JP3501334B2 - Copy-prevention printed matter and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital color copy of a printed matter that requires anti-counterfeiting and tampering prevention of banknotes, passports, securities, identification cards, cards, pass tickets, valuable printed materials or important documents. When a copy is made using a machine, an image in which a part of any specific image remains
Alternatively, the present invention relates to a copy-preventing printed matter having a copy-preventing effect in which an arbitrary meaningful image is changed to another new meaningful image, whereby it can be easily visually discerned that it is a copy and a manufacturing method thereof. is there.

[0002]

2. Description of the Related Art Conventionally, as a printed matter for preventing forgery by copying using a color copying machine, for example, one of a background and a latent image of the same color is a line and the other is a halftone dot, or one is a fine halftone dot. The other one is composed of coarse halftone dots, and the latent image is hidden by the decorative pattern by overprinting the decorative pattern on the upper surface of the latent image with a light-colored transparent ink that is not reproduced by copying. Is difficult to identify with the naked eye, but when it is applied to a copying machine, the decorative pattern printed with the light-colored ink is not copied, and the latent image is clearly recognized due to the difference in reproduction of the two highlighted halftone dots. There is JP-A-64-5835 (named "printed matter suitable for copy prevention"). This is a combination of large and small halftone dots and a combination of halftone dots and lines that have been used in the past, and overprinting with a light-colored transparent ink that does not allow reproduction of decorative patterns such as tint block and color pattern. It is one of the camouflages of technology that has been used in the past.

Further, the surface has a spectral reflectance of at least 40.
% Or more of the base material, the visible information is formed by the colored ink layer on the base material, and the white layer is formed by superimposing at least a part of the visible information to increase the spectral reflectance, thereby making a copy at the time of copying. Increasing the amount of light reflected by the machine light source to make it difficult for the photoconductor of the color copying machine to recognize it due to the influence of certain color separation components of the three primary color components obtained from the colored ink layer formed on the substrate. Color reproduction is not performed faithfully, and the effect of the difference in halftone dot reproducibility that utilizes the reproducibility characteristics of color copiers by forming the printed image that is the visible information by the density of halftone dots is combined. Also, there is Japanese Patent Laid-Open No. 7-68981 (named “counterfeit-proof printed matter”). Since this anti-counterfeit printed matter uses the color change of the copy by increasing the reflectance by using a white layer etc., the color change of the copy has a color characteristic when viewed in the spectral reflectance curve in the visible region. The position of the peak of the spectral reflectance shown is in the same wavelength range as the original printed matter, and the anti-counterfeiting effect is improved by combining the conventionally known density of halftone dots.

In any case, at present, color copiers are being digitized, and the functions of the copiers themselves have been remarkably improved by improving the resolution of the color copiers and providing a color correction function. In the above-mentioned anti-counterfeit printed matter, the check function against color copy is lowered, and a sufficient anti-counterfeiting effect cannot be obtained, and more forgery and copy preventing measures for copying using a color copying machine are desired. Was there.

[0005]

As described above in detail, in the case of the conventional anti-counterfeit printed matter, halftone dots, line drawings, lines and the like are obtained when copying using the current color copying machine. It is difficult to reliably prevent counterfeiting by a color copying machine because the copying machine itself has limitations such as the size and the pitch of the constituent pattern and the functions such as the resolution of the copying machine itself are improved.

Further, in the copy prevention technique utilizing the difference in reflectance of the colored ink layer, a higher copy which has a copy preventing effect only by the difference in color reproducibility without combining the density of halftone dots. Prevention technology was required.

