JP2000037941A - Authenticated printed matter and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a practical genuineness identifiable printed matter which can be easily identified instantaneously even by a general person. SOLUTION: This printed matter has part of its printed area printed in a single or plural different colors of sheeny ink composed of colored pigments corresponding to three elementary colors (cyan, magneta and yellow) and a metallic glossy pigment. In addition, at least part of the printed area is printed in an ink whose color angle dependence is low. Therefore, a recognizable color image changes following the variation of an observation angle, hence the unnecessity to use a special appraisal device even by an average person. Thus it is possible to instantaneously identify the genuineness of printed matter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the field of security prints requiring new designs and anti-counterfeiting effects, such as banknotes, passports, securities, identification cards, cards, passports, valuable prints and important documents. The present invention relates to a colored metallic ink which is preferably used, and a printed matter formed therefrom which has a forgery prevention and authenticity discriminating effect.

[0002]

2. Description of the Related Art Recently, with the diversification of consumer values in automotive coatings and coatings, there has been an increasing demand for exterior coatings having new aesthetics, fashionability and luxury. Further, there is a demand for a printing technique having a new design property and a high anti-counterfeiting effect for printed matter such as important documents requiring security. For this reason, in recent years, by combining special glittering materials such as interference mica, oxidized flake mica, and pigment-coated aluminum flakes with inks and paints, printed matter with excellent color, flip, and flop properties that cause a color change depending on the viewing angle. And have obtained a coating.

[0003] Here, the color flip-flop property means the angle dependence of the color, that 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 color brightness is called flip-flop property, and the property of changing hue is called color flip-flop property.

[0004] Techniques utilizing the above special glittering material exhibiting such properties include, for example, a mixture of a conventional flaky metal pigment and a flaky metal pigment whose surface is coated with a colored pigment (Japanese Patent Laid-Open No. No. 142862), interference mica whose surface is coated with titanium oxide, metallic paint using colored mica whose surface is coated with iron oxide or an organic pigment, and paint in which flaky colored aluminum pigment and mica are used in combination (Japanese Unexamined Patent Publication No. 7071
No. 9) has been proposed.

[0005] Further, Japanese Patent Application Laid-Open No. H4-202477 discloses that mica-like aluminum solid solution red iron oxide is blended.
A resin composition capable of forming a coating film having excellent flip-flop properties is described. In addition, JP-A-7-292994 discloses that a plurality of flaky colored pigments having different color tones are combined or a flaky colored metallic pigment is combined with an organic pigment having a different color from the pigment to form a color flip-flop. A color flip-flop metallic paint capable of forming a coating film having excellent properties is described.

In recent years, with the development of color copying machines, it has become possible to make elaborate copies that are difficult to distinguish from genuine ones, and counterfeiting of securities, checks, banknotes, etc. by the copying machines has been occurring. These copied and counterfeit printed matter can be easily identified as fake by a skilled expert or a special appraiser, but securities are available in many types and widely distributed, and there is an opportunity for ordinary people to handle it. Many. For this reason, relying on a skilled appraiser or a special appraiser to determine the authenticity of all securities and the like is not a practical means, and it is desired that ordinary people can easily and instantly make a decision. Recently, as a method of determining the authenticity of such securities and the like, recently, methods that utilize the angle dependence of color by blending the special glittering material or the like into ink are increasing, and are simply increasing. A color copy-prevented printed matter using ink using a conventional glittering material or the like utilizing the angle dependence of color is easily forged.

[0007] However, a printed matter made of an ink containing such a special glittering material is expensive because the glittering material itself is expensive, which increases the cost of the printed matter. In addition, such printed materials utilize only the angle-dependent properties of color due to their glitter, and can be easily obtained by obtaining similar or similar glitter materials and kneading them with inks and paints. Will be forged.

In view of the above, not only the color difference between the printed matter and the color copy is remarkable, but also if the special brilliant material is simply obtained and blended into the ink or paint, etc. It has been desired to develop a printing technique that cannot easily reproduce the angle dependence of color in printed matter.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an arbitrary visibility image can be formed by changing an observation angle to at least a part of the visibility image. Is to provide a printed matter that appears and erases In other words, not only the color difference between the real printed matter and the color copy is remarkable, but also by simply obtaining a similar or similar glittering material, the printed matter cannot produce the same angle-dependent effect as the real thing, and its production. An object of the present invention is to provide a method, in which the printed matter can be determined at a glance whether or not an image is present based on an observation angle, and can be easily and instantaneously determined for authenticity without a special device or a skilled expert.

[0010]

According to the present invention, two or more visibility images having arbitrary gradations and a background image are arranged on a base material, and at least one of the visibility images is arranged depending on an observation angle. A true / false discrimination printed material characterized in that two visibility images become unrecognizable, wherein at least one visibility image among the visibility images having the arbitrary gradation is formed from at least one or more brilliant inks. , And a background image having at least one remaining gradation, and a background image having at least one color or more. A true / false discrimination print, which is a combination of two or more visibility images having an arbitrary gradation and an image of a different color from the background image. .

[0011] In addition, the true / false discrimination printed material is characterized in that the color having a small viewing angle dependence is particularly black or black.

Further, the glitter ink is a glitter ink containing at least an arbitrary first colored powder and a metallic luster powder, wherein the component ratio of the first colored powder and the metallic luster powder is The authenticity discrimination print is characterized in that the weight ratio is in the range of 99: 1 to 1:99.

