JP3449688B2 - Authenticated printed matter and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of security printed matter that requires new design and anti-counterfeiting effect, that is, banknotes, passports, securities, identification cards, cards, pass tickets, valuable printed materials and important documents. In the above, the present invention relates to a colored metallic ink that is preferably used, and a printed matter that is formed from these and that has anti-counterfeiting and genuine / counterfeit discrimination effects.

[0002]

2. Description of the Related Art Recently, with the diversification of consumers' values in automobile painting and coating, there has been an increasing demand for external appearance painting having new beauty, fashionability and high quality. Further, there is a demand for a printing technique having a new design property and a high anti-counterfeit effect for printed matter such as important documents requiring security. For this reason, in recent years, special bright materials such as interference mica, oxidized flake mica, and pigment-coated aluminum flakes have been added to inks and paints to produce printed matter with excellent color flip-flop properties that cause color changes depending on the observation angle. And coating film.

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 colors is called a flip-flop property, and the property of changing a hue is called a color flip-flop property.

As a technique utilizing the special glittering material exhibiting such properties, for example, a mixture of conventional scale-like metallic pigments, a scale-like metallic pigment whose surface is coated with a colored pigment (JP-A-2- No. 142862), a metallic paint using interference mica whose surface is coated with titanium oxide, a colored mica coated with iron oxide or an organic pigment on the surface, a paint using a combination of scale-like colored aluminum pigment and mica 7071
No. 9) is proposed.

Further, in JP-A-4-202477, by incorporating mica-like aluminum solid solution red iron oxide,
A resin composition capable of forming a coating film having excellent flip-flop properties is described. Further, JP-A-7-292994 discloses that a combination of a plurality of scale-like colored pigments having different color tones, or a combination of scale-like colored metal pigments and organic pigments having different colors from each other, is used in a color flip-flop. A color flip-flop metallic paint capable of forming a coating film having excellent properties is described.

Further, with the development of color copying machines in recent years, it has become possible to make delicate 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 a skilled appraiser or a special appraisal device for authenticity discrimination of all securities and the like, and it is desired that ordinary people can easily and instantly make a judgment. As a method of authenticating such securities and the like, recently, many have been utilizing the angle dependence of color by blending the special glittering material or the like with the ink. A color copy-preventing printed matter using an ink using a conventional glittering material or the like that utilizes the angle dependence of color is easily forged.

[0007] However, in the printed matter using the ink containing such a special glittering material, the glittering material itself is expensive, which increases the cost of the printed matter. In addition, such a printed matter utilizes only the angle-dependent property of color due to its glittering property, and it is easy to obtain a similar or similar glittering material and knead it with ink or paint. Will be forged by.

For these reasons, not only the difference in color tone between the printed matter and its color copy is remarkable, but also by simply obtaining the special glittering material and blending it in ink and paint, etc. It has been desired to develop a printing technology that cannot easily reproduce the color angle dependence of the printed matter.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and at least a part of the visibility image can be obtained by changing the observation angle of an arbitrary visibility image. It provides a printed matter that reveals and erases. That is, the difference in color tone between the actual printed matter and the color copy thereof is remarkable, and the same angular dependence effect as that of the genuine article cannot be reproduced simply by obtaining a glittering material of the same kind or the same, and the production thereof. The purpose of the present invention is to provide a method, and the printed matter can be judged at a glance whether or not there is an image depending on the observation angle, and can be instantly judged as authentic by a special apparatus and a skilled appraiser.

[0010]

According to the present invention, two or more visibility images having an arbitrary gradation and a background image are arranged on a base material, and an observation angle of a specular reflection light region with respect to an illumination light source. The at least one visibility image among the visibility images having the arbitrary gradation is characterized in that at least one visibility image among the visibility images becomes unrecognizable. , Metal of at least one color
Consist of a gloss ink and an ink having a small dependence on the viewing angle of color, and the remaining visibility image and the background image are at least one or more metallic gloss inks .
Configured, it consists of a color different from the two or more visibility and background images having the arbitrary gradation, the illumination
When observed in the specular light region with respect to the light source,
Visibility image composed of only one or more metallic gloss inks
The image and the background image have a large amount of reflected light and
It is a genuine / counterfeit discrimination printed material characterized in that the difference becomes unrecognizable .

