JP4512789B2 - Anti-counterfeit printed matter - Google Patents

Description

  The present invention is used for printed matter that requires anti-counterfeit and tamper-proof functions including banknotes, passports, securities, cards, and other valuable printed matter.

  In recent years, with the increase in image quality of color copiers and computerization of color platemaking technology, counterfeiting means for banknotes and securities tend to be diversified. In particular, the resolution of image input / output devices used in the printing industry has significantly improved, and it has become easier to extract fine lines and minute characters used in securities. This is not only forgery by the general commercial printing method consisting of halftone dot composition of 4 colors, but also composed of black and white binary such as background pattern, color pattern or relief pattern adopted in many current securities However, scanners and other input / output devices enable high-precision extraction, and the number of full-fledged counterfeit tickets using many special color plates has increased.

  Therefore, in order to deal with counterfeiting in recent years, Japanese Patent Application Laid-Open No. 2003-136828 filed earlier by the present applicant is used in general commercial printing when two types of halftone images are evenly arranged on the same plane. A visible or invisible image is generated using basic four-color inks of cyan (C), magenta (M), yellow (Y), and black (Bk) including infrared absorbing dye, which does not include infrared absorbing dye, The present invention has provided a halftone dot printed material and a printing method for printing an invisible image that cannot be reproduced without using a special appraisal device or the like at low cost.

  However, the design of banknotes, passports, securities, cards, and other valuable printed materials is generally composed of complicated lines for the purpose of preventing counterfeiting and tampering. Thereby, JP-A-2003-136828 is based on a simple halftone dot only for the purpose of expressing a continuous tone image, and bills, passports, securities, cards, etc. that constitute a design with a complex line group There is also a problem that it is not suitable for the design of rare prints.

JP2003-136828

  In view of the above problems, printed materials having an anti-counterfeit effect are required to be used as designs for banknotes, passports, securities, cards, and other valuable printed materials.

  That is, in the anti-counterfeit printed matter including two types of line groups having different designs, the line width of the image line constituting the second pattern is equal to or less than the minimum image line width of the first pattern. By being printed so as to be combined, the second pattern is hidden by the first pattern and can be made invisible. Accordingly, an object is to obtain a printed matter in which it is difficult to recognize only the first pattern and recognize the second pattern.

  In addition, when the first pattern is printed with an ink not containing an infrared absorbing dye, the second pattern is printed with an ink containing an infrared absorbing dye, and the printed matter is observed with an infrared camera using an infrared camera, the first pattern is obtained. The purpose is to recognize only the second pattern, not the pattern.

  In addition, the same printing can be applied to different designs such as a visible first pattern that changes in two or continuous tones depending on the line width of the image line, and an invisible second pattern that is a latent image. It can be provided on the surface, and it is intended to recognize different designs by visual observation with visible light and infrared vision with an infrared camera or the like.

The present invention is a printed matter having two patterns composed of a plurality of regularly arranged lines on at least a part or all of a substrate, wherein the two patterns absorb or absorb at a specific wavelength. It consists of a first pattern printed with a material that does not excite and a second pattern printed with a material that absorbs or excites at a specific wavelength, and the first pattern and the second pattern The image line that is configured by the change or the arrangement of the image line and that forms the second pattern is arranged so as to be superimposed on the image line of the image line that forms the first pattern. It is a printed matter for preventing forgery.

  Further, the first pattern in the present invention is composed of the first line group, the second pattern is composed of the second line group as the background of the image and the third line group constituting the image, The anti-counterfeit printed matter is characterized in that the second pattern is formed by the phase shift of the pitch between the second line group and the third line group.

  Moreover, the specific wavelength of the material which prints the 1st pattern in this invention is infrared rays or an ultraviolet-ray, The printed matter for forgery prevention characterized by the above-mentioned.

  Further, the first pattern in the present invention is a forgery-preventing printed matter characterized by having the same color or high density as the second pattern under visible light.

  In addition, the image line constituting the first pattern and the second pattern in the present invention is a line, a wave line, a concentric circle line, or a wave concentric circle line, forgery prevention printed matter It is.

  In an anti-counterfeit printed matter composed of two types of line groups having different designs, the line width of the image line constituting the second pattern is set to be equal to or smaller than the minimum image line width of the first pattern. By printing on the second pattern, the second pattern can be hidden by the first pattern and become invisible. Thereby, it is possible to obtain a printed matter in which it is difficult to recognize only the first pattern and recognize the second pattern.