The present invention eliminates the disadvantages of anti-counterfeit printed matter for copying using these conventional copying machines, and performs color adjustment over a wide range with the high performance of copying machines. What is obtained in simple single-layer printing by the optical interaction of the two-layer structure between the colored printing layer that forms the second printed image area and the printing layer that is made of a printing ink that is transparent and consists of fine color pigments. A special optical effect for a copying machine, which could not be achieved, is realized by forming a printed image of a two-layer structure, and the difference in hue between the original printed matter and the copied matter is made noticeable, thereby making it possible to construct an arbitrary image. Without being restricted by the shape and pitch of factors,
(EN) Provided are a copy-preventing printed matter which can surely prevent forgery by a color copying machine, and a method for producing the same.

[0008]

In order to achieve the above-mentioned object, the present invention provides a printed matter comprising first, second and third printed image portions formed on a substrate such as paper and film. Then, the second print image portion and the third print image portion have a color-matching relationship, and are formed so as to display an arbitrary specific image in combination, the first print image portion, A printed matter configured to have a color that is the same as a color obtained by color copying the second print image portion, wherein the second print image portion is a colored print of a part of an arbitrary specific image. It is a two-layer structure in which a lower layer is formed with ink, and the same image as the lower layer is formed with a transparent printing ink so that the same image as the lower layer is completely overlapped. Copy-preventing printed matter, characterized in that only the third printed image portion remains, and A method of making a copy preventing the printed material.

In the above structure, the remaining image displays a warning pattern, and a copy-preventing printed matter,
And a method for producing the copy-protected printed matter.

Further, the present invention is a printed matter comprising first, second and third print image portions formed on a substrate such as paper or film, wherein the first print image portion is optional. A specific image is displayed, and the second print image portion is formed to have a color that is the same as the color when the color copy is made, and the second print image portion and the third print image portion are formed. A printed matter formed in a color-matching relationship, wherein the second printed image portion forms an underlayer of any specific image with colored printing ink, and the same image as the underlayer so as to completely overlap the underlayer. Is a two-layer structure in which an upper layer is formed with a colored printing ink having transparency, and by color copying, it is integrated with the first printed image portion having a color matching relationship to form another new meaningful image. Forming a copy-preventing printed matter, which is characterized by forming It is that way.

The structure of the second printed image portion, which is particularly effective, has a two-layer structure in which the lower layer is formed of a yellow printing ink and the upper layer is formed of a transparent blue printing ink. And a method for producing the copy-protected printed material.

It should be noted that the arbitrary specific image includes characters, symbols,
A copy-preventing printed matter characterized by a face image or other meaningful information, and a method for producing the copy-preventing printed matter.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The copy-preventive printed material of the present invention is a printed material obtained by forming first, second and third printed image portions on a printing substrate, wherein the first printed material The image portion is configured to have a color that is the same as the color when the second print image portion is color copied, and the second print image portion and the third print image portion have a color matching relationship. None, a printed matter that is combined to display any specific image, the second print image portion, to form a lower layer by printing a part of the arbitrary specific image with colored printing ink, Since the same image as the lower layer is printed with a colored printing ink having transparency so as to completely overlap with the lower layer to form a two-layer structure in which the upper layer is formed, the specific image is formed by color copying. The second print image area that was used is the same color as the third print image area. Changes in color forming the engagement, only the third print image portion is a means of preventing copying by remaining.

Further, the first print image portion is formed so as to display an arbitrary specific image and to have a color that is the same color as the color when the second print image portion is color-copied. The second printed image portion and the third printed image portion are printed matter on which a background having a color matching relationship is formed, and the second printed image portion is formed by printing an arbitrary image with colored printing ink. A lower layer is formed, and the same image as the lower layer is printed with a colored printing ink having transparency so as to completely overlap with the lower layer to form a two-layer structure in which the upper layer is formed. The first print image portion is combined with the previously displayed specific image and integrated to form another new meaningful image, which serves as a copy prevention means.

That is, a part of the illumination light emitted from the light emitting portion of the color copying machine is transmitted through the transparent colored ink layer of the upper layer of the printed image layer forming the two-layer structure and the lower layer of the image layer. It is difficult to visually recognize by arriving at a colored printing ink of a different hue than the upper layer to be formed or an ink layer of a similar hue, and then reflected to emphasize the information of the hidden print image layer of the lower layer. As a result, a new image which cannot be visually confirmed can be obtained because it has the same or almost the same color as an arbitrary printed image portion which has been visually recognized in advance.