Further, the true / false discrimination printed matter is characterized in that the ink whose color has a small viewing angle dependency is particularly black or black.

Further, the metallic luster ink is a metallic luster <br/> ink including at least any of the first colored powder and metallic luster powder, said first colored powder and metallic luster powder The true / false discrimination printed material is characterized in that the component ratio of is in the range of 99: 1 to 1:99 by weight ratio.

Further, the metallic luster inks, metal containing at least any of the first colored powder and said first colored powder relatively more particle size smaller second colored powder and metal gloss powder A glossy ink, wherein the weight ratio of the first colored powder and the second colored powder is 99: 1 to 1:99, and the first colored powder and the first colored powder are The true / false discrimination printed matter is characterized in that the ratio of the colored powder component, which is the sum of the second colored powder, and the component of the metallic luster powder is in the range of 99: 1 to 1:99 by weight.

The color of the second colored powder is in a complementary color relationship with the color of the first colored powder.

Further, an image composed of two or more visibility images having an arbitrary gradation and a background image is color-separated with an arbitrary screen ruling by a color scanner,
Cyan (C) version, Magenta (M) version, Yellow (Y) version
A plate and a black (B) plate are prepared, and a black (B) is formed from at least one visibility image and a background image of the prepared black (B) plate surface having the arbitrary gradation. Black plate without components (B ')
Is produced, and the glitter ink is printed on the cyan (C) plate, the magenta (M) plate, and the yellow (Y) plate, and the observation angle dependency is small for the black (B ') plate. A method for producing a genuine / counterfeit printed matter, which is characterized by being formed by printing ink.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In the authenticity / falsification printed matter of the present invention, at least a part of a printing part is printed with one or more colors of metallic gloss ink, and at least a part of the printing part is angle-dependent in color. Since it is printed with an ink that has low properties, the visibility image of at least a part of the printed area is erased at any observation angle to form a non-visibility image by changing the observation angle, and the observation angle can be changed. This makes it visible again and can be made visible.

Color prints having general gradation and reproducing a wide range of colors are cyan (C), magenta (M),
Printing using four color inks in which black (B) is added to the three primary color components of yellow (Y), that is,
Colors are reproduced based on the principle of subtractive color mixing.

The present invention uses cyan (C), magenta (M), and yellow (Y), which are color components of general color prints.
By adding metallic luster powder to the ink containing the first colored powder corresponding to each color component such as ink, the amount of light reflected from the illumination light source to the printed matter increases at any observation angle, Cyan (C), which is a color component,
The amount of light emitted from magenta (M), yellow (Y), etc. is relatively attenuated, making it difficult for the human eye to recognize, while black (B) ink has no color and its angle dependence of color is extremely small. Therefore, the fact that it is recognized by the human eye to the same degree at any observation angle is used.

In addition, an ink containing a first colored powder corresponding to each color component of cyan (C), magenta (M), and yellow (Y), which are color components of a general color print, is added to an ink and a metallic luster powder. In addition, as a second colored powder, red (R), green (G), which form a complementary color relationship with each color component of cyan (C), magenta (M), and yellow (Y),
By adding a fine particle pigment having excellent transparency corresponding to blue (B), the amount of light reflected from the light source is increased at any viewing angle, and red (R) and green (G) are added as complementary color components. , The color of the fine particle pigment of blue (B) and the synthesized intermediate color of the metallic luster color are predominantly observed, and the original color components of each ink are cyan (C), magenta (M), The amount of light from yellow (Y) and the like is relatively attenuated, making it difficult for the human eye to recognize. On the other hand, black (B) ink has no color and the angle dependence of the color is extremely small. Also utilizes the fact that it is recognized by the human eye to the same extent.

