WO2002090121A1

WO2002090121A1 - Forgery preventing printed matter having flip-flop or color flip-flop characteristic

Info

Publication number: WO2002090121A1
Application number: PCT/JP2002/003495
Authority: WO
Inventors: Masanori Nakai
Original assignee: National Printing Bureau, Incorporated Administrative Agency
Priority date: 2001-04-26
Filing date: 2002-04-08
Publication date: 2002-11-14
Also published as: DE60222113T2; EP1389537B1; JPWO2002090121A1; JP4192233B2; EP1389537A1; ATE371539T1; DE60222113D1; DK1389537T3; EP1389537A4

Abstract

On a print substrate, after a first print image (3) is formed with a gold ink, a second print image (5) is printed with a color ink in such a manner that a first parallel line tint (4A) in the image (3) is overlapped with a second parallel line tint (6A) of an extremely small character group printed with a color ink in the second print image (5). The first print image (3) consists of a first background image (4) composed of the first parallel line tint (4A) and the second parallel line tint (4B) and a first latent image (3A) (character I ) while the second print image (5) consists of a second background image (6) composed of the second parallel line tint (6A) and a second latent image (5A) (character O ) where the second background image (6) is printed by reverse printing. The first latent image (3A) is visible when illuminated with a scattered light while the second latent image (5A) is visible when illuminated a regular reflection light. Thus, it is possible to determine whether true or false, thereby improving the forgery prevention effect.

Description

Description Anti-counterfeit printed matter with flip-flop or color flip-flop

The present invention relates to anti-counterfeit prints, and more particularly to anti-counterfeit prints having flip-flop properties or color flip-flop properties.

Countermeasures to prevent counterfeiting and alteration are important factors in printed materials such as banknotes, stock certificates, bonds, and other securities, various certificates, and important documents. Therefore, a pattern is formed on the printing surface of such a printed matter by extremely minute images. A technique that has been used as a countermeasure to prevent forgery or falsification of these printed materials is to apply a collective pattern of characters with a character angle of 1 mm or less called fine characters to printed materials, or to add some processing to printed materials. In some cases, a latent image that cannot be recognized by the naked eye can be viewed, for example, a method using a latent image intaglio, a functional ink whose color is not normally reproduced by a copying machine, and an anti-copy image.

Countermeasures against forgery and falsification using small characters make it difficult to produce counterfeit products with the same pattern as the real one by making the pattern finer and more complex, and are reproduced by extraction using photoengraving equipment or copiers. By using difficult colors, the role as a countermeasure against forgery is enhanced. Furthermore, by forming a large number of minute characters on the printed surface, it is possible to form a tint block pattern that is effective in preventing forgery and falsification, and at the same time, it can apply a large amount of character information that is essential for printed products There is also an advantage.

In addition, by observing with a magnifying glass or the like during the market distribution process, ordinary citizens can easily identify whether the text and shape of the small characters are genuine. For this reason, small characters are widely used worldwide in the design of printed securities and the like. In particular, in printed matter such as banknotes, stock certificates, and bonds that have a monetary value, small letters are used as patterns, and are still an important element in designs that give a sense of luxury.

Therefore, in printed materials such as banknotes, stock certificates, bonds, and other securities, various certificates, and important documents, small characters are treated as an indispensable pattern in design. You.

However, recently, with the advent of high-performance or high-performance photoengraving apparatuses or copiers, there has been a problem that it is not possible to achieve a sufficient forgery and falsification prevention effect only by using minute characters.

On the other hand, in recent years, for printed matter such as important documents requiring security, anti-counterfeiting elements and printing technology having a new design property and a high anti-counterfeiting effect have been desired. Therefore, in recent years, by adding special glittering powders such as interference force, oxidized flake force, pigment coated aluminum flake, optical change flake, etc. to the INK paint, the color change depending on the viewing angle. Many printed materials with excellent color and flip-flop characteristics, and those with security elements such as holograms whose images change depending on the viewing angle, have come to appear.

