JP3398758B2 - Information carrier for forgery prevention - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of security printed matter requiring anti-counterfeiting effect, that is, banknotes, passports, securities, identification cards, cards, pass tickets, and other valuable printed matter and important documents. , Information formed using a material having high visible light absorption and a glittering material on the base material is derived from the difference in the hiding rate of the material that masks the glittering material formed on the base material or the lower layer, The present invention relates to an anti-counterfeiting or genuine / counterfeit information carrier having an effect of changing depending on an observation angle.

[0002]

2. Description of the Related Art Recently, for printed matter such as important documents requiring security, an anti-counterfeiting element having a new design and a high anti-counterfeiting effect and a printing technique have been desired. For this reason, in recent years, a color flip-flop that causes a color change depending on the observation angle by blending a special glittering powder such as interference mica, oxidized flake mica, pigment-coated aluminum flake, and optical change flake into ink or paint. There are now many printed materials with excellent printing performance and those with optical security elements such as holograms whose images change depending on the viewing angle.

Here, the color flip-flop property means the angle dependence of color, and is the property that the lightness and darkness of the coating film surface and the color change depending on the viewing angle. In particular, the property of changing the lightness and darkness of color is called a flip-flop property, and the property of changing a hue is called a color flip-flop property.

[0004] As a technique utilizing the above-mentioned special glittering powder having such properties, for example, Japanese Utility Model Laid-Open No. 5-7676.
JP-A No. 5-52200 discloses that a polarizing ink layer containing a pearl pigment is printed on the entire surface of a base material sheet in a solid manner, and an abstract pattern or a character pattern composed of a collection of straight lines or curved lines is printed on the colored ink layer. However, it has been proposed that the incident light from the front side is regularly reflected in a certain direction by the pearl pigment in the polarizing ink layer to generate gloss and that the abstract pattern and the character pattern due to the color ink layer appear to float. ing.

Further, as a technique utilizing a metallic luster ink, Japanese Patent Laid-Open No. 20395/1982 discloses a fine constituent which is a halftone dot of 85 lines and 30% on a substrate by using a silver ink. A latent image is printed, a halftone dot of 150 lines and 30% denser than the latent image is printed in a blank portion other than the above latent image, and a print, a tint block, or the like is further printed on these print surfaces. Proposed copy protected prints have been proposed.

Japanese Unexamined Patent Publication (Kokai) No. 8-58224 discloses a genuine / counterfeit discriminating portion which contains optically transparent optically variable flakes and displays a plurality of colors in accordance with the angle of incident light at an arbitrary position on the substrate. It is provided that at least a part of the identification portion of the base material has a light-transmitting property, and the reflected light from the identification portion for authenticity discrimination and the transmitted light having a complementary color relationship with each other have two colors to be displayed. An information carrier for prevention of forgery and forgery that utilizes a change depending on an observation angle has been proposed.

Further, in Japanese Unexamined Patent Publication No. 7-292994, a plurality of scale-like colored pigments having different color tones are combined, or a scale-like colored metal pigment and an organic pigment having a different color from the pigment are combined to obtain a color pigment. A color flip-flop type metallic paint capable of forming a coating film excellent in flip-flop property is described.

Further, the copy protection technique utilizing the density of halftone dots is a well-known technique at present. In two images, one image is formed with a halftone dot area ratio of rough lines and the other image is formed. There is known a printed matter formed with a dense line number and a halftone dot area ratio which is almost the same as the halftone dot area ratio.

For example, in Japanese Utility Model Laid-Open No. 6-71156, the latent image of the first latent image portion formed on a substrate is 150 lines.
Print with 0% halftone dots and set the background around the latent image to 60%.
The lines are printed with halftone dots of about 10%, and the latent image of the second latent image portion adjacent to the first latent image portion is printed with halftone dots of about 60 lines 10%, and the surrounding background is printed. A copy protection technique has been proposed which is formed by halftone dots of about 150% on 150 lines.

Further, with the development of color copying machines in recent years, it has become possible to make sophisticated copies that are indistinguishable from genuine ones, and forgery of securities, checks, banknotes, etc. by copying machines has occurred. These printed / counterfeit printed materials can be easily identified as counterfeit goods by a skilled appraiser or a special appraisal device, but there are many types of securities, etc., and they are widely distributed, making it difficult for ordinary people to handle them. Many. Therefore, it is not a practical means to rely on an expert appraiser or a special appraisal device to make a genuine / counterfeit judgment of all securities, etc., and it is desired that ordinary people can easily and instantly make a judgment. ing.

However, in such a forgery-preventing or authenticity-discriminating printed matter using an ink containing such a special glittering powder, the glittering powder itself is expensive, and the cost of the printed matter is increased. In addition, such printed matter utilizes only the angle-dependent property of color due to its glittering property, and obtains similar or similar glittering powder and kneads it with ink and paint. Is easily forged by. That is, in the forgery prevention or authenticity discrimination printed matter using the ink using the conventional glittering powder having the color angle dependency, the printed matter is easily forged, and the general person can easily and instantly judge the color. Is difficult to do.

Further, as described above, with the development of color copying machines in recent years, the performance of copying machines has increased, and it has become possible to make elaborate copies that are difficult to distinguish from the real ones, making use of the density of halftone dots. It is also true that the effectiveness of prevention technology is decreasing.

In order to solve the above problems, in Japanese Patent Application No. 10-365279 filed by the applicant of the present invention, a plate (C), a plate (M) and a plate (Y) having arbitrary gradations are formed. By changing the observation angle, an image is formed by using any corresponding glitter ink and any ink having high light absorption corresponding to the plate surface (K) having any gradation.
Has applied for a technique for changing the visibility image of the second visibility image into the second visibility image.

As described above, the anti-counterfeit printed matter exhibiting the usual optical change generally requires expensive and special equipment and materials, whereas this application describes general materials and manufacturing methods. Because of its application, it is a printed matter which has excellent cost performance, is formed by a complicated image structure, has an effect of instantaneousness of authenticity discrimination, and has high anti-counterfeiting and authenticity discrimination effects. Also, unlike holograms, etc., because it can be applied to the printing substrate without using a special adhesive, etc., no additional manufacturing process is required,
In addition, there is a feature that mechanical strength in the distribution process is also excellent.