That is, the authenticity / fake discriminating printed material of the present invention has the above-mentioned first colored powder corresponding to cyan (C), magenta (M), and yellow (Y) used in known color inks and a light source. On the other hand, when observed in the regular reflection area, one or more colors of gold made of metallic luster powder that increases the amount of reflected light.
It is a printed matter produced using a glossy ink and a commonly used black (B) ink.

Further, as compared with the first colored powder and the first colored powder corresponding to cyan (C), magenta (M), and yellow (Y) used in known colored inks,
First, corresponding to red (R), green (G), and blue (B), which have a relatively small particle size and which have a complementary color relationship with each color component of cyan (C), magenta (M), and yellow (Y). 1 color or multiple colors of metallic luster ink consisting of 2 colored powders and metallic luster powder that increases the amount of reflected light when observed in a specular reflection area with respect to a light source, and commonly used black ink It is a printed matter produced by using and.

The printed matter printed with these metallic luster ink and black ink has three primary colors of ink, that is, cyan (C), magenta (M) and On the printed surface of the metallic luster ink containing the first colored powder corresponding to yellow (Y), the amount of light reflected by the glittering material was small, and the three primary colors of ink, namely cyan (C) and magenta, were used. Based on the principle of subtractive color mixing of (M) and yellow (Y),
Gradient colors are reproduced and observed by the human eye. That is, cyan (C), magenta (M), yellow (Y)
Gold containing the first colored powder corresponding to
When an image is formed by a halftone dot area ratio capable of reproducing neutral gray with a metallic gloss ink, that is, a halftone dot area ratio of cyan (C), magenta (M), and yellow (Y) is 50%, respectively. , 45%, 45
%, It means that a gray color is observed, and this gray color is a visibility image of substantially the same level when compared with a gray or black or black ink print image containing at least a part of black ink. Can be recognized.

On the other hand, when this printed matter is observed in the regular reflection light region with respect to the illumination light source, the first primary colors corresponding to the three primary colors of ink, that is, cyan (C), magenta (M), and yellow (Y). On the printed surface of the metallic luster ink containing the colored powder, the amount of light reflected by the glittering material increases, so that the metallic luster color is predominantly observed. Alternatively, when the second colored powder is mixed, the intermediate color obtained by combining the fine particle colored powder mixed as the second colored powder and the metallic luster color is predominantly observed. . As a result, the metal light containing the first colored powder corresponding to cyan (C), magenta (M), and yellow (Y) is mixed.
When an image is formed with halftone dot area ratios capable of reproducing neutral gray with Sawa ink, that is, cyan (C), magenta (M), and yellow (Y) halftone dot area ratios are 50%, At 45% and 45%, compared with the printed matter observed in the area other than the regular reflection light area with respect to the illumination light source, in the neutral gray image,
White light due to an additive color mixture of red (R), green (G), and blue (B), which are the three primary colors of metallic luster color and light, is predominantly observed, and gray or black containing at least a part of black ink, or black Compared with the printed image,
The color becomes relatively unrecognizable.

This is cyan (C), magenta (M),
Fine particle pigments having excellent transparency corresponding to the color components of red (R), green (G), and blue (B), which have a complementary color relationship with each of yellow (Y), relatively easily transmit incident light, This is because it affects the coloring of the specular reflection light region of the metallic luster ink. On the other hand, the colored powders of cyan (C), magenta (M), and yellow (Y) are relatively likely to scatter incident light, and this is because it affects coloring of the diffuse reflection area of the glitter ink. .

[0025]

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 show a metallic luster ink corresponding to cyan color,
That is, it shows the angle dependence of color in the developed product (a) of the ink containing the metallic luster powder and the cyan pigment and the developed product (b) of the commercially available black ink. Measured using a gonio-spectrophotometer GSP-1 type [Murakami Color Co., Ltd.],
Fix the incident light of the light source on the measurement sample at 45 °,
It is measured by changing the light receiving angle from −10 ° to 70 °.