FIG. 1 is an ordinary dark green color in which an image portion having a two-layer structure of an original printed matter, that is, a second print image portion and a print image portion having the two-layer structure has the same or substantially the same color. An image portion formed of ink, that is, a third print image portion and a brown print image layer that is the same color or almost the same color as that obtained when the print image portion having the two-layer structure is copied, that is, 3 is a diagram showing a spectral reflectance curve of one print image portion.

FIG. 2 shows the spectral reflectance curves of the above-mentioned first, second and third printed image portions of a copy obtained by copying the copy-proof printed matter according to the present invention with a color copying machine.

500 to 6 which have the highest relative luminous sensitivity to the human eye
In the wavelength region of 00 nm, the print image part having the two-layer structure and the image part having the same color or almost the same color as the print image part having the two-layer structure show spectral reflectance curves of the same hue, Although it is perceived by the human eye to be almost the same color, the spectral reflectance of the brown print image portion that is the same color as or almost the same as the color obtained when the print image portion having the two-layer structure is copied is The reflectance is higher than the spectral reflectances of the two images, and the images are perceived by human eyes as different hues.

On the other hand, in a copy obtained by copying the copy-proof printed matter according to the present invention with a color copying machine, the printed image portion having the above-mentioned two-layer structure in the wavelength region of 500 to 600 nm, which has the highest relative luminous efficiency for human eyes. And the spectral reflectance of the brown print image portion that is the same color or almost the same color as the color obtained when the print image portion of the two-layer structure is copied shows a spectral reflectance curve of the same hue. , But the spectral reflectance of the image portion formed by a normal dark green ink that is the same or almost the same as the display color of the printed image portion of the two-layer structure has It shows a lower reflectance than the spectral reflectance of the two images and is perceived by the human eye as a different hue.

That is, the copy-preventing printed matter in which the three types of print image portions according to the present invention are combined is color-copied so that one set of the same hue becomes a combination of different sets of the same hue. Since the image difference between the original printed matter and the copied matter can be easily visually recognized, it is effective in preventing copying.

The ink colors of the lower layer and the upper layer of the double-layered printed image portion used in the present invention can be arbitrarily set as required, but in the present invention, the combination as a copy-preventing ink is particularly effective. As the lower layer ink,
It is a normal yellow ink, and the upper layer ink is a blue type ink composed of fine particle pigments having a complementary color relationship with the lower layer ink.

Further, as the arbitrary specific image used in the present invention, a halftone dot, a parallel line, a solid or other image forming element is applied, but the effect of the present invention is in the form of the image forming element. There is no restriction.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings of the embodiments.

(Embodiment 1) FIG. 3 is a view showing an embodiment of a method for producing a copy-proof printed matter according to the present invention. First,
Mark "x" on the base paper (1) with a yellow offset ink of UV cure type flash dry carton P series manufactured by Toyo Ink Co., Ltd. so that it becomes a part of the facial image of a person having gradation. Printing is performed with a pattern having an arbitrary halftone dot shape, number of lines and area ratio to form a lower print image layer (2), and then the composition shown in the following table on the lower print image layer (2). With a transparent blue-based printing ink consisting of a proportion of an inorganic pigment, the exact same image as the image forming the lower layer is printed so as to completely overlap the lower printed image layer, and the upper printed image layer ( 3) is formed to form a second printed image portion (4) having a two-layer structure.