However, the above-mentioned anti-counterfeit printed matter of the present applicant requires four printing plates (colors) in order to form the anti-counterfeit image, and the printed matter expressed in a general process color (four colors). In order to incorporate the anti-counterfeit image therein, at least a 7th (color) or 8th (color) plate surface is required, which complicates the manufacturing process.

From the above, it is not necessary to perform a complicated manufacturing process, and the difference in color tone between the printed matter and the color copy is remarkable, and the special glitter material is simply obtained to obtain the ink and the ink. It is not possible to easily reproduce the angle dependence of color in a real printed matter simply by blending it in a paint, etc., and the general person just picked up an arbitrary printed matter and did not need a special method, and it was easy. There has been a demand for advanced printing technology and printed matter having an optical effect capable of discriminating between true and false.

[0017]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the above-mentioned problems, and its problems are general and relatively inexpensive materials and simple printing. While using the method, the information recognized by the human eye at a specific observation angle provides a forgery prevention information carrier that changes to completely different information by changing the observation angle. .

In general, a color that causes a color change depending on the observation angle by mixing a special glittering powder such as interference mica, oxidized flake mica, pigment-coated aluminum flake, or optically modified flake into ink or paint. An optical security element such as a printed matter having an excellent flip-flop property or a hologram whose image changes depending on an observation angle is formed by using expensive and special materials and devices. In particular, in order to form a security print using a security element such as a hologram, it is necessary to indirectly attach the security print to a base material of the security print by using an adhesive or the like, and an additional step is required. become.

However, the information carrier for preventing forgery according to the present invention uses a general printing method by using a commercially available silver-colored or gold-colored ink containing a relatively inexpensive aluminum piece powder or brass piece powder. By doing so, it becomes possible to directly apply a security image exhibiting a hologram effect to the base material of the security print, and the anti-counterfeiting and authenticity using the advanced anti-counterfeiting technology with excellent cost performance and mechanical distribution strength are provided. It becomes a false discrimination printed matter.

Here, the forgery prevention information carrier according to the present invention is formed by printing a commercially available silver ink, gold ink, or color ink, but is naturally limited to these materials and application methods. Not a thing, if it is a cheap material and a general method that is simple and inexpensive,
The type of glitter material, the type of color material, and the method of applying to the base material are not particularly limited.

[0021]

[Means for Solving the Problems] That is, the present applicant is
As a result of intensive studies to solve the above problems, the inventors have invented the following forgery prevention information carrier.

The present invention changes the observation angle with respect to the illumination light source from the diffused light area to the specular reflected light area, so that the information displayed by the image occupying one area formed from the information image area and the background image area is displayed. Is an information carrier for forgery prevention that changes from visibility to non-visibility, and one of the information image area and the background image area of the information displayed by the image occupying the one area is at least one or more. only the luster material, is formed by concealing layer to hide the substrate with 90% to 100% of the contrast ratio and the other, the only by at least one or more of the luster material, the base material of 70 to 85% contrast ratio An information carrier for forgery prevention, which is formed of a concealing layer that is concealed by.

Here, when the hiding layer for hiding the above base material at a hiding ratio of 90 to 100% is hidden at a hiding ratio of less than 90%, the difference in hiding ratio from the other region is small. Become. That is, in the diffused light region, the difference in color tone formed by the difference in the hiding ratio between the information image region and the background image region becomes small, making it difficult to recognize the information that should be recognized.

On the contrary, when the hiding layer for hiding the above-mentioned substrate at a hiding ratio of 70 to 85% is hidden at a hiding ratio of less than 70%, the difference in hiding ratio with the other region is extremely large. Grows to. That is, in the specular reflection light region, the difference in color tone formed by the reflected light from the hiding layer in the information image region and the background image region becomes large, and information that should not be recognized is recognized.

When the hiding layer for hiding the base material with a hiding ratio of 70 to 85% is covered with a hiding ratio higher than 85%, the difference in hiding ratio from the other region becomes small. That is, in the diffused light area, the difference in color tone formed by the difference in the concealment ratio between the information image area and the background image area becomes small, making it difficult to recognize the information that should be recognized.

Further, by changing the observation angle from the diffused light to the specularly reflected light area with respect to the illumination light source, the information displayed by the image occupying one area formed from the information image area and the background image area is not displayed. A forgery-preventing information carrier that changes from visibility to visibility, wherein both the information image area and the background image area of the information displayed by the image occupying the one area are at least one or more glittering materials. A hiding layer for hiding a substrate with a hiding ratio of 90 to 100% only by
In is formed, compared either one of the above information image area and a background image region, on said at least one kind of photoluminescent material only hiding layer by <br/>, to the at least one or more photoluminescent materials characterized in that it is formed by concealing layer to hide the visible light absorbing highly least one color material, the at least one or more of the luster material only by concealing layer in contrast ratio of 15% to 30% by The information carrier for preventing forgery.

Here, when the concealment layer for concealing the base material with the concealment rate of 90 to 100% is concealed with the concealment rate of less than 90%, the other color material having a high visible light absorption property is 1%.
The difference in brilliance between the hiding image area and the hiding ratio of 5 to 30% is reduced. That is, in the specular reflection light area, the difference in brightness between the information image area and the background image area formed by the difference in the amount of reflected light becomes small, and it becomes difficult to recognize the information that should be recognized.

On the contrary, a concealing layer to be concealed at a concealment rate of 15 to 30% using the above-mentioned color material having a high visible light absorption property,
When the concealment rate is higher than 30%, the difference in color tone from the other image area becomes extremely large. As a result, in the diffused light region, information that should not be recognized due to the difference in color tone between the information image region and the background image region is recognized.

Further, a concealing layer to be concealed at a concealment rate of 15 to 30% by using the above-mentioned color material having a high visible light absorption property,
When hiding with an extremely low hiding rate of less than 15%, the difference in glittering property between the other region and the other region becomes small. That is,
In the specular reflection light region, the difference in light and shade formed by the difference in the amount of reflected light in the information image region and the background image region becomes small, and it becomes difficult to recognize the information that should be recognized.