  The first pattern is recognized when the first pattern is printed with ink containing no infrared absorbing dye, the second pattern is printed with ink containing the infrared absorbing dye, and the printed matter is viewed with an infrared camera or the like. It is not possible to recognize only the second pattern.

  In addition, the same printing can be applied to different designs such as a visible first pattern that changes in two or continuous tones depending on the line width of the image line, and an invisible second pattern that is a latent image. Each design can be provided on the surface, and different designs can be recognized between visual observation using visible light and infrared observation using an infrared camera or the like.

  The printed matter for preventing forgery of the present invention has a line group on at least a part or all of the substrate, and is composed of a first pattern and a second pattern composed of these line groups. The positional relationship on the printed matter between the first pattern and the second pattern is such that the image line constituting the second pattern is arranged within the image line width of the image line constituting the first pattern. It is a printed matter printed together.

  In order to further enhance the effect of the present invention, the first pattern in the form of a plurality of lines (including a straight line, a wave line, a concentric line, a wave concentric line, etc.) in which a plurality of lines are arranged at the same pitch. And a second line (including a straight line, a wave line, a concentric line, a wave concentric line, etc.) arranged at the same or twice the pitch as the line of the first pattern. It is desirable to be two types of line groups consisting of the following patterns.

  In addition, an image having an arbitrary design such as a character or a symbol mark that can be perceptually recognized due to a difference in the line widths of the lines constituting the first pattern, and the lines constituting the second pattern Also, an image having an arbitrary design such as a character and a symbol mark that can be perceptually recognized is formed by the difference in the line width or the arrangement of the line. In addition, since the maximum drawing line width of the drawing line constituting the second pattern is equal to or smaller than the minimum drawing line width of the drawing line constituting the first pattern, the second pattern is provided. The arbitrary design is completely hidden by the first pattern and is invisible.

  In addition, an ink containing no infrared absorbing dye is used for the first pattern, and an ink containing an infrared absorbing dye is used for the second pattern. Thereby, each different design can be recognized by visual observation with visible light and infrared vision with an infrared camera or the like. In addition to the infrared absorbing dye, various functional materials such as a fluorescent material or a magnetic material may be used.

Example 1
Hereinafter, the basic configuration for creating the line group of the present invention will be described in more detail. However, the contents of the present invention are not limited to the scope of the examples.

  FIG. 1 shows a first pattern. A pattern 1 shown in FIG. 1 is a line-shaped line group 2 having a regular arrangement with a pitch d1. Due to the difference in the line width of the line group 2 and the two gradations or the continuous gradation, it can be visually recognized as an arbitrary design, for example, the letter “A” shown in FIG. As shown in the partially enlarged view in FIG. 1, the line group 2 of the pattern 1 constitutes the design of the letter “A” by the difference between the maximum image line width w1 and the minimum image line width w2. This pattern 1 is printed with an ink that does not contain an infrared absorbing dye and an ink with lower lightness (high printing density) than the second pattern under visible light.

  FIG. 2 shows a second pattern. The pattern 3 shown in FIG. 2 is a line group 4 having a line shape that is regularly arranged with a pitch d1. Since it has two gradations or continuous gradations depending on the difference in the line width of the line group 4, it can be visually recognized as an arbitrary design, for example, the letter “B” shown in FIG. 2, the line group 4 of the pattern 2 forms the design of the letter “B” by the difference between the maximum image line width w3 and the minimum image line width w4. This pattern 2 is printed with an ink containing an infrared-absorbing dye and an ink having a higher lightness (a lower printing density) than the first pattern under visible light.

  FIG. 3 shows a state in which the first pattern and the second pattern described above are overprinted on the print medium P1. 3, the maximum line width w3 of the line group 4 of the pattern 3 is equal to or smaller than the minimum line width w2 of the line group 2 of the pattern 1. Further, the line group 4 of the pattern 3 is printed so as to fit within the range of the minimum image line width w2 of the line group 2 of the pattern 1. As for the printing order of the patterns 1 and 3, it is desirable that the pattern 1 is printed on the pattern 3 on the print medium, but the brightness difference of each pattern under visible light is higher in the pattern 3. Since the printing density is low, the printing order may be reversed.