FIG. 1 is a graph showing the relationship between L * and the light receiving angle of the CIE-L * a * b * color system. Incident light angle 45 °
On the other hand, in the measurement result (1) of the developed product of the metallic luster ink, L * is 50 to 100 except the specular reflection light amount range.
, A relatively small value is shown, but a maximum value of 250 is shown in the specular reflection light region. On the other hand, in the measurement result (2) of the developed product of the black ink, L * does not show the angle dependence but always shows a constant value. That is, in the regular reflection light region, the amount of reflected light of the metallic luster ink becomes extremely larger than that of the black ink, and the color reaching the eyes shows a color peculiar to the metallic luster powder or white light.

FIG. 2 is a graph showing the relationship of a * -b * showing the hue change of the CIE-L * a * b * color system. The money
In the measurement result (1 ') of the color-developed product with the glossy ink, the hues, that is, a * and b *, greatly changed depending on the observation angle, and particularly, the peculiar change was observed at the light receiving angle of 45 °. I understand. On the other hand, the measurement result (2 ') of the color-developed product with the black ink shows a small change in the center of the graph, which means that the angle dependence of the color is extremely smaller than that of the metallic luster ink. ing.

That is, by combining a black ink and an image printed using the metallic luster ink or the like, it is possible to recognize an image having glint and gradation at first glance. The chromatic image is recognized as an arbitrary image when observed with respect to the illumination light source in a region other than the specular reflection light region, but in the specular reflection light region, metallic luster and red (R), green (G), blue The white light resulting from the additive color mixture of the three primary colors of light due to (B) becomes dominant over the color components of cyan (C), magenta (M), and yellow (Y), which are the three primary colors of the ink, so that cyan ( Colors are difficult to recognize due to the effect of erasing the color components of C), magenta (M), and yellow (Y).

The physical properties and composition of the metallic luster ink used in the present invention are as follows, and are constituted by including at least colored powder and metallic luster powder.

The film-forming binder used in the present invention disperses a metallic luster powder, a first colored powder and a second colored powder to form a printing surface, and the kind thereof is not particularly limited. However, known coating resins and ink resins can be used. As the resin used as such a film-forming binder, for example, a basic resin such as an acrylic resin, a polyester resin, an alkyd resin, a silicon resin, or a fluororesin is mixed with a crosslinking agent such as an amino resin or an isocyanate compound, if necessary. The thermoplastic resin can be mentioned. In addition, there are UV or UV curable and electron beam or EB curable resins containing epoxy rings, oxetanyl groups, acryloyl groups and methacryloyl groups. In addition, a two-component polyurethane resin that is dried or cured at room temperature, a coating resin such as a two-component silicone resin, or the like can be used. These film-forming binders may be used alone or in combination of two or more.

The first colored powder forms the basic color of the anti-counterfeiting metallic luster ink of the present invention, and can be composed of the following known coloring materials according to each color. Examples of the blue powder include inorganic powders such as ultramarine blue, dark blue (Prussian blue), and cobalt blue, and phthalocyanine-based, slene-based, azo-based, and anthraquinone-based C.I. I. Examples of the organic pigments belonging to Pigment Blue and red powders include inorganic powders such as cadmium red, red iron oxide and molybdenum red, and C.I. such as azo, quinacridone, perylene and lake red. I. Pigment Red Organic pigment,
As yellow powder, chrome yellow, cadmium yellow, inorganic powder such as titanium yellow and quinophthalone-based powder,
C.I. such as azo type and isoindoline type. I. Examples of the organic pigments belonging to Pigment Yellow and purple powders include inorganic powders such as cobalt purple and manganese purple, and C.I. such as oxazine-based, azo-based, and anthraquinone-based pigments. I. Examples of the organic pigments and green powders belonging to Pigment Violet include inorganic powders such as chrome green and cobalt green, and C.I. I. An organic pigment belonging to Pigment Green can be used. The anti-counterfeit metallic luster ink is an ink made by adding additives and vehicles to these known coloring materials. Further, it is possible to adjust a colorant having an arbitrary color tone by combining several colors of these powders. In addition, known colored inks such as offset inks and gravure inks used in general printing can also be used as the colored material.