Further, by changing the observation angle with respect to the illumination light source from the diffused light area to the specularly reflected light area, the information displayed by the image occupying one area formed of the information image area and the background image area is An anti-counterfeiting information carrier that changes from the first visibility information to the second visibility information, the information image area and the background image area of each of the first visibility information and the second visibility information. Image areas that have been subdivided are regularly and alternately arranged in the image occupying the one area, and at least one of the information image area of the first visibility information and the background image area is the at least 1
A base material of 90 to 100% by only one or more first glittering materials.
It is formed by concealing layer to hide at 100% contrast ratio, while
However , a concealing layer for concealing the base material with a concealment rate of 70 to 85% only by the at least one or more first glittering materials.
In conjunction with the formation, both regions of the information image area and the background image region of the second visibility information, only by the at least one or more second photoluminescent material, a substrate 90-1
The second layer is formed by a hiding layer that hides at a hiding rate of 00%.
Either one, said at least one or more second photoluminescent material of the information image area and the background image region of visibility information
On the at least one or more second glittering materials, the at least one or more second glittering materials are provided with at least one or more coloring materials having higher visible light absorption than the at least one or more second glittering materials. It is an information carrier for preventing forgery, characterized in that it is formed of a concealing layer that conceals a concealing layer made of only a material at a concealment rate of 15 to 30%.

However, the first and second glitter materials used for forming the forgery prevention information carrier do not have to be glitter materials exhibiting mutually different colors, and glitter exhibiting the same colors as each other. It may be a conductive material.

Here, a concealing layer for concealing the base material with a concealment rate of 90 to 100% only by the first glittering material,
The base material is 70 to 85 with only the first glittering material.
Concealing layer to hide in% of contrast ratio, the second photoluminescent material
The body, hiding layer for hiding the substrate with 90% to 100% of the contrast ratio, on the second photoluminescent material only by concealing layer, a visible light absorbent as compared to the second luster material In the concealing layer for concealing the concealing layer of the second glittering material with the concealing ratio of 15 to 30% by the high color material, when the concealing layer is formed with the concealing ratio outside the above range, the first invention and For the same reason as in the case of the anti-counterfeit image according to the second aspect of the present invention, obtaining the target visibility information when the observation angle is either the diffuse light region or the specular light region with respect to the illumination light source. Can not be.

However, in the forgery prevention information carrier, the observation angle is a specular reflection light region with respect to the illumination light source when the light from the illumination light source reaches the forgery prevention information carrier. The angle formed by the light from the plane of the information carrier for prevention and the illumination light source and the angle formed by the reflected light reflected from the plane of the information carrier for prevention forgery are approximately the same as the observation angle of the angle region. The diffused light region having an observation angle with respect to the illumination light source means an observation angle in an angle region other than the specular reflection light region.

Further, the forgery prevention information carrier is characterized in that each of the above-mentioned concealing layers is formed by the size and density of halftone dots.

Further, the forgery prevention information carrier is characterized in that each of the above-mentioned concealing layers is formed by a line-shaped thick and thin and dense and dense.

Furthermore, the forgery prevention information carrier is characterized in that each of the above-mentioned concealing layers is formed by a wavy line-shaped thin and thin and dense.

Further, the forgery prevention information carrier is characterized in that each of the above-mentioned concealing layers is formed by a thick and thin shape of a broken line and sparse and dense.

Further, the information carrier for forgery prevention is characterized in that the glittering material or the color material forming each of the above-mentioned concealing layers is formed on a base material by a printing process.

Further, for the prevention of forgery, the printing step is formed by wet offset printing, dry offset printing, letterpress printing, waterless lithographic printing, gravure printing, flexographic printing, screen printing or intaglio printing. It is an information carrier.

Here, the anti-counterfeit information carrier is characterized in that the glittering material or color material forming each of the above-mentioned concealing layers is a printing ink.

In addition, the glittering material is a material for preventing forgery, characterized in that it is one of silver, bluish gold or reddish gold which contains aluminum powder or brass powder as a component. is there.

Further, the forgery prevention information carrier is characterized in that the color material having a higher visible light absorbing property than the glittering material is a material exhibiting an achromatic color or a chromatic color.

In particular, the forgery prevention information carrier is characterized in that the color material having a higher visible light absorbing property than the glittering material is a material exhibiting cyan, magenta, black or yellow color.

Further, each of the above information includes a logo mark, a number,
An anti-counterfeit information carrier characterized by being selected from at least one or more of a group consisting of meaningful information having authenticity of fingerprints, characters, and face images.

The forgery prevention information carrier is a banknote, passport, driver's license, stock certificate, bond, check, I
An information carrier for preventing forgery, which is a D card, a credit card, a gift certificate, a gift certificate, a right of passage, a coupon ticket, a stamp, a visa, a postcard or a book.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a result of extensive research conducted by the present applicant, the information carrier for anti-counterfeiting of the present invention is a glitter material and a color material having a higher visible light absorption than the glitter material. This is a result of the finding that the following two effects exist by changing the observation angle from the diffused light to the specularly reflected light region with respect to the illumination light source by forming the concealing layer.

The above two effects are as follows:
By using the glittering material, when two masking layers having different masking rates with respect to the substrate, that is, having two suitable masking rate sparse and dense differences are formed on the substrate, in the above diffused light region, Since the amounts of reflected light reaching the eyes of the observer from both of the two concealment layers having an appropriate concealment density difference are small with respect to each other, visually the color difference, that is, the grayscale difference resulting from the concealment density difference, is determined. It becomes possible to easily recognize. On the other hand, in the specular reflection light region, although the two hiding layers have a difference in hiding ratio,
Since the amount of reflected light reaching the eyes of the observer from both of the two concealment layers becomes extremely large, it is difficult to visually recognize the color difference, that is, the difference in shade, which is caused by the density difference of the concealment ratio.

Further, as a second effect, a hiding layer having a very high hiding rate with respect to a substrate formed of a glittering material, and a visible light absorbing layer on the hiding layer having a higher visible light absorbing property than that of the glittering material. In the two concealment layers, which are formed by using a high color material and have a concealment layer having a very low concealment ratio, the amounts of reflected light reaching the eyes of the observer become smaller in the diffused light region. Therefore, it is difficult to visually recognize the difference in color tone and glitter from the two concealing layers, even though the constituent components are different, and as a result, the same degree of stimulus is observed by human eyes. On the other hand, in the specular reflection light region, the amount of reflected light reaching the eyes of the observer from the hiding layer made of only the glittering material becomes extremely large, whereas the hiding by overlaying the color material having high visible light absorbing property. Since the amount of reflected light reaching the eyes of the observer from the layer is relatively small, it is possible to easily visually recognize the difference in light and shade, that is, the difference in color tone, which is caused by the difference in the amount of reflected light, in the two masking layers. Is.