  By combining the pattern 1 and the pattern 2 on the print medium P1, only the pattern 1 shown in FIG. 1 is a visible image. At this time, the pattern 3 shown in FIG. 2 is absorbed by the pattern 1 with low lightness (high print density) and is invisible. When the printed material is observed using an infrared camera or the like, the pattern 1 shown in FIG. 1 becomes an invisible image, and the pattern 3 shown in FIG. 2 becomes visible. Therefore, the letter “A” included in the pattern 1 can be visually recognized in the normal naked eye, and the letter “B” included in the pattern 3 can be visually recognized in the infrared vision using an infrared camera or the like.

(Example 2)
FIG. 4 shows a second pattern expressed differently from the first embodiment. Since the first pattern has the same configuration as that of the first embodiment, the description thereof is omitted. The pattern 5 shown in FIG. 4 includes a line group 6 and a line group 7 in a line shape, and the pitch d2 of the line group 6 and the line group 7 is twice the pitch d1 of the line group 2 of the pattern 1. . Further, the line group 7 constitutes the design of the letter “B” by being alternately arranged with the line group 6 at the same pitch d1 of the line group 2 shown in FIG. This pattern 5 is printed with an ink containing an infrared-absorbing dye and an ink having a higher lightness (a lower printing density) than the first pattern under visible light.

  FIG. 5 shows a state in which the first pattern and the second pattern described above are overprinted on the print medium P2. The line width w5 of the line group 6 and the line group 7 of the pattern 2 is equal to or smaller than the minimum image line width w2 of the line group 2. Further, the line group 6 and the line group 7 of the pattern 5 are printed so as to fit within the range of the minimum image line width w2 of the line group 2 of the pattern 1. As for the printing order of the patterns 1 and 5, it is desirable that the pattern 1 is printed on the pattern 5 on the printing medium, but the brightness difference of each pattern under visible light is higher in the pattern 5. Since the printing density is low, the printing order may be reversed.

  By combining the pattern 1 and the pattern 2 on the print medium P2, only the pattern 1 shown in FIG. 1 is a visible image. At this time, the pattern 5 shown in FIG. 4 is absorbed by the pattern 1 having low brightness (high printing density) and is invisible. When the printed material is observed using an infrared camera or the like, the pattern 1 shown in FIG. 1 becomes an invisible image, and the pattern 5 shown in FIG. 4 becomes visible. Therefore, the letter “A” included in the pattern 1 can be visually recognized in the normal naked eye, and the letter “B” included in the pattern 3 can be visually recognized in the infrared vision using an infrared camera or the like.

(Example 3)
FIG. 6 shows the second pattern. Since the first pattern has the same configuration as that of the first embodiment, the description thereof is omitted. The pattern 8 shown in FIG. 6 is composed of a line group 9 and a line group 10 each having a line shape, and the pitch d2 of each of the line group 9 and the line group 10 is twice the pitch d1 of the line group 2 of the pattern 1. Yes. The line group 9 and the line group 10 constitute a ½ pitch phase shift distance L1. Thereby, for example, a relief pattern that can be visually recognized as the letter “B” shown in FIG. 6 is expressed. This pattern 8 is printed with an ink containing an infrared absorbing dye and an ink having a higher lightness (lower printing density) than the second pattern under visible light.

  FIG. 7 shows a state in which the first pattern and the second pattern are overprinted on the print medium P3. As shown in the partial enlarged view in FIG. 7, the line width 9 of the line group 9 and the line group 10 of the pattern 8 is equal to or smaller than the minimum line width w2 of the line group 2 of the pattern 1. Further, the line group 9 and the line group 10 of the pattern 8 are printed so as to fit within the range of the minimum image line width w2 of the line group 2 of the pattern 1. As for the printing order of the patterns 1 and 3, it is desirable that the pattern 1 is printed on the pattern 8 on the printing medium, but the brightness difference of each pattern under visible light is higher in the pattern 3. Since the printing density is low, the printing order may be reversed.