Next, it is combined with the image of the second print image section (4) to form a human face image having gradation.
An image having a continuous halftone dot shape, a number of lines and an area ratio which is not unnatural with the second print image portion (4) is darkened by applying the same or almost the same color as the display color of the second print image portion. A person who prints with a green printing ink to form a third print image portion (5) and further comprises the second print image portion (4) and the third print image portion (5). Of the face image other than the positive image and the background part other than the second and third print image parts have the same color as the display color when the second print image part (4) is color copied or Since the copy-preventing printed material (7) according to the present invention is constituted by printing with a brown-based printing ink having almost the same color to form the first printed image portion (6), the produced original printed material ( In 7), the face image of the person is noticeable.

[0026]     (table)     Ultra fine particle composite oxide pigment dipyroxide       TM color # 3410 [manufactured by Dainichiseika Kogyo KK] 30 parts by weight     Acrylate monomer and oligomer resin 70 parts by weight     Polymerization inhibitor (methylhydroquinone) 0.1 parts by weight (outside ratio)     UV polymerization initiator 3 parts by weight (outer ratio)

FIG. 4 shows changes in the image when the copy-preventing printed matter (7) of the present invention having the above-mentioned structure is made by a commercially available color copying machine. When a copy-proof printed matter (7) according to the present invention is produced by a commercially available color copying machine, even if the density is adjusted by operating the color correction function attached to the color copying machine, the original printed matter is The image forming the second print image portion (4) forming a part of the face image is yellow due to the influence of the yellow ink printed on the lower print image layer (2). Copied with a taste, the difference in color from the third printed image portion (5) becomes noticeable, and further, the first printed image portion (6).
By making the color of the background portion equal to, a duplicate (8) is obtained in which only a part of the face image of the person forming the third print image portion is visually recognized. In other words, the "x" mark formed in the second print image portion will be recognized in the human face image.

That is, the copy obtained by copying the copy-proof printed matter according to the present invention with a commercially available color copying machine is
When compared with the original printed matter, it is possible to determine the authenticity by the color change of a part of the image, and the part that formed the human face image disappears by copying, and the "x" mark appears in the face image. By visually recognizing and giving a warning pattern, it is a means for easily discriminating whether or not the original printed matter is provided with the proper identification information. This is because the present invention utilizes the change in color that is not restricted by the size of the dots, lines, lines, etc., which are the components of the image, or the pattern and pitch of the components. Forgery and alteration due to copying using a machine can be reliably prevented.

FIG. 5 is a copy-proof printed matter (7) according to the present invention.
FIG. 3 is a schematic cross-sectional view of the printed matter constituting the I-I direction.

(Embodiment 2) FIG. 6 is a view showing another embodiment of the method for producing a copy-proof printed matter according to the present invention. First, on the base paper (9), UV made by Toyo Ink Co., Ltd.
With the yellow offset ink of the cure-type flash dry carton P series, a part of the designed character image "copy" is printed and the lower print image layer (10a,
10b, 10c), and then the lower layer is printed on the lower printed image layer (10a, 10b, 10c) with a transparent blue-based printing ink composed of an inorganic pigment having a mixing ratio shown in the above table. An image exactly the same as the image to be formed is printed so as to completely overlap the image layer forming the lower layer to form the upper print image layers (11a, 11b, 11c) to form a two-layer structure. Print image part (12a, 12b,
12c) is formed.

Next, the second print image portions (12a, 1)
2b, 12c) so that the designed character image of "positive" (13) is combined with the designed image of "copy" and the second printed image portion (12a, 12b). , 12c) is printed with a brown-based printing ink whose color is the same as or nearly the same as the color when the color is copied, to form a first print image portion (13), and further, the second print image portion. (12a, 12b, 12c) images and the image of the first print image portion (13) in the margin portion other than the designed character image "copy", which is referred to as the designed "copy" An image (14) for camouflaging a character image is printed with a dark green printing ink that is the same or almost the same color as the display color of the second print image portion (12a, 12b, 12c), and the third print image is printed. Forming part (14) In Rukoto, since the configuration of the copy prevention printed matter according to the present invention (15), the original of the printed matter created (15), was designed of "positive"
The character image is markedly visible.