The forgery prevention information carrier according to the present invention can be roughly classified into three forms by appropriately applying the above two effects. As the forgery prevention information carrier showing the first effect, the visibility information is changed to non-visibility information by changing the angle of the viewpoint for observing the forgery prevention information carrier from the diffuse light region to the specular light region. It is possible to obtain an anti-counterfeiting information carrier having the effect of changing to.

The anti-counterfeiting information carrier exhibiting the first effect is composed of two image areas in which the density difference of the hiding ratio is formed on the base material by using the glittering material, and the diffuse light area is formed. In this case, since the amount of reflected light reaching the eyes of the observer becomes relatively small, an image in which the density difference of the hiding ratio of the hiding layer with respect to the base material in the above two image regions is appropriately formed is a color tone difference, that is, a grayscale difference. The difference can be visually recognized, and the information composed of the two image areas can be easily recognized. On the other hand, in the specular reflection light region,
Since the amount of reflected light reaching the eyes of the observer from both of the two image regions becomes extremely large, the specularly reflected light is predominantly recognized, and the concealment difference of the concealment ratio of the concealment layer with respect to the substrate results. It becomes difficult to visually recognize the difference in color tone, that is, the difference in shade, and it becomes difficult to recognize the information composed of the two image regions.

As the anti-counterfeit information carrier having the second effect, the angle of the viewpoint for observing the anti-counterfeit information carrier is changed from the diffused light region to the specular reflected light region, so that the non-visibility information can be obtained. It is possible to obtain an anti-counterfeit information carrier that exhibits the effect of changing into visibility information.

The information carrier for anti-counterfeiting which exhibits the above-mentioned second effect is the image area in which the glittering material is formed on the base material with an extremely dense hiding ratio, and further, the glittering material is formed on at least a part of the upper layer thereof. It is composed of two image areas of an image area in which a color material having higher absorbability of visible light is formed with an extremely sparse concealment ratio. In the diffused light area, the amount of reflected light reaching the eyes of the observer is relatively large. Since it becomes smaller, it becomes difficult to visually recognize the difference in brightness and the difference in color tone due to the difference in the amount of reflected light between the two image areas, and it is easy to recognize the information formed by the two image areas. Becomes difficult to do. On the other hand, in the specular reflection light region, the amount of reflected light reaching the eyes of the observer from the image region composed of only the glitter material becomes extremely large, while the glitter material and the visible light absorbing property Since the amount of reflected light reaching the eyes of the observer from the image region composed of a high-color material is relatively small, the difference in light and darkness due to the difference in the amount of reflected light, that is, the color tone difference is visually recognized in the two image regions. This makes it possible to easily recognize the information composed of the two image areas.

As the forgery prevention information carrier having the third effect, the first visibility is obtained by changing the angle of the viewpoint for observing the forgery prevention information carrier from the diffuse light region to the specular light region. It is possible to obtain a forgery prevention information carrier that has the effect of changing information to another second visibility information.

The information carrier for anti-counterfeiting which exhibits the above-mentioned third effect has a visible light absorbing property as compared with the first glitter material and the second glitter material, and further the second glitter material. Is formed by forming a high color material on the base material, and a total of four image areas for obtaining an anti-counterfeit information carrier showing the first and second effects described above are formed on the base material. The information carrier for prevention of forgery, in which the images obtained by subdividing all four image areas are regularly arranged alternately in one area. Among the above four image areas, two image areas in which the difference in density of the hiding ratio with respect to the substrate is appropriately formed by using the first glittering material are the anti-counterfeit which exhibits the first effect. Similar to the principle of the information carrier for information, in the above diffused light region, the amount of reflected light reaching the eyes of the observer is relatively small, so that it is possible to visually recognize a color tone difference, that is, a shade difference. It is possible to easily recognize the first visibility information composed of the image area. On the other hand, in the specular reflection light region, the amount of reflected light reaching the eyes of the observer from both of the two image regions becomes extremely large.
It becomes impossible to visually recognize a color tone difference, that is, a shade difference, which is caused by a density difference of the hiding ratio of the hiding layer with respect to the substrate.
It becomes difficult to recognize the first visibility information composed of one image area.

Further, in all of the four image areas, the second glitter material is formed on the base material only with the second glitter material with an extremely high concealment ratio, and the second glitter material is used as the upper layer in the image area. Similar to the principle of the anti-counterfeit image showing the second effect, in the two image areas of the image area formed with a color material having a high visible light absorption with an extremely rough hiding ratio, the diffused light area is used. In this case, since the amount of reflected light reaching the eyes of the observer is relatively small, the second glitter material is formed alone, and the second glitter material and the color material having high visible light absorption are used. It becomes difficult to visually recognize a difference in brightness, that is, a color tone difference between the two image areas, and it becomes difficult to easily recognize the second visibility information configured by the two image areas. On the other hand, in the specular reflection light region, the amount of reflected light reaching the eyes of the observer from the image region composed of only the second glitter material is extremely large, whereas the second glitter material is Also, since the amount of reflected light reaching the eyes of the observer from the image region composed of the color material having a high visible light absorption is relatively small, the difference in brightness between the two image regions is caused by the difference in the amount of reflected light. That is, the difference in color tone can be visually recognized, and the second visibility information composed of the two image areas can be easily recognized.

That is, in the diffused light region, the first
Using the glittering material, the first visibility information, which is visually recognized by the density difference between the two image areas that are appropriately formed with respect to the density difference of the hiding ratio with respect to the substrate, is dominantly recognized, and conversely, In the specular reflection light region, an image region in which only the second glitter material is formed on the substrate with an extremely dense hiding rate and a color material having higher visible light absorption than the second glitter material in the upper layer thereof. Is used to predominantly recognize the second visibility information recognized by the difference in brightness between the two image areas of the image area formed with an extremely rough hiding ratio.