Here, the color flip-flop property means the angle dependence of the color, and is the property that the brightness and color of the coating surface change depending on the viewing angle. In particular, the property of changing color brightness is called flip-flop property, and the property of changing hue is called color flip-flop 'I' raw.

As a technology using a special glittering powder exhibiting such properties, a polarizing ink layer containing a pearl pigment is printed on the entire surface of the base sheet in plain paper, and a straight line or a set of curves is drawn from above. An abstract pattern or character pattern consisting of a body is printed with a color ink layer, and the incident light from the front side is regularly reflected in a certain direction by the nozzle pigment of the polarizing ink layer to produce gloss, and abstraction by the color ink layer There is a technology (see, for example, Japanese Utility Model Application Laid-Open No. 5-76765) that allows a pattern or a character pattern to appear to float.

In addition, as a technology using metallic glossy ink, a latent image consisting of fine constituents, which are halftone dots of 85 lines and 30%, is printed on a substrate using silver ink, in particular. In the margins, halftone dots of 150% lines and 30% denser than the latent image are printed, and furthermore, on these printed surfaces, copy-protected prints with printed patterns such as color prints and ground pattern (See Japanese Patent Application Laid-Open No. 57-23095).

Alternatively, an authenticity discriminating portion that contains light-transmissible optically variable flakes and displays a plurality of colors according to the angle of incident angle is provided at an arbitrary position on the base material, and at least the discriminating portion of the base material is provided. Is partially transparent, reflected light from the authenticity discriminator and its complementary color An information carrier for preventing forgery and alteration (for example, see Japanese Patent Application Laid-Open No. H8-58224) has been proposed which utilizes the property that two of the related transmitted lights change depending on the observation angle of the displayed color. .

Furthermore, by combining a plurality of flaky colored pigments having different color tones, or by combining a flaky colored metallic pigment with an organic pigment having a different color from the pigment, a coating film having excellent color and flip-flop properties is formed. There has been proposed a color-flip-flip-type paint that can be used (see, for example, Japanese Patent Application Laid-Open No. Hei 7-229944).

In addition, as a copy protection technology using the density of halftone dots, one image is formed with a dense halftone dot area ratio of two lines in two images, and the other image is formed with a high density of coarse lines. There is a technique of forming an area ratio substantially the same as the halftone dot area ratio.

The latent image of the first latent image portion formed on the base material is printed with halftone dots of about 150% lines, and the background around the latent image is printed with halftone dots of about 60% lines. Print, and then print the latent image of the second latent image part adjacent to the first latent image part with halftone dots of about 60 lines at 10% and the surrounding background at 150% lines at 10% A copy protection technique formed by halftone dots (for example, see Japanese Patent Application Laid-Open No. 6-71156) has also been proposed.

By the way, as described above, with the progress of color copiers in recent years, it has become possible to make elaborate copies that are difficult to distinguish from genuine ones, and counterfeiting of securities, checks, banknotes, etc. using copiers has occurred . These copied and counterfeit prints can be identified as fake by a skilled appraiser—a special appraiser. However, in the case of securities, etc., there are many types and wide distribution, and there are many opportunities for ordinary citizens to handle them. Not practical. Therefore, there is a need for a method of authenticity determination that can be easily and instantly determined by ordinary citizens.

However, the anti-counterfeiting method or the authenticity discrimination method using an ink containing a special glittering powder increases the cost of the glitter because the glitter powder itself is expensive. In addition, such printed materials utilize only the property of the angle dependence of color due to their glitter, and obtain a similar or similar glitter powder and knead it with a tincture and a paint. It is easily forged. In other words, it simply depends on the angle of color. The authenticity of the printed matter using ink that uses brilliant powder that has a certain level of identity is easily forged, and it is difficult for ordinary citizens to make an easy and instantaneous judgment.

In addition, as described above, with the advancement of color printers in recent years, copiers have become more sophisticated, making it possible to make sophisticated copies that are difficult to distinguish from genuine ones. Prevention techniques tend to be less effective.

