed, and about 15% of the first element (3) is formed, about 15% of the second element (4) is formed, % Of the first element (3) is formed, the second element (4) is not arranged as 0%. By maintaining the same lightness in the continuous tone of the positive image (3a) of the latent image by forming the above-described laws, the latent image formed in the printed pattern (2) is not visualized. Can be formed as That is, in the present invention, the same brightness including the first element (3) and the second element (4) formed per unit area means that the area ratio of the first element (3) varies. By forming the second element (4) according to the above, it is visually recognized as the same color.

  In FIG. 3, the first element (3) and the second element (4) in a specific region have been described as having the same brightness, but the brightness is not limited to this, The color of the low lightness (dark color) ink of the first element (3) and the color of the high lightness (light color) ink of the second element (4) may be set appropriately according to the anti-copying effect, and the area ratio This is not the case.

  FIG. 4 shows a modified example in a specific area in the printed matter (1) of the first embodiment. As described above, the lightness in each specific area shown in FIG. 3 is the same. If possible, the shape, arrangement position, etc. of the first element (3) and the second element (4) are not particularly limited. For example, as shown in FIG. 4 (a), the first element (3 ) And the second element (4) may be a line pattern provided at the same position, or the minimum element width is maintained in a portion where the area ratio of the line pattern is low, as shown in FIG. 4B. It may be a different shape. That is, element shapes that can be expressed by printing are within the scope of the present invention. Further, as shown in FIG. 4C, a halftone dot pattern in which the first element (3) and the second element (4) are provided at the same position may be used. Further, as shown in FIG. 4D, the first element (3) and the second element (4) may be formed in the form of “characters” provided at the same position.

  The specific area is an area including the first element (3) and the second element (4). In the specific area, the first element (3) and the second element (4 ) Have a line pattern, a line pattern on a curve as a whole can be formed as shown in FIG. As a result, various patterns such as wave lines and concentric lines can be applied to the line pattern, and a tint block pattern or the like in consideration of design can be formed by the first element (3).

(Second Embodiment)
Next, the printed matter (1) in the second embodiment will be described. The printed matter (1) according to the second embodiment is obtained by using the first element (3) and the second element (4) of the modification shown in FIG. It is a structure that becomes a background pattern with " FIG. 6 shows a partial area of the printed matter (1) in the second embodiment, and the area (7) shown in FIG. 6 (a) includes the first element (3) and the second element. The “character” -like element formed by the element (4) is formed, and the first element (3) has a form in which the area ratio is increased from the upper part to the lower part of the figure. In addition, the area ratio of the second element (4) provided at the same position as the first element (3) is increased from the lower part to the upper part of the figure so that the brightness in the region (7) is the same. It is in form. As a result, the brightness in the region (7) is the same, and the latent image is not visually recognized.

  In the region (8) shown in FIG. 6B, a “character” -like element formed by the first element (3) and the second element (4) is formed. (3) is a form in which the area ratio is increased from the left to the right in the figure. In addition, the area ratio of the second element (4) provided at the same position as the first element (3) is increased from the right to the left in the figure so that the brightness in the region (8) is the same. It is in form. As a result, the brightness in the region (8) is the same, and the latent image is not visually recognized. The “character” to be used is not limited to a typeface, but may serve as a so-called character medium such as a sentence or symbol having a specific meaning.

  FIG. 7 shows a part of a copy obtained by copying the print (1) according to the second embodiment. The area (9) in the copy shown in FIG. 7 (a) is a state where the area (7) shown in FIG. 6 (a) is copied, and the second element (4) is lost by copying. Thus, only the first element (3) having a high area ratio is observed from the upper part to the lower part of the figure. On the other hand, the area (10) in the copy shown in FIG. 7B is a state where the area (8) shown in FIG. 6B is copied, and the second element (4) is copied. By disappearing, only the first element (3) having a high area ratio is observed from the left to the right in the figure.

  FIG. 8 shows a printed pattern (11) of the printed matter (1) in the second embodiment. The entire printed matter is a “character” -like first element (3) and second element (4). It is formed with a fixed area ratio. The first element (3) and the second element (4) include the first element (3) and the second element (4) shown in FIG. 4 (d).

  The two types of elements shown in FIG. 8 are obtained by the second element (4) because the latent image is applied by the first element (3) using the law shown in FIG. The image is formed in a state where it is not visualized.

  FIG. 9 shows a copy pattern (12) in which the print pattern (11) shown in FIG. 8 is copied, and the latent image formed by the first element (3) reproduced by the copying machine is reproduced. Then, the second element (4) that cannot be reproduced by the copying machine disappears, and the latent image appears.

(Third embodiment)
Next, the printed matter (1) in the third embodiment will be described. As shown in FIG. 10, the printed matter (1) in the third embodiment is further provided with a third element (13) in the region where the first element (3) and the second element (4) are formed. ) Form a visible image. Similar to the second element (4), the third element (13) is printed with the second ink having a high lightness (light color).

  FIG. 11 shows a copy (5) of the printed product (1) in the third embodiment. As shown in FIG. 11, in the copy pattern (6) in the copy (5), the latent image formed by increasing or decreasing the width of the first element (3) is visualized. This is because, as shown in the enlarged view of FIG. 11, the second element (4) and the third element (13) formed with the lightness not reproduced by the copying machine disappear in the copy (5). The relationship of the same brightness that was maintained in the relationship between the first element (3) and the second element (4) in the specific area in the visible image in the printed pattern (2) shown in FIG. The density difference of the first element (3) representing the density of the image is reproduced as it is, and is visualized as a copy pattern (6).

  Next, the configuration of the printed matter (1) in the third embodiment will be described with reference to FIG. FIG. 12 shows an example in which a visible image (13a) is formed by the third element (13) in the relationship between the first element (3) and the second element (4) described in FIG. It is.

  As shown in FIG. 12, the highest density element of the visible image (13a) is 9% at the maximum in the area kept at a constant brightness by the first element (3) and the second element (4). The area ratio is formed. As for the arrangement of the third element (13), it is sufficient that the third element (13) is formed so as not to overlap the region where the first element (3) and the second element (4) are formed. ) And the area ratio obtained by adding the area ratio of the third element (13).

DESCRIPTION OF SYMBOLS 1 Print 2 Print pattern 3 First element 3a Positive image 4 of latent image 4 Second element 4a Negative image 5 of latent image Copy 6 Copy pattern 7 Area 8 in print 9 Area 9 in print Area 10 area 11 in the copy 11 printed pattern 12 copied pattern 13 third element 13a visible image

Claims (3)

Having a print area in which a latent image having continuous tone is formed on at least a part of the substrate
The print area has the same hue as the first ink, the first element formed by the first ink having a different area ratio according to the positive image of the latent image, and the first ink. The second ink having a lightness higher than that of the second ink has a second element formed with a different area ratio depending on the negative image of the latent image,
An anti-counterfeit printed matter, characterized in that the first element formed in a unit area in the printing region and the second element are formed with the same brightness.   The forgery prevention printed matter according to claim 1, wherein the first element and / or the second element is formed by a character, a symbol, or a figure. The print area has a third element formed of the second ink;
The forgery prevention printed matter according to claim 1, wherein a visible image is formed by the third element.

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