Therefore, in the information carrier for preventing forgery of the present invention obtained by such a structure, if the material is inexpensive and the general method is simple and inexpensive, it is possible to select the type of the glittering material and the color material. There is no limitation on the type, the method of applying to the base material, the color of the base material, etc., and the angle of the viewpoint for observing the forgery prevention information carrier, that is, the forgery prevention image is specularly reflected from the diffused light region. The effect of changing visibility information to non-visibility information by changing to the light area,
The non-visibility information shows the effect of changing to the visibility information, or the effect of changing the first visibility information to the second visibility information, and a general person has obtained the forgery prevention information carrier. Only by doing so, it is possible to obtain a highly sophisticated anti-counterfeit information carrier having an optical effect capable of easily discriminating the authenticity without requiring a special method.

As a matter of course, since the forgery prevention information carrier uses a glittering material, even if a copy is made using a recent high-performance color copying machine, it is the same as the original. It is impossible to faithfully reproduce the excellent luster.

[0059]

The present invention will be described in more detail with reference to the following examples. (Embodiment 1) FIG. 1 shows a forgery prevention information carrier (1) according to a first embodiment of the present invention. The forgery prevention information carrier is obtained by changing the angle of the viewpoint for observing the forgery prevention information carrier from a diffuse light region to a specular light region on a part of the white paper (2) as a base material. The forgery prevention image (3) in which the visibility information is changed to the non-visibility information is applied by wet offset printing. here,
The ink used to form the forgery prevention image (3) is only New Champion Gold (red mouth) ink manufactured by Dainippon Ink and Chemicals, Inc.

FIG. 2 is an observation diagram depending on the angle of the viewpoint for observing the forgery prevention image (3). In the forgery prevention image (3), the visibility character information of P is changed to a non-visibility information by changing the angle of the observing viewpoint from the diffused light area to the specularly reflected light area. here,
The character information image area (4) of P is solid printed by wet offset printing using New Champion Gold (red mouth) ink manufactured by Dainippon Ink and Chemicals, Inc. In addition, the P character information image area (4)
In the background image area (5) around (1), the New Champion Gold (red mouth) ink also manufactured by Dainippon Ink and Chemicals, Inc. was used for wet offset printing to print with a dot area ratio of 80%.

FIG. 3 shows the forgery prevention information carrier (1).
The three positional relationships of the illumination light source (6), the viewpoint (7), and the forgery prevention information carrier (1) when viewed in the diffused light area and the specularly reflected light area as referred to in the present invention are shown. Is. When the illumination light source (6), the viewpoint (7), and the forgery prevention information carrier (1) are in the positional relationship (a), the observation is made in the diffused light region, and the illumination light source (6) and the viewpoint (7). ) And the forgery prevention information carrier (1) are in the positional relationship (b), it means that the observation is made in the specular reflection light region.

That is, when the forgery prevention information carrier (1) in this embodiment is observed in the positional relationship (a) meaning the diffused light region, the character information P is observed, but the forgery prevention is performed. When the information carrier (1) is observed in the positional relationship (b) meaning the specular reflection light region, the character information P is latent imaged and cannot be observed.

This is the P character information image area (4) in the positional relationship (a) meaning the diffused light area and the positional relationship (b) meaning the regular reflection light area shown in FIG. 4 and the surrounding background. It can be explained from the graphs (8) and (9) showing the respective color differences ΔE from the image area (5).

Here, the character information image area (4) of P in the positional relationship (a) meaning the diffused light area and the positional relationship (b) meaning the regular reflection light area in FIG. 4 and the surrounding background image. The respective color difference ΔE from the area (5) was measured using a goniospectrophotometer GSP-1 type [Murakami Color Co., Ltd.]. However, the positional relationship (a) that means the above diffused light region
In order to reproduce the above on the device, the incident light of the light source with respect to the measurement sample is fixed at 45 °, and the light receiving angle is changed from -10 ° to 1
The measurement was performed by changing it to 0 °. Further, in order to reproduce the positional relationship (b) meaning the regular reflection light region on the device,
Fix the incident light of the light source on the measurement sample at 45 °,
The measurement was performed while changing the light receiving angle from 35 ° to 55 °.
The standard white plate 3018A was used to calibrate the apparatus, and the incident light angle was 45 ° and the light receiving angle was 0 °, that is, the standard white plate was calibrated with a perfect diffusion surface.

That is, in the positional relationship (a) meaning the diffused light area, a graph (8) showing the color difference ΔE between the character information image area (4) and the surrounding background image area (5).
The color difference ΔE is about 9 which is a relatively large value, and the character information image area (4) and the surrounding background image area (5) are clearly visually differentiated. As a result, clear character information "P" is recognized in the forgery prevention image (3).

On the other hand, in the positional relationship (b) meaning the specular reflection light region, the color difference ΔE between the character information image region (4), the surrounding background image region (5) and the graph (9) showing the color difference ΔE. Indicates a value of about 5, which is a relatively small value, and the character information image area (4) and the surrounding background image area (5) are difficult to visually distinguish, and as a result,
Information becomes difficult to recognize in the forgery prevention image (3).

As a matter of course, the copy of the anti-counterfeiting information carrier (1) with a color copying machine is completely different from the original anti-counterfeiting information carrier (1) in terms of luster and observation angle. The information carrier for prevention of forgery (1) did not show the change of the above-mentioned character information image, and was excellent in the effect of preventing forgery due to color copying.

(Embodiment 2) FIG. 5 shows a forgery prevention information carrier (10) according to a second embodiment. The forgery prevention information carrier (10) is a part of the white paper (2) as a base material, and the angle of the viewpoint for observing the forgery prevention information carrier (10) is specularly reflected light from the diffused light region. A forgery prevention image (11) in which the non-visibility information is changed to the visibility information by changing the area is applied by wet offset printing. Here, the inks used for forming the forgery prevention image (11) are New Champion Gold (blue mouth) ink and Trans G (indigo) ink manufactured by Dainippon Ink and Chemicals, Inc.