As the metallic luster powder used in the present invention, known scale-like particles blended in the coating film for imparting a metallic feeling to the coating film can be used without limitation. Specific examples of metallic powder include aluminum flakes, nickel flakes, titanium flakes, stainless steel flakes,
Examples of the metal flakes include alloy flakes such as brass.
Among them, aluminum flakes are preferable in view of glitter and cost performance. Commercially available metallic powder can be used, for example, aluminum paste manufactured by Toyo Aluminum Co., Ltd., Showa Aluminum Powder Co., Ltd.
Aluminum paste and the like. Further, the metallic powder may be blended alone, but may be blended in combination of two or more. In addition, known metallic luster inks such as offset inks and gravure inks used in general printing can also be used as the metallic material.

As the transparent fine particle pigment which is the second colored powder used in the present invention, a coloring pigment selected from iron oxide-based and composite metal oxide-based coloring pigments can be used. This transparent fine particle pigment has a particle size relatively smaller than that of the first colored powder and is excellent in transparency. Preferably, an inorganic pigment having a small hiding power of about 0.01 to 0.1 μm is used.

The printed matter using the metallic luster ink and the black ink is prepared by a gravure printing method, an offset printing method, a screen printing method, an intaglio printing method and other known printing methods, as well as a spray method used for sheet metal coating and the like. Any means for forming a coating film can be used.

The present invention will be described in more detail by way of examples. FIG. 3 shows the composition of the metallic luster ink used in this example. The first colored powder is phthalocyanine blue H based on a commercially available metallic luster offset ink.
[Sanyo Pigment Co., Ltd.], Permanent Carmine FB [Sanyo Pigment Co., Ltd.], Irgadine 2GLTE Yellow (CIBA-G
EIGY) as the second colored powder having a complementary color relationship with each of the cyan (C), magenta (M), and yellow (Y) color materials, respectively, and Dipiroxide TM # 3220, 332, respectively.
0 and 3410 [Dainichi Seika Co., Ltd.] metallic luster offset inks (CRS), (MGS) and (YB)
S) was adjusted. These three types of metallic luster ink (C
RS), (MGS) and (YBS) and a commercially available black ink, that is, Trans G (black ink), which is an offset black ink manufactured by DIC in this example, were combined and printed.

FIG. 4 shows a process for producing a printing plate film. The background color is moss green, and two visibility images having arbitrary gradations are shown in arbitrary wide colors, for example, A and The image (3) having the letter B is color-separated by a flatbed color scanner so as to form halftone dots of 175 lines (/ inch) generally used in offset printing, and each cyan (C) plate (4 ), A magenta (M) plate (5), a yellow (Y) plate (6), and a black (K) plate (7).
However, a film in which the black (K) component was removed from the background color other than the character A and the image portion of the character B was produced. next,
Using a positive or negative film for four colors of cyan (C) plate (4), magenta (M) plate (5), yellow (Y) plate (6), and black (K) plate (7) A baked PS plate for offset was produced. The prepared cyan (C) plate contains the metal corresponding to the cyan (C) color component.
Glossy ink (CRS), magenta (M) plate has the metallic luster ink (MG) corresponding to the magenta (M) color component.
S) and the yellow (Y) plate, the metallic gloss ink (YBS) corresponding to the color component of yellow (Y), and the background color other than the prepared letter A and the black (K) of the image portion of the letter B. The black (K) plate from which the components were removed was subjected to offset printing using a black ink.

The offset printed matter (8) shown in FIG. 5 produced by the above-mentioned process has a metallic appearance as compared with the original image (3) which becomes an original when observed in a region other than the regular reflection light region with respect to the light source.
It is reproduced as a printed matter having glossiness and gradation of colors, and it is recognized by the human eye as a printed matter (8) in which the background and the images of the characters A and B are emphasized to the same degree. On the other hand, when observing in the specular reflection light region, it becomes difficult to recognize the chromatic color of the background and the image portion of the character B formed only by the metallic gloss ink, and only the chromatic image of the character A in which the black ink is relatively present is present. As a result, the printed matter (8) was recognized as an emphasized printed matter (9), and as a result, the printed matter (8) having the viewing angle dependence of the color could be obtained.