The brilliant ink includes at least an arbitrary first colored powder, a second colored powder having a smaller particle diameter than the first colored powder, and a metallic lustrous powder. The first colored powder and the second colored powder have a component ratio of 99: 1 to 1:99 by weight, and the first colored powder and the second colored powder have a weight ratio of 99: 1 to 1:99. Second
A true / false discrimination printed material characterized in that the weight ratio of the colored powder component, which is the sum of the colored powders, and the component ratio of the metallic luster powder is in the range of 99: 1 to 1:99.

Further, the authenticity discrimination printed material is characterized in that the color of the second colored powder has a complementary color 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 by an arbitrary screen ruling by a color scanner,
Cyan (C) version, magenta (M) version, yellow (Y)
Plate and black (B) plate are prepared, and the black (B) plate is prepared from at least one of the visibility image having the arbitrary gradation and the background image of the black (B) plate prepared above. Black plate with components removed (B ')
And the glitter ink is printed on the cyan (C) plate, magenta (M) plate, and yellow (Y) plate, and the observation angle dependence is small on the black (B ′) plate. This is a method for producing a true / false discrimination print, which is formed by printing ink.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In the authenticity discrimination print of the present invention, at least a part of a printing place is printed with one or more colors with a brilliant ink, and at least a part of the printing place depends on an angle of color. By changing the viewing angle, the visible image of at least a part of the printed portion can be erased at any viewing angle to make the image non-visible, and the viewing angle can be changed. Thereby, it can be made to appear again and the visibility can be improved.

Color prints having a general gradation and reproducing a wide range of colors include cyan (C), magenta (M),
Printing using four color inks obtained by adding black (B) to three primary color components of yellow (Y), that is,
Color reproduction is performed based on the principle of subtractive color mixing of colors.

According to the present invention, cyan (C), magenta (M), and yellow (Y) color components of a general color print are used.
By blending the metallic luster powder with the ink blended with the first colored powder corresponding to each color component such as ink, the amount of reflected light from the illumination light source with respect to the printed matter at any observation angle increases, Cyan (C) which is a color component,
The amount of light from magenta (M), 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 color is extremely small. Therefore, it utilizes the fact that it is recognized to the human eye at any viewing angle.

Further, a metallic glossy powder is added to an ink containing a first colored powder corresponding to each of the color components of cyan (C), magenta (M), and yellow (Y), which are the color components of a general color print. Further, as the second colored powder, red (R), green (G), and the like, which have a complementary color relationship with each color component of cyan (C), magenta (M), and yellow (Y),
By blending a fine-particle pigment having excellent transparency corresponding to blue (B), the amount of reflected light from a light source is increased at any observation angle, and red (R) and green (G) blended as complementary color components , Blue (B) and the 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 has extremely small color angle dependence. Is based on the fact that it is recognized to the same extent by human eyes.

That is, the authenticity printed matter of the present invention comprises the first colored powder corresponding to cyan (C), magenta (M), and yellow (Y) used in known colored inks, and a light source. On the other hand, when observed in the specular reflection area, the ink was produced using a glitter ink of one or more colors composed of a metallic luster powder that increases the amount of reflected light, and a commonly used black (B) ink. It is a printed matter.

The first colored powder corresponding to cyan (C), magenta (M), and yellow (Y) used in known colored inks is compared with the first colored powder.
Particles having a relatively small particle diameter and corresponding to red (R), green (G), and blue (B), which have a complementary color relationship with each color component of cyan (C), magenta (M), and yellow (Y). One or more brilliant inks consisting of a colored powder of No. 2 and a metallic luster powder that increases the amount of reflected light when observed in a specular reflection region with respect to a light source, and a black ink commonly used This is a printed matter produced using the above.

Printed matter printed with these brilliant inks and black ink, when observed in a region other than the specularly reflected light region with respect to the illumination light source, has three primary colors of ink, namely, cyan (C), magenta (M), On the printing surface of the glitter ink mixed with the first colored powder corresponding to yellow (Y), the amount of reflected light by the glitter material is small, and the three primary colors of the ink, namely, cyan (C) and magenta (M), based on the principle of subtractive color mixing of yellow (Y),
Colors having gradations are reproduced and observed by human eyes. That is, cyan (C), magenta (M), yellow (Y)
When an image is constituted by a halftone dot area ratio capable of reproducing a neutral gray by using a glittering ink in which the first colored powder corresponding to the above is mixed, that is, cyan (C) and magenta (M) , Yellow (Y)
Is 50%, 45%, and 45%, respectively, a gray color is observed, and the gray color is printed in gray, black, or black containing at least a part of black ink. When compared with the image, it can be recognized as a sufficiently similar visibility image.

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

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

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show the color of the glittering ink corresponding to the cyan color, that is, the coloring (a) of an ink containing a metallic luster powder and a cyan pigment and the coloring (b) of a commercially available black ink. This shows the angle dependency.
The measurement was performed using a goniospectrophotometer GSP-1 (Murakami Color Co., Ltd.), and the incident light of the light source on the measurement sample was fixed at 45 °, and the light receiving angle was changed from -10 ° to 70 °. Measured.

[0026] Figure 1 is a graph showing the relationship between CIE-L ^* a ^* b ^* color system of L ^* and the light receiving