FIG. 6 shows the forgery prevention information carrier (1
It is an observation view depending on the angle of the viewpoint which observes 0). The forgery prevention information carrier (10) changes the angle of the observing viewpoint from the diffused light region to the specularly reflected light region, so that the non-visibility information is manifested and changed to the Q visibility character information. Here, the character information image area (12) of Q and the surrounding background image area (13) are solid-printed by wet offset printing using New Champion Gold (blue mouth) ink manufactured by Dainippon Ink and Chemicals, Inc. And the Q character information image area (1
In the background image area (13) around 2), the trans G (indigo) ink mesh manufactured by Dainippon Ink and Chemicals, Inc. is applied by wet offset printing on the solid printing of the above New Champion Gold (blue mouth) ink. Point area rate 25%
Is printed.

Here, the forgery prevention information carrier (1
The three positional relationships among the illumination light source (6), the viewpoint (7), and the forgery prevention information carrier (10) when observing (0) are the same as in FIG. When the illumination light source and the viewpoint are in the positional relationship (a) meaning the diffused light area, no information is observed on the forgery prevention information carrier (10), but the illumination light source and the viewpoint are the specular reflection light. When there is a positional relationship (b) meaning a region, character information called Q is observed.

This is the Q character information image area (12) in the positional relationship (a) meaning the diffused light area and the positional relationship (b) meaning the specular reflection light area shown in FIG.
Difference ΔE between the background image area (13) and the surrounding background image area (13)
It can be explained from graphs (14) and (15) showing the above.

Here, the character information image area (12) of Q in the positional relationship (a) meaning the diffused light area and the positional relationship (b) meaning the specular reflected light area in FIG. 7 and the surrounding background. Color difference ΔE from the image area (13)
Was measured in the same manner as in the first embodiment.

That is, in the positional relationship (a) which means the diffused light area, the color difference ΔE of the graph (14) showing the color difference ΔE between the character information image area (12) and the surrounding background image area (13). The value is around 4, which is a relatively small value, and it is difficult to visually distinguish the information image area (12) and the surrounding background image area (13), and as a result, the forgery prevention is performed. Information is difficult to recognize in the business image (11).

On the other hand, in the positional relationship (b) meaning the regular reflection light region, the color difference ΔE of the graph (15) showing the color difference ΔE between the character information image region (12) and the surrounding background image region (13). Shows a value of about 8 and is a relatively large value, which clearly differentiates visually, and as a result, the forgery prevention image (1
In 1), clear character information of Q comes to be recognized.

As a matter of course, the product obtained by copying the forgery prevention information carrier (10) in the second embodiment with a color copying machine is completely different from the original forgery prevention information carrier (10) in visual sense. There was no change in the information image depending on the luster and the observation angle, and the forgery prevention information carrier (10) in the second example was also excellent in the forgery prevention effect by color copying.

(Third Embodiment) FIG. 8 shows a forgery prevention information carrier (16) according to a third embodiment. The forgery prevention information carrier (16) is a part of the white paper (2) as a base material, and the angle of the viewpoint for observing the forgery prevention information carrier (16) is specularly reflected light from the diffused light region. A forgery prevention image (17) in which the first visibility information is changed to the second visibility information by changing the area is applied by wet offset printing. Here, the ink used for forming the forgery prevention image (17) is New Champion Gold (red mouth) ink, New Champion Gold (blue mouth) manufactured by Dainippon Ink and Chemicals, Inc.
Ink and trans G (indigo) ink.

FIG. 9 shows the forgery prevention information carrier (1
It is an observation view depending on the angle of the viewpoint which observes 6). The forgery prevention information carrier (16) changes the angle of the observing viewpoint from the diffuse light region to the specular light region, so that the first visibility character information called P is the second visibility called Q. Change to text information.

The anti-counterfeit image (17) is formed by alternately arranging the first lines having an image width of 0.5 mm and the second lines having an image width of 0.5 mm. The first parallel line is composed of the P character information image area (18) which is the first visibility information and the background image area (19) thereof, and the second parallel line is the second visibility information. Q character information image area (20) and its background image area (2
It is composed of 1). That is, by alternately arranging the first parallel lines and the second parallel lines, the first visibility information and the second visibility information are respectively included in the forgery prevention image (17). The information image area and the background image area thereof are regularly arranged, and two different first visibility information and second different information are included in the forgery prevention image (17). Visibility information can be formed.

The P character information image area (18) in the forgery prevention image (17) is a New Champion Gold (red mouth) made by Dainippon Ink and Chemicals, Inc.
Solid printing was performed by wet offset printing using the ink. In addition, the background image area of P (1
In 9), a New Champion Gold (red mouth) ink manufactured by Dainippon Ink and Chemicals, Inc. is used to perform printing with a dot area ratio of 80% by wet offset printing. Further, a Q character information image area (20) and a background image area (21) in the forgery prevention image (17).
Is solid-printed by wet offset printing using New Champion Gold (blue mouth) ink manufactured by Dainippon Ink and Chemicals, Inc.
In the background image area (21) of the above, by the wet offset printing on the solid printing of the New Champion Gold (blue mouth), the trans G (indigo) ink made by Dainippon Ink and Chemicals Co., Ltd. has a halftone dot area ratio of 25%. It is printed.

Here, the forgery prevention information carrier (1
The three positional relationships of the illumination light source (6), the viewpoint (7), and the forgery prevention information carrier (17) when observing 7) are the same as in FIG. When the illumination light source and the viewpoint are in the positional relationship (a) meaning the diffused light area, the first visibility information called P is observed in the forgery prevention image (17), When the viewpoint is in the positional relationship (b) meaning the specular reflection light region, the second visibility information called Q is observed.

This is because the P character information image area (1) in the positional relationship (a) meaning the diffused light area and the positional relationship (b) meaning the specular reflected light area shown in FIG.
8) and the P background image area (19), the Q character information image area (20), and the Q background image area (21) showing the respective color differences ΔE from the graphs (22) and (23). You can

Here, the P character information image area (18) in the positional relationship (a) meaning the diffused light area and the positional relationship (b) meaning the specular reflection light area in FIG.
The color difference ΔE between the P and P background image areas (19) and between the Q character information image area (20) and the Q background image area (21) was measured in the same manner as in the first embodiment.