FIG. 6 is an enlarged schematic view of the image of the character A and the image of the character B in the printed matter (8) of this embodiment. In the letter A, the dots forming the color elements are the metallic gloss inks CRS corresponding to the three primary colors of the ink color.
All colors are printed with (10), MGS (11), YBS (12) and black ink (13). on the other hand,
In the letter B, the halftone dots forming the color elements are 3 of the ink color.
Each metallic gloss ink CRS (1
0), MGS (11), and YBS (12) only.

That is, when the printed matter is observed at an arbitrary angle, the background color and the image of the character B are recognized, and it is observed as if only the image of the character A is projected from the background, and the observation angle is changed. By changing it arbitrarily, the effect of changing the image comes to be exhibited.

As described above, in this embodiment, the printed matter is observed in the specular reflection light region with respect to the light source by the metallic luster powder, that is, the aluminum powder, mixed in each metallic luster ink. In that case, the amount of reflected light increases and each metal light is observed.
Since the color derived from diffused light that should be observed from the first colored powder blended in the swab ink is more dominant, the color component that should be observed from the first colored powder disappears. ,
Only the silver color from the metallic luster powder or aluminum powder comes to be observed. Further, the color components of red (R), green (G), and blue (B), which are the second colored powder blended in the metallic luster ink, were synthesized with metallic luster color, that is, silver color from aluminum powder. Observed as a neutral color. That is, red (R), which is the three primary colors of light,
The principle of additive color mixing of green (G) and blue (B) allows white light to reach the human eye predominantly. Therefore, the relative decoloring effect of colors to be observed is further improved by the principle of subtractive color mixing in the three primary colors, as compared with an image including at least a part of black ink.

As a result, the image observed with respect to the light source in a region other than the specular reflection light region is relatively compared with the image in which the black ink is contained in at least a part of the specular reflection light region. At first glance, only the character image of A appears to appear as it disappears.

In the present embodiment, the printing surface of the metallic gloss ink and the black ink corresponding to the three primary colors of each color forms the 175-line halftone dot used in general offset printing. The color elements of the printed matter are not limited to the dot structure. That is,
Whatever color element shape is used, it can be applied to all image line configurations which are observed as an image having gradation with human eyes. For example, the gold corresponding to the three primary colors
A composition that can be recognized as a color can also be obtained by composing the metallic gloss ink and the black ink with four fine lines.

[0043]

INDUSTRIAL APPLICABILITY In the present invention, printed matter obtained by combining each colored metallic luster ink corresponding to cyan (C), magenta (M) and yellow (Y) and a black ink is The presence or absence of an image can be determined at a glance depending on the observation angle, and even a special device and a skilled appraiser can instantly make a true / false decision. Further, in the case of the copy made by the color copying machine, the influence of the color of the powder compounded as the first colored pigment becomes dominant, and an image similar to the printed matter observed outside the specular reflection light region is reproduced. So
No change in the image is observed even if the angle is changed. Therefore, the genuineness / counterfeit printed matter according to the present invention cannot reproduce the same angular dependence of color as the original even if a copy is produced by a high-performance color copier, and at first glance it is regarded as a copy. It is possible to judge and it is easy to differentiate from genuine bills. In addition, because it is a metallic luster ink, the light from the light source of the copying machine is
Since relatively many reflections occur, it is not possible to completely reproduce the color tone of the printed matter as a whole.

[Brief description of drawings]

FIG. 1 is a graph showing L * in a CIE-L * a * b * color coordinate system of a color-developed product using a metallic luster ink and a black ink.

FIG. 2 is a graph showing a * b * in a CIE-L * a * b * color system of a color-developed product using a metallic luster ink and a black ink.