In order to solve such a problem, a printing plate (C) having a desired gradation, a printing plate (M), a printing ink corresponding to the printing plate (Y), and a printing plate (K) having a desired gradation. By forming an image using any corresponding light-absorbing ink, the first visibility image changes to the second visibility image when the viewing angle is changed. (See Japanese Patent Application No. 10-36592, filed in Japanese Patent Application Laid-Open No. H10-209, filed on Oct. 31, 2009).

Further, in one of the first visibility information image area (18) and the background image area (19), a glittering shielding layer having a dense base material hiding ratio is formed, and in the other, a coarse base material hiding ratio is formed. Forming a brilliant shielding layer having a dense base material concealing rate in both the second visibility information image area (20) and the background image area (21); By forming an extremely coarse shielding layer with a high absorption of visible light at an extremely coarse substrate hiding rate on at least a part of the glittering shielding layer with a high density of the base material, the visibility information changes when the observation angle is changed. A carrier (see Japanese Patent Application No. Hei 11-307052 previously filed by the present applicant) has been proposed.

In general, anti-counterfeit prints with optical changes require expensive and specialized equipment and materials. On the other hand, the technologies proposed in Japanese Patent Application Nos. 10-36572 and 9-110702 apply general materials and manufacturing methods. Excellent in terms of cost reduction.

Further, these are formed by a complicated image structure, and can be authenticated instantaneously, and are excellent in anti-counterfeiting property and authenticity discriminating property. Furthermore, unlike holograms, etc., it can form images without using special adhesives etc. on the printing substrate, so no additional manufacturing process is required, and it has excellent mechanical strength in the distribution process There are advantages.

However, in this anti-counterfeit printed matter, the basic image components are flat screen or plain. In general, security prints have a sublime sensation of luxury. The design is required, and a flat net or a sunset is not enough. In addition, security printed matter is required to have a counterfeiting prevention effect in addition to the semantic information of the printed matter itself, such as banknotes, stock certificates, bonds, and other securities, and various certificates. Therefore, in order to effectively use the limited printing area, it is desirable that the forgery prevention element has a plurality of pieces of semantic information.

As described above, the color difference between the printed matter and its color / copies is remarkable without the need for complicated manufacturing processes, and the special glitter material was simply obtained and blended into inks and paints. Alone, it is difficult to reproduce the angle dependence of the color of authentic prints, and the general public can determine authenticity without using any special method or device. The development of a printed matter having semantic information was desired. Summary of the Invention

In view of the above circumstances, the present invention can determine the authenticity of a printed matter without requiring a special device, and has a flip-flop property or a force-flip-flop property capable of obtaining a high forgery prevention effect. An anti-counterfeit print having flip-flop properties according to the present invention, which aims to provide an anti-counterfeit print, is an anti-counterfeit print having a print image formed on a printing substrate, wherein the print image is A latent image region and a background image region, wherein the latent image region is formed by a printing layer containing an ink or paint containing at least one brilliant material, and the background image region is , A printing layer containing an ink or paint containing one or more glitter materials and a halftone printing layer containing an ink or paint containing one or more glitter materials alternately at predetermined intervals. repeat When the observation angle is in the diffused or scattered light region with respect to the illumination light source, the latent image is formed such that the observation angle is in the direct reflection light region with respect to the illumination light source. Is also easily visible.

Here, the background image area may include a line pattern including at least one of a horizontal stripe pattern, a vertical stripe pattern, a concentric circle pattern, and a concentric polygon pattern, a chip pattern, or a lattice pattern.