FIG. 7 shows a change in the image when the copy-preventing printed matter (15) of the present invention having the above-mentioned structure is made into a copy (16) by a commercially available color copying machine. When a copy-proof printed matter (15) according to the present invention is produced by a commercially available color copying machine, the original printed matter is designed even if the color adjustment function provided in the color copying machine is used to adjust the density. The image, which is the second print image portion (12a, 12b, 12c) that constitutes a part of the character image of "printed", is printed on the lower print image layer (10a, 10b, 10c). A third print image portion (14) that is copied yellowish under the influence of a yellow ink and has the same or almost the same color as the second print image portions (12a, 12b, 12c). The color difference between the first print image part (1
3) By matching the color of the designed character image of "positive" with the first and second print image parts, the designed character image of "copy" is visually recognized. A copy (16) is obtained.

That is, the copy obtained by copying the copy-proof printed matter according to the present invention with a commercially available color copying machine is
When compared with the original printed matter, the authenticity can be discriminated by the color change of a part of the image, and the designed character image of "copy" which was latentized by copying is visually recognized and the warning pattern is displayed. By giving it, it is a means for easily discriminating whether or not the original printed matter is provided with the proper identification information. This means that the present invention
Forgery and alteration by copying using a copying machine because the color change is used without being restricted by the size of the dots, lines, lines, etc., which are the components of the image, or the configuration pattern and pitch. Can be reliably prevented.

FIG. 8 shows a copy-proof printed matter (1) according to the present invention.
FIG. 5 is a schematic cross-sectional view taken along line I-I of the printed matter constituting 5).

Although the embodiments of the copy-preventing printed matter of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various changes can be made without departing from the scope of the present invention. is there.

[0036]

As described above, even if an attempt is made to make a counterfeit product or a modified product by copying the printed matter obtained by the present invention using a color copying machine, the copy of the copy-prevented printed matter of the present invention is obtained. , The hidden image information, which is difficult to see just by looking at the original printed material, is copied and displayed, so that any meaningful information is visualized, or a part of the meaningful information that has been seen is visible. By disappearing and copying as another meaningful information, it is possible to easily visually determine that it is a copy.

Furthermore, the technique of the present invention relies on the optical effect of two printed image layers, and is not limited by the shape of the pattern, the width of the line, the number of dots of the halftone dot, the pitch, etc. It is a printed matter that hides or discloses arbitrary image information for the first time when it is placed on a copying machine, so it can be easily identified as a copied matter by the color change of the image part or the appearance of a warning image or the like. . Further, a complete copy prevention effect can be obtained by using any type of copying machine which has a resolution and a color correction function which are currently on the market.

[Brief description of the figure]

FIG. 1 shows the spectral reflectance curves of the first, second and third printed image areas of the copy protected print of the present invention.

FIG. 2 shows the spectral reflectance curves of the first, second and third printed image areas of the color copy of the present invention.

FIG. 3 is a diagram showing a method for producing a copy-preventing printed matter according to the present invention of Example 1.

FIG. 4 is a diagram showing changes in Example 1 when a copy is manufactured using a commercially available color copying machine.

FIG. 5 is a schematic cross-sectional view taken along line I-I in the first embodiment.

FIG. 6 is a diagram showing a method for producing a copy-preventing printed material according to the present invention of Example 2;

FIG. 7 is a diagram showing changes in Example 2 when a copy is produced using a commercially available color copying machine.

FIG. 8 is a schematic cross-sectional view in the II direction of the second embodiment.