That is, in the positional relationship (a) meaning the diffused light area, the P character information image area (18) and the P background image area (19) in the graph (22) are shown.
The value of the color difference ΔE of the polygonal line (24) indicating the color difference ΔE of about 9 is about 9, which is a relatively large value, and compared with the character information image area (20) of Q and its Q. The value of the color difference ΔE of the polygonal line (25) indicating the color difference ΔE with the background image area (21) is about 4 and is a relatively small value, and the positional relationship (a) means the diffused light area. In the above, the result is that the first information image called P formed from the P character information image area (18) and the P background image area (19) is dominantly recognized, and the Q character information is relatively obtained. Image area (20) and its Q background image area (21)
It becomes difficult to visually observe the second information image called Q formed from the.

However, in the positional relationship (b) meaning the specular reflection light region, the P character information image region (18) and the P background image region (19) in the graph (23) are shown.
The value of the color difference ΔE of the polygonal line (26) indicating the color difference ΔE of about 5 is about 5, which is a relatively small value, and compared with the character information image area (20) of Q and its Q. The value of the color difference ΔE of the polygonal line (27) indicating the color difference ΔE with the background image area (21) is about 8 and is a relatively large value, which means the positional relationship (b) that means the specular reflection light area. ), The first information image called P formed from the P character information image area (18) and the P background image area (19) becomes difficult to visually observe, and the character of Q is relatively displayed. As a result, the second information image called Q formed from the information image area (20) and the Q background image area (21) is dominantly recognized.

Therefore, finally, when the illumination light source and the viewpoint are in the positional relationship (a) which means the diffused light region, the first character P on the forgery prevention information carrier (17).
However, when the illumination light source and the viewpoint are in the positional relationship (b) meaning the specular reflection light region, the second visibility information called the letter Q is observed. Can be shown.

As a matter of course, the copy obtained by copying the forgery preventing image in the third embodiment by the color copying machine is completely different from the original in visual sense, and shows no change in the information image depending on the glitter and the observation angle. The anti-counterfeit image was also excellent in the effect of preventing forgery due to color copying.

[0087]

[Effects of the Invention] That is, according to the present invention, meaningful information is displayed by using a glitter material and a color material having a higher visible light absorption than the glitter material without requiring complicated and many manufacturing steps. By arranging each image to be regularly arranged, not only the color difference between the printed matter and the color copy is remarkable, but also the general public just picked up the printed matter and required a special method. As a result, it is possible to obtain a sophisticated forgery prevention information carrier having an optical effect capable of easily discriminating the authenticity.

The anti-counterfeit image on the anti-counterfeit information carrier is obtained by simply obtaining a special glittering material such as interference mica, oxidized flake mica, pigment-coated aluminum flake, or optically modified flake to obtain ink and paint. Unlike the technology that only utilizes the optical characteristics of the glittering material itself to change the color depending on the viewing angle, the color dependence of the genuine anti-counterfeit information carrier can be easily reproduced. Impossible, using common and relatively inexpensive materials and simple printing methods,
It is possible to show an optical effect in which arbitrary information recognized by the human eye at a specific observation angle changes to completely different arbitrary information by changing the observation angle.

Furthermore, since the information carrier for preventing forgery can be formed by a printing method, unlike the method of forming a security element such as a hologram on a substrate,
There is no need to use an indirect special adhesive or the like to attach it to the base material, and an additional process becomes unnecessary. Further, the mechanical strength in the distribution process is excellent as compared with the formation on the substrate by sticking.

That is, the anti-counterfeit information carrier according to the present invention uses a general glittering material and an ordinary printing method to directly apply the anti-counterfeit image having a hologram effect to the substrate. Authenticity using advanced anti-counterfeiting technology that can be granted, has excellent cost performance and mechanical distribution strength, and can be visually checked at the general distribution stage without relying on a skilled appraiser or a special appraisal device. It becomes an information carrier for discrimination and forgery prevention.

[Brief description of drawings]

FIG. 1 shows a forgery prevention information carrier according to a first embodiment of the present invention.

FIG. 2 is an observation view depending on a viewpoint angle for observing the forgery prevention image according to the first embodiment.

FIG. 3 shows three positional relationships among an illumination light source, a viewpoint, and a forgery prevention information carrier when observing the forgery prevention information carrier.

FIG. 4 is a graph showing respective color differences ΔE between an information image area and a background image area in a diffused light area and a specularly reflected light area in the first example.

FIG. 5 shows a forgery prevention information carrier according to a second embodiment of the present invention.

FIG. 6 shows an observation view depending on a viewpoint angle for observing the forgery prevention image in the second embodiment.

FIG. 7 is a graph showing respective color differences ΔE between the information image area and the background image area in the diffused light area and the specularly reflected light area in the second example.

FIG. 8 shows a forgery prevention information carrier according to a third embodiment of the present invention.

FIG. 9 shows an observation view depending on a viewpoint angle for observing the forgery prevention image in the third embodiment.

FIG. 10 shows respective color differences ΔE between the first information image area and its background image area and the second information image area and its background image area in the diffused light area and the regular reflection light area in the third embodiment. The graph that shows.

[Explanation of symbols]

1 Forgery prevention information carrier 2 of the first embodiment White paper 3 Forgery prevention image on forgery prevention information carrier of the first embodiment 4 On forgery prevention information carrier of the first embodiment Information image area 5 of anti-counterfeit image 5 Background image area 6 of anti-counterfeit image on anti-counterfeit information carrier of the first embodiment Illumination light source 7 Observation viewpoint 8 Information image area and background image area in diffused light area Color difference ΔE 9 Color difference ΔE 10 between the information image area and the background image area in the specular reflection light area ΔE 10 Counterfeit prevention information carrier 11 of the second embodiment Counterfeit prevention on the counterfeit prevention information carrier of the second embodiment Image 12 Information image area 13 of the forgery prevention image on the forgery prevention information carrier of the second embodiment 13 Background image area 14 of the forgery prevention image on the forgery prevention information carrier of the second embodiment Light territory Color difference ΔE 15 between the information image area and the background image area in ΔE 16 color difference ΔE 16 between the information image area and the background image area in the specular reflection light area. Forgery prevention information carrier 17 of the third embodiment Forgery of the third embodiment Anti-counterfeit image 18 on the prevention information carrier Information image region 19 of the first information image in the anti-counterfeit image of the third embodiment 19 of the first information image in the anti-counterfeit image of the third embodiment Background image region 20 Information image region 21 of the second information image in the forgery prevention image of the third embodiment Background image region 22 of the second information image in the forgery prevention image of the third embodiment Color difference ΔE 23 between the information image area and the background image area in the first and second visibility information, and the color difference Δ between the information image area and the background image area in the first and second visibility information in the specular reflection light area 24 Color difference ΔE between the information image area and the background image area in the first visibility information 25 Color difference ΔE 26 between the information image area and the background image area in the second visibility information and the information image area in the first visibility information Color difference from background image area ΔE 27 Color difference from information image area and background image area in second visibility information ΔE a Counterfeit prevention information carrier, positional relationship between illumination light source and observation viewpoint b Counterfeit prevention information carrier, Positional relationship between illumination light source and observation viewpoint