In addition, the anti-counterfeit printed matter having a color flip-flop opening property according to the present invention is a stamp. A first print image and a second print image formed on a printing substrate, wherein the first print image has a first latent image area and a first background image area, The first latent image area is formed of a printing layer containing an ink or a paint containing one or more brilliant materials, and the first background image area is formed of one or more brilliant materials. A solid printing layer containing the blended ink or paint, and a halftone printing layer containing the ink or paint containing one or more glittering materials are formed so as to be alternately repeated at predetermined intervals; The second print image has a second latent image area and a second background image area, and the second latent image area is a blank area for an unprinted area or a printed area. The second background image area is an area where a print is formed, and the second background image area is a minute character mark including colored ink. And a non-printing layer are formed so as to be alternately repeated at a predetermined interval, and on the base printing layer in the first background image area in the first printing image, the second printing image The fine character print layer of the second background image area is formed so as to be superimposed, and the first latent image is formed of the second latent image image in the diffuse light or scattered light area with respect to the illumination light source. Wherein the second latent image is more easily recognized than the first latent image in an area where the observation angle is specularly reflected with respect to the illumination light source. I do.

Here, the first background image region and the second background image region are each a line pattern including at least one of a horizontal stripe pattern, a vertical stripe pattern, a concentric circle pattern, and a concentric polygon pattern, a check pattern, or It may include a lattice pattern. Further, the glittering material may include any one of glittering positive powders such as interference force, oxidation flake force, pigment-coated aluminum flake, optically variable flake, or a combination thereof. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1A is a plan view of an anti-counterfeit printed matter according to one embodiment of the present invention, in which a first printed image and a second printed image are printed on a base material, and FIG. FIG. 1C is a plan view illustrating a state of visually recognizing a latent image of a first print image according to the embodiment. FIG. 1C is a plan view illustrating a state of visually recognizing a latent image of a second print image according to the embodiment.

FIG. 2A shows a background image in a first printed image of a forgery-prevented printed matter according to the embodiment. FIG. 2B is a plan view showing a first print image according to the embodiment.c FIG. 3A is a background image in a second print image of the forgery-prevention printed matter according to the embodiment. FIG. 3B is a plan view showing a second print image according to the embodiment. C FIG. 4A is a longitudinal section taken along line Y--Y in FIG. 2B. FIG. 4B is a cross-sectional view showing a forgery-preventive printed matter in which a first printed image is printed on a substrate according to FIG.

FIG. 3 is a vertical cross-sectional view taken along the line YY in 1 A, showing a forgery-preventive printed matter obtained by printing a first printed image and a second printed image on a base material according to the same embodiment.

FIG. 5 is a plan view showing a background image pattern in a first print image according to another embodiment of the present invention. FIG. 5A is a vertical stripe pattern, FIG. 5B is a concentric circle pattern, and FIG. FIG. 5D is a plan view showing a check pattern.

1 Anti-counterfeit printed matter

2 Printing substrate

3 First print image

3 A First latent image

4 First background image

4 A 1st line (Kinbe evening printing)

4 B Wire dot printing area

5 Second print image

5 A Second latent image (white print of small characters)

6 Second background image

6 A Second line (small character group) Detailed description of the invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The configuration of a printed matter according to an embodiment of the present invention will be described with reference to plan views of FIGS. 1A to 1C. The anti-counterfeit printed matter 1 according to the present embodiment shown in FIG. 1A prints the first print image 3 shown in FIG. 1B and then superimposes the second print image 5 shown in FIG. 2B. Tatami printed.

The first printed image 3 is an image printed on a printing substrate by using a glitter material-containing ink. Therefore, the first latent image 3A is drawn as shown in FIG. 1B.

The second print image 5 is printed on the first print image 3 by using a colored ink, and the second latent image 6A is drawn as shown in FIG. 1C.

By having such a configuration, the printed matter 1 of the present embodiment can change the observation angle from the diffused (scattered light) region to the specularly reflected light region with respect to the illumination light source. The first latent image 3A changes from visibility to non-visibility, and the second latent image 6A in the second printed image 5 changes from non-visibility to visibility.

Also, when the observation angle of the printed matter 1 is changed from the specularly reflected light area to the diffused light (scattered light) area with respect to the illumination light source, the first latent image 3A in the first printed image 3 becomes invisible To the visibility, and the second latent image 6A in the second printed image 5 changes from the visibility to the non-visibility.

Next, the first print image 3 and the second print image 5 will be described in detail.

First, as shown in FIG. 2B and FIG. 4A, a first printed image 3 is formed on a printing substrate 2 by using a glitter material-containing ink (for example, a gold ink).