[Explanation of symbols]

1, 9 Base paper 2 Lower layer 3 of the second printed image portion of Example 1 Upper layer 4 of the second printed image portion of Example 1 Second printed image portion 5 of Example 1 Third layer of Example 1 Printed image part 6 of Example 1 First printed image part 7 of Example 1 Printed matter 8 and 16 of Example 1 of copy-proof printed matter according to the present invention Lower layer 11 of second printed image section of Example 2 Example 2 Upper layer 12 of the second print image portion of the second print image portion 13 of the second embodiment First print image portion 14 of the second embodiment Third print image portion 15 of the second embodiment Copy protection printed matter according to the present invention Printed matter of Example 2

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-55-36873 (JP, A) JP-A-7-266770 (JP, A) JP-A-8-282084 (JP, A) Actual development Sho-61- 204766 (JP, U) Patent 3044152 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41M 3/14 B42D 15/10 G03G 21/04

Claims (10)

(57) [Claims] 1. A printed matter comprising first, second and third print image portions formed on a substrate, wherein the first print image portion is a color copy of the second print image portion. The second print image part and the third print image part are in a color-matching relationship so as to display an arbitrary specific image by combining them. In the printed matter, the second print image portion forms a lower layer of a part of an arbitrary specific image with a colored printing ink, and the same image as the lower layer is formed so as to completely overlap the lower layer. It is a two-layer structure in which the upper layer is formed of a colored printing ink having transparency,
A copy-preventing printed matter, wherein only the third printed image portion remains after color copying. 2. The copy-protected printed matter according to claim 1, wherein the remaining image displays a warning pattern. 3. A printed matter comprising first, second and third print image portions formed on a substrate, wherein the first print image portion displays an arbitrary specific image, and The second print image portion is formed so as to have a color that is the same as the color when color-copied, and the second print image portion and the third print image portion are printed matter having a color matching relationship. , The second print image portion forms a lower layer of a specific printing image with a colored printing ink, and the same image as the lower layer is printed with a colored printing ink having transparency so as to completely overlap the lower layer. A two-layer structure in which an upper layer is formed, and by performing color copying, it is integrated with the first print image portion having a color matching relationship to form another new meaningful image, which is a copy-preventing printed matter. . 4. The second printed image portion has a two-layer structure in which a lower layer is formed with a yellow printing ink and an upper layer is formed with a transparent blue printing ink. The copy-protected printed matter according to 1, 2, or 3. 5. The copy-protected printed matter according to claim 1, wherein the arbitrary specific image is a character, a symbol, a facial image, or other meaningful information. 6. A printed matter comprising first, second and third print image portions formed on a substrate, wherein the first print image portion is a color copy of the second print image portion. The second print image part and the third print image part are in a color-matching relationship so as to display an arbitrary specific image by combining them. In the printed matter, the second print image part forms a lower layer of a part of an arbitrary specific image with a colored printing ink, and the same image is formed on the lower layer so as to completely overlap the lower layer. It is a two-layer structure in which the upper layer is formed of a colored printing ink having transparency,
A method for producing a copy-preventing printed matter, characterized in that only the third printed image portion remains by color copying. 7. The method for producing a copy-proof printed matter according to claim 6, wherein the remaining image displays a warning pattern. 8. A printed matter comprising first, second and third print image portions formed on a base material, wherein the first print image portion displays an arbitrary specific image, and The second print image portion is formed so as to have a color that is the same as the color when color-copied, and the second print image portion and the third print image portion are printed matter having a color matching relationship. , The second print image portion forms a lower layer of a specific printing image with a colored printing ink, and the same image as the lower layer is printed with a colored printing ink having transparency so as to completely overlap the lower layer. It has a two-layer structure in which an upper layer is formed, and by color copying, it is integrated with the first print image portion having a color matching relationship to form another new meaningful image. Method for producing copy-protected printed matter. 9. The second printed image portion has a two-layer structure in which a lower layer is formed with a yellow printing ink and an upper layer is formed with a transparent blue printing ink. 5. The method for producing a copy-protected printed matter according to 5 or 6. 10. The arbitrary specific image is a character, a symbol,
The method for producing a copy-protected printed matter according to claim 5, 6 or 7, wherein the image is a face image or other meaningful information.