FIG. 3 is a diagram showing a composition of a metallic gloss ink in an example.

FIG. 4 is a diagram showing a manufacturing process of a printing plate film used in Examples.

FIG. 5 is a diagram showing the viewing angle dependence of the recognition image of the example.

FIG. 6 is a diagram showing an enlarged schematic view of an example.

A * b * measurements 2 black ink according Exhibition colored article of L * measurements 1 'metallic luster inks according Exhibition colored article of the REFERENCE NUMERALS] 1 metallic luster inks according Exhibition colored article (a) (a) ( b) L * measurement result 2 ′ a * b * measurement result of the color-developed product (b) with black ink 3 Image having characters A and B as the original in the example 4 Cyan plate film 5 Magenta plate Film 6 Yellow plate film 7 Black plate film 8 Image 9 of the example recognized in other than the specular reflection region 9 Image 10 of the example recognized in the specular reflection region 10 Halftone dot of metallic gloss ink CRS in the example 11 Halftone dots of metallic gloss ink MGS in Examples 12 Halftone dots of metallic gloss ink YBS in Examples 13 Halftone dots of black ink in Examples

Claims (6)

(57) [Claims] 1. A two-or-more visibility image having an arbitrary gradation and a background image are arranged on a base material, and are arranged in a positive direction with respect to an illumination light source.
At least one of the visibility images cannot be recognized depending on the viewing angle of the reflected light region, which is a genuine / counterfeit discrimination printed matter, wherein at least one of the visibility images having any gradation is provided. 1
The two visibility images are composed of at least one color metallic gloss ink and ink having a small dependence of color on the viewing angle, and the remaining visibility image and the background image having arbitrary gradations are , Consisting only of at least one color of metallic luster ink
And, wherein it is composed of color different from the two or more visibility and background images having arbitrary tone, when observed in the specular reflected light region with respect to the illumination source, before
It is composed only of metallic luster ink of at least one color
The visibility image and the background image have a large amount of reflected light.
The true / false discrimination printed material is characterized by the fact that the color difference becomes unrecognizable . 2. The genuine / counterfeit printed material according to claim 1, wherein the ink whose color has a small viewing angle dependency is particularly black or black. 3. The metallic luster ink includes at least an arbitrary first colored powder and metallic luster powder, and a component ratio of the first colored powder and metallic luster powder is 99: by weight.
The authenticity / fake discriminating printed matter according to claim 1 or 2, wherein the printed matter is in the range of 1 to 1:99. 4. The metallic luster ink includes at least an arbitrary first colored powder, a second colored powder having a particle diameter relatively smaller than that of the first colored powder, and a metallic luster powder, The component ratio of the first colored powder to the second colored powder is in the range of 99: 1 to 1:99 in weight ratio, and the first colored powder and the second colored powder The true / false discrimination printed matter according to claim 1 or 2, wherein the ratio of the colored powder component and the component of the metallic luster powder in the range of 99: 1 to 1:99 by weight. 5. The color of the second colored powder is the first color.
5. The authenticity-determining printed matter according to claim 1, 2 or 4, wherein the color of the colored powder and the complementary color are in a relationship of complementary color. 6. An image composed of two or more visibility images having an arbitrary gradation and a background image is color-separated at an arbitrary screen ruling by a color scanner to obtain a cyan (C) plate, Each plate surface including a magenta (M) plate, a yellow (Y) plate, and a black (B) plate is prepared, and at least one visibility of the prepared black (B) plate surface of the visibility image having the arbitrary gradation is confirmed. A black plate (B ') in which the black (B) component has been removed from the sexiness image and the background image is prepared, and the metallic luster image is applied to the cyan (C) plate, the magenta (M) plate and the yellow (Y) plate. The printing method according to any one of claims 1 to 3, wherein the black (B ') plate is formed by printing an ink having a small viewing angle dependency on the black (B') plate. Alternatively, the method for producing a genuine / counterfeit printed matter according to item 5.