Thereafter, as shown in FIGS. 3B and 4B, a second print image 5 is formed on the first print image 3 by using a colored ink.

The first printed image 3 includes a first background image 4 and a first latent image 3A (shown in FIG.2B) as shown in FIGS.2A, 2B and 4A. The letter "I"). The first background image 4 is the first line 4A of the gold ink printing and the gold dot printing of the gold ink printing (the metal dot printing) with the high halftone ratio (for example, 70 to 80%). Each of the areas 4B and 4B has a fixed width and is formed of a horizontal stripe pattern in which these are alternately arranged. Further, the first latent image 3A is formed by gold ink printing. Here, the metal halftone dot printing area 4B corresponds to a halftone printing area, and it is assumed that the area ratio of halftone dots is higher than 0% and lower than 100%.

As shown in FIGS.3A, 3B, and 4B, the second printed image 5 has a second background image 6 and a second latent image 5A (shown in FIG. Character "0"). The second background image 6 is to be printed with a small character group of colored ink or a horizontal stripe pattern composed of a second line 6A having a constant width of a low halftone dot ratio (for example, 20 to 30%). Formed with The second latent image 5A is formed by performing outline printing on the second background image 6 composed of a horizontal stripe pattern.

When forming the second print image 5 using the colored ink on the first print image 3 formed using the gold ink, as shown in FIG. 1A and FIG. 1st line in print image 3 (area where gold ink was solid printed) 4 Second line in 2nd print image 5 (fine characters printed by colored ink) on A (Area) Print so that 6 A overlaps.

As shown in FIG. 1B, the first printed image 3 is composed of a first latent image 3A on which a letter “I” is drawn with gold ink printing as shown in FIG. A grayscale difference is generated between the first background image 4 on which the lines are drawn by the gold-ink printing at the halftone dot ratio, and the first latent image 3A can be visually recognized.

Conversely, in the specularly reflected light area, the first latent image 3A cannot be visually recognized because the gray level difference between the first latent image 3A and the background image 4 is small.

As shown in FIG. 1C, the second printed image 5 is printed with a horizontal stripe pattern in which the second line 6A having a low dot ratio of colored ink is drawn as shown in FIG. 1C. A difference in shading occurs between the second background image 6 and the second latent image 5A in which the character `` 0 '' is drawn by white printing on the second background image 6, and the second background image 6 is visible. It is.

In the scattered light region, since the difference in shading between the second background image 6 and the second latent image 5A is small, the second latent image 5A cannot be visually recognized.

As described above, in the printed matter according to the present embodiment, the first latent image 3A becomes visible and the second latent image 5A becomes invisible when the observation angle is in the diffused light (scattered light) region. _c Conversely, when the observation angle is in the specularly reflected light region, the second latent image 5A becomes visible and the first latent image 3A becomes invisible. That is, ordinary people can easily and clearly determine the authenticity of the printed matter with the naked eye by a simple operation without changing the observation angle between the diffused light (scattered light) region and the regular reflection light region. Can be determined. Furthermore, as in the first latent image 3A and the second latent image 5A, the latent images can be formed by different printing methods and by a plurality of different character patterns. A plurality of pieces of semantic information can be provided, and the forgery prevention effect can be further enhanced. In addition, by printing micro-characters on the colored ink printing part such as the second line 6A, it is possible to determine the authenticity by simple means such as a loupe, so the anti-counterfeiting effect is improved at low cost. can do.

The above-described embodiment is an example and does not limit the present invention. For example, in the forgery-preventive printed matter having a color flip-up property according to the above-described embodiment, the first printed image 3 is printed on the printing base material 2 using a glittering material-containing ink such as a gold ink. After the formation, the second print image 5 is formed on the first print image 3 using a colored ink.