Continuation of the front page (56) Reference JP 2000-37941 (JP, A) JP 8-324169 (JP, A) JP 3-266684 (JP, A) JP 7-68981 (JP, A) JP-A-9-267592 (JP, A) JP-A-8-290646 (JP, A) JP-A-11-245501 (JP, A) JP-A-57-20395 (JP, A) JP-A-60 -79991 (JP, A) JP-A-60-87380 (JP, A) Fukukaihei 5-76765 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41M 3/14 B41M 3/00 B42D 15/10 531

Claims (15)

(57) [Claims] 1. The information displayed by an image occupying one area formed from an information image area and a background image area is visually recognized by changing an observation angle from a diffused light to a specularly reflected light area with respect to an illumination light source. In the information carrier for preventing forgery, which changes from visibility to non-visibility, one of the information image area and the background image area of the information displayed by the image occupying the above-mentioned one area is at least one or more glitters. <br/> only material thus formed by concealing layer to hide the substrate with 90% to 100% of the contrast ratio and the other only by the at least one or more of the luster material, the base material 70 to 85% An information carrier for preventing forgery, which is formed of a concealing layer that conceals at a concealment ratio of 1. 2. The information displayed by the image occupying one area formed of the information image area and the background image area is changed by changing the observation angle from the diffused light to the specularly reflected light area with respect to the illumination light source. A forgery-preventing information carrier that changes from visibility to visibility, wherein both the information image area and the background image area of the information displayed by the image occupying the one area are at least one or more glittering materials. only Te by <br/> to being <br/> formed by concealing layer to hide the substrate with 90% to 100% of the contrast ratio, one of the information image area and a background image region, the at least one On the concealing layer made of only the above glittering material, at least one kind of the coloring material having at least one kind of coloring material having a higher visible light absorbing property than the at least one kind of glittering material is used. More glittering materials
An information carrier for anti-counterfeiting, which is formed of a hiding layer for hiding the hiding layer only by 15% at a hiding rate of 15 to 30%. 3. The information displayed by the image occupying one area formed from the information image area and the background image area is changed by changing the observation angle from the diffused light to the specularly reflected light area with respect to the illumination light source. An anti-counterfeiting information carrier that changes from the first visibility information to the second visibility information, the information image area and the background image area of each of the first visibility information and the second visibility information. The image is configured by regularly arranging the subdivided images in the image occupying the one area, and at least one of the information image area of the first visibility information and the background image area is only by the at least one or more first photoluminescent material is formed of a hiding layer for hiding the substrate with 90% to 100% of the contrast ratio,
The other, of said at least one or more of the first luster material
The body, while being formed with a concealing layer to hide the substrate with contrast ratio 70 to 85% both regions of the information image area and the background image region of the second visibility information, the at least one more The base material is made of 90% only by the second glitter material.
It is formed by concealing layer to hide at 100% contrast ratio, one of the information image area and the background image region of the second visibility information, depending only on the at least one or more second luster material on the masking layer, by the high visible light absorbent as compared to at least one or more second photoluminescent material at least one kind of color material, only the at least one or more second luster material The hiding layer by 15 to 30
An anti-counterfeit information carrier, which is formed of a hiding layer that hides at a hiding ratio of%. 4. The concealing layer is formed by the size and density of halftone dots.
The information carrier for prevention of forgery according to 2 or 3. 5. The hiding layer is formed by a line-shaped thick and thin pattern and a dense / dense pattern.
The information carrier for prevention of forgery according to 2 or 3. 6. The masking layer according to claim 1, wherein each of the masking layers is formed by a wavy line-shaped thin and fine pattern.
The information carrier for prevention of forgery according to 2 or 3. 7. The concealing layer is formed by a thick and thin line having a broken line shape and a dense / dense pattern.
The information carrier for prevention of forgery according to 2 or 3. 8. The forgery prevention information carrier according to claim 1, wherein the glittering material or the color material forming each of the concealing layers is formed on a base material by a printing process. . 9. The printing step comprises wet offset printing, dry offset printing, letterpress printing, waterless lithographic printing,
The forgery prevention information carrier according to claim 8, which is formed by a gravure printing, a flexo printing, a screen printing or an intaglio printing process. 10. The forgery prevention information carrier according to claim 1, wherein the glittering material or the color material forming each of the concealing layers is a printing ink. 11. The glittering material is any material containing aluminum powder or brass powder and exhibiting silver color, bluish gold color or reddish gold color. Forgery prevention information carrier. 12. The anti-counterfeit information carrier according to claim 2, wherein the color material having a higher visible light absorbing property than the glitter material is a material exhibiting an achromatic color or a chromatic color. body. 13. The color material having higher visible light absorption than the glitter material is a material exhibiting cyan, magenta, black or yellow color.
The information carrier for prevention of forgery described. 14. The information is selected from at least one kind selected from the group consisting of logo mark, number, fingerprint, character and meaningful information having authenticity of a face image. The information carrier for preventing forgery according to item 2 or 3. 15. The anti-counterfeit information carrier is a banknote, passport, driver's license, stock certificate, bond, check, I
A D card, a credit card, a gift certificate, a gift certificate, a right of passage, a coupon ticket, a stamp, a visa, a postcard or a book, and the claim 1, 2, 3, 4, 5, 6, 7, 8, 9,
The information carrier for preventing forgery according to 10, 11, 12, 13 or 14.