  By combining the pattern 1 and the pattern 8 on the print medium P3, only the pattern 1 shown in FIG. 1 is a visible image. At this time, the relief pattern of the pattern 8 shown in FIG. 6 is absorbed by the pattern 1 with low brightness (high print density) and is invisible. When the printed matter is observed using an infrared camera or the like, the pattern 1 shown in FIG. 1 becomes an invisible image, and the relief pattern of the pattern 8 shown in FIG. 6 becomes visible. Therefore, the letter “A” included in the pattern 1 can be visually recognized in the normal naked eye, and the letter “B” included in the pattern 8 can be visually recognized in the infrared vision using an infrared camera or the like.

  In the best mode for carrying out the present invention, an ink containing no infrared absorbing dye is used for the first pattern and an ink containing an infrared absorbing dye is used for the second pattern. Without limitation, various functional materials such as a fluorescent material or a magnetic material may be used.

Example 4
Next, another embodiment of the present invention will be described with reference to the drawings. First, a basic figure as shown in FIG. 8 is prepared. The temporary phase figure 11 has a design of “Sakura”, for example. The temporary phase figure 12 and the temporary phase figure 13 are, for example, the design of the letter “S”.

  The temporary figure 11 shown in FIG. 8 is configured by providing a line group 15 with a boundary of change in the line width in the pattern 14 printed with the ink that does not contain the infrared absorbing pigment of FIG. The pattern 14 is a wavy line group of lines formed at a pitch of 400 μm, and can be visually recognized as “Sakura” by the boundary of the change in the line width formed by the temporary pattern 11. In this embodiment, the line width of the outer line group 15 of the temporary pattern 11 is 250 μm, and the line width of the inner line group 15 is 160 μm. As a method for providing a change in the line width of the line group 15, various methods are disclosed today. For example, if a line creation application provided by Esco Graphics (Belgium), Yura (Hungary), or the like is used, it is possible to easily change the line width. Therefore, in the present invention, the method for creating the pattern 14 is not limited at all.

  On the other hand, the temporary figure 12 shown in FIG. 8 covers the line group 17 outside the design of the letter “S” in the pattern 16 printed with the ink containing the infrared absorbing dye of FIG. . At the same time, the temporary pattern 13 covers the line group 18 inside the design of the letter “S” in the pattern 16 printed with the ink containing the infrared absorbing pigment. The line group 17 and the line group 18 are wavy line-shaped line groups configured with an 800 μm pitch, which is twice the 400 μm pitch of the pattern 14. Further, the pattern 16 is composed of a line group 17 and a line group 18 that forms a phase shift of 400 μm pitch, which is ½ pitch with the line group 17. A latent image of a relief pattern that can be visually recognized as a design of the character "" is expressed. That is, by having a phase shift of ½ pitch of the pitch of the line group 15 of the pattern 14 shown in FIG. 9, the pattern 16 shown in FIG. 10 is formed and a latent image of a relief pattern is formed. Yes. As a method for creating the pattern 16 described in the present embodiment, various methods are disclosed today. For example, when using an application provided by Adobe (USA) or the like, the temporary figure 12 and the temporary figure 13 are applied as mask objects, the line group 17 and the line group 18 are divided into layers, and It can be easily created with the same color setting. Therefore, in the present invention, the method for creating the pattern 16 is not limited at all.

  FIG. 11 shows a state in which the pattern 14 and the pattern 16 described above are overprinted on the print medium P4, and only the pattern 14 shown in FIG. 9 is visible because the pattern 14 is overprinted on the pattern 16. It is an image. At this time, the latent image of the relief pattern of the pattern 16 shown in FIG. 10 is hidden by the pattern 14 and is invisible.

  When the print medium P4 is examined in detail, the line group 15 of the pattern 14 forms a design of “Sakura” due to the difference between the maximum image line width w8 and the minimum image line width w7, as shown in a partially enlarged view in FIG. The temporary phase figure 11 is comprised. Further, the line width w9 of the line group 17 and the line group 18 of the pattern 16 is equal to or smaller than the minimum line width w7 of the line group 15 of the pattern 14. Furthermore, the line group 17 and the line group 18 of the pattern 16 are printed so as to fit within the range of the minimum image line width w7 of the line group 15 of the pattern 14. In this embodiment, since the pattern 16 is hidden by the pattern 14, the line widths of the line group 17 and the line group 18 are set to 80 μm, which is thinner than the minimum line width 160 μm in the line group 15 of the pattern 14. did.

  When the printed matter is observed using an infrared camera or the like, the pattern 14 shown in FIG. 9 becomes an invisible image, and the latent image of the relief pattern of the pattern 16 shown in FIG. 10 becomes visible. Therefore, the design of “Sakura” provided on the pattern 14 can be visually recognized in the normal naked eye, and the design of the letter “S” provided on the pattern 16 can be seen in the infrared vision using an infrared camera or the like. .

  About the pattern 14 and the pattern 16 obtained as described above, by using an offset printing machine, the pattern 14 is printed with an ink not containing an infrared absorbing dye, and the pattern 16 is printed with an ink containing an infrared absorbing dye, A printed matter that can be recognized as being printed in a single color under visible light can be obtained. In addition, when the printed matter is observed with infrared rays by an infrared camera or the like, the first pattern 14 cannot be recognized, and only the second pattern 16 can be visually recognized.

  In addition, although the present Example demonstrated by the wavy line-shaped line group, as long as the line which a line arrange | positions at the same pitch, a straight line, a wave line, a concentric circle line, a wave concentric line, etc. It is not limited. Further, the printing method and the printing medium are not limited at all.

FIG. 3 is a diagram illustrating a first pattern in the first embodiment. The figure which showed the 2nd pattern in Example 1. FIG. In Example 1, the figure which showed the state which printed the 1st pattern and the 2nd pattern on the printing medium P1 repeatedly. The figure which showed the 2nd pattern in Example 2. FIG. In Example 2, the figure which showed the state which printed the 1st pattern and the 2nd pattern on the printing medium P1 repeatedly. The figure which showed the 2nd pattern in Example 3. FIG. In Example 3, the figure which showed the state which printed the 1st pattern and the 2nd pattern on the printing medium P1 repeatedly. The figure which showed the virtual figure in Example 4. FIG. The figure which showed the 1st pattern in Example 4 (pattern 14 printed with the ink which does not contain an infrared rays absorption pigment | dye). The figure which showed the 2nd pattern in Example 4 (pattern 16 printed with the ink containing an infrared rays absorption pigment | dye). In Example 4, the figure which showed the state which printed the 1st pattern and the 2nd pattern on the printing medium P2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st pattern in Examples 1, 2, and 3 2 Line group which comprises 1st pattern in Examples 1, 2, and 3 3 2nd pattern in Example 1 4 2nd pattern in Example 1 Line group to be configured 5 Second pattern in Example 2 6 Second line group to configure second pattern in Example 2 7 Third line group to configure second pattern in Example 2 8 Example 2nd pattern in 3 9 The 2nd line group which constitutes the 2nd pattern in Example 3 The 3rd line group which constitutes the 2nd pattern in Example 3 11 The 1st pattern in Example 4 ( Temporary phase figure)
12 Second pattern (provisional figure) in Example 4
13 Second pattern (provisional figure) in Example 4
14 First pattern in Example 4 15 Line group constituting first pattern in Example 4 16 Second pattern in Example 4 17 Third line group constituting second pattern in Example 4 18 Second line group constituting the second pattern in Example 4 L1 Phase shift distances P1, P2, P3, P4 Print media w1, w3, w8 Maximum image line width w2, w4, w7 Minimum image line width w5, w6, w9 stroke width

Claims (5)

Printed material having two patterns composed of a plurality of regularly arranged lines on at least a part or all of the substrate, the two patterns not absorbing or exciting at a specific wavelength And a second pattern printed with a material that absorbs or excites at the specific wavelength, and the first pattern and the second pattern have a line width of It is configured by the change or the arrangement of the image line, and the image line forming the second pattern is arranged so as to be superimposed on the image line of the image line forming the first pattern. Characterized forgery prevention printed matter. The first pattern is composed of a first line group, and the second pattern is composed of a second line group serving as a background of the image and a third line group constituting the image, and the second pattern The forgery-preventing printed matter according to claim 1, wherein the second pattern is formed by a phase shift of a pitch between a line group and the third line group. The forgery prevention printed matter according to claim 1 or 2, wherein the specific wavelength is infrared or ultraviolet. 4. The forgery-preventing printed matter according to claim 1, wherein the first pattern has the same color or a high density as the second pattern under visible light. 5. 5. The forgery according to claim 1, wherein the image lines constituting the first pattern and the second pattern are a line, a wave line, a concentric circle line, or a wave concentric circle line. Print for prevention.

Images