However, the present invention is not limited to this case, and even if it is a forgery-prevention printed matter having a flip-up property, in which only the first printed image 3 is formed using the contained ink on the printing base material 2, sufficient counterfeiting can be performed. It has a preventive effect and can be put to practical use. That is, the first background image 4 is formed on the printing substrate 2 as described with reference to FIG. 2A, and the first latent image 3A is formed as shown in FIGS. 2B and 4A. A forgery prevention effect can be obtained only by forming the first print image 3.

Further, in the above embodiment, the horizontal stripe pattern is drawn in the first and second background images 4 and 6. However, the present invention is not limited to this. A vertical stripe pattern as shown in FIG. 5A, a concentric circle pattern as shown in FIG. 5B, and a parallel line such as a concentric polygon pattern as shown in FIG. 5C A pattern, a checkerboard or grid pattern as shown in FIG. 5D, or other patterns may be used. Similarly, when forming only the first print image 3, the first background image 4 includes a line pattern such as a horizontal stripe pattern, a vertical stripe pattern, a concentric circle pattern, a concentric polygon pattern, a check pattern, and a lattice pattern. , Or other patterns may be drawn.

In the above-described embodiment, the second line 6A of the second background image 6 is a line composed of a collection of minute characters. However, the present invention is not limited to this. Lines may be used.

Further, in the above embodiment, a gold ink is used as the glitter ink. However, the present invention is not limited to this, and ink containing a glittering powder such as interference force, oxidation flake force, pigment-coated aluminum flake, and optically changeable flake may be used.

Claims

The scope of the claims

1. A forgery-preventive print having a print image formed on a print substrate, wherein the print image has a latent image area and a background image area,

The latent image area is formed of a base printing layer containing an ink or paint containing one or more brilliant materials,

The background image region includes a printing layer containing an ink or a paint containing one or more glitter materials, and a halftone containing an ink or a paint containing one or more glitter materials.

-Printed layer is formed so that it is alternately repeated with a predetermined interval,

When the latent image is in an area where the observation angle is in a diffused or scattered light region with respect to the illumination light source,

A forgery-preventing printed matter having flip-flop characteristics that is more easily visually recognized than when the observation angle is in the specularly reflected light region with respect to the illumination light source.

2. The flip-flop according to claim 1, wherein the background image area includes a line pattern including at least one of a horizontal stripe pattern, a vertical stripe pattern, a concentric circle pattern, and a concentric polygon pattern, a check pattern, or a lattice pattern. Anti-counterfeiting printed matter with

3. A forgery-preventive printed matter comprising a first printed image and a second printed image formed on a printing substrate,

The first printed image has a first latent image area and a first background image area, and the first latent image area is an ink or paint containing one or more glittering materials. Formed with a printing layer containing

The first background image area includes a base printing layer containing an ink or a paint containing one or more glittering materials, and a halftone printing layer containing an ink or a paint containing one or more glittering materials. Are formed so as to be alternately repeated at predetermined intervals,

The second print image has a second latent image area and a second background image area, and the second latent image area corresponds to an unprinted area or a printed area. Area where white print is formed,

The second background image area is formed such that a fine character print layer including a colored ink and a non-print layer are alternately repeated at predetermined intervals,

On the base print layer of the first background image area in the first print image, the micro-character print layer of the second background image area in the second print image is formed by being overlapped. And

When the observation angle is in the diffused light or scattered light region with respect to the illumination light source, the first latent image is more easily recognized than the second latent image,

An anti-counterfeit print having color flip-flop characteristics, wherein the second latent image is more easily recognized than the first latent image in an area where the observation angle is specularly reflected with respect to the illumination light source.

4. The first background image area and the second background image area each include a line pattern, a check pattern, or a lattice pattern including at least one of a horizontal stripe pattern, a vertical stripe pattern, a concentric pattern, and a concentric polygon pattern. The anti-counterfeit printed matter having a color-flip-up property according to claim 3, comprising:

5. The glittering material according to any one of claims 1 to 4, wherein the glittering material includes any one or a combination of glittering positive powders such as interference force, oxidized flake force, pigment coated aluminum flake, and optical change flake. The anti-counterfeit printed matter having any of the colors and flip-flops described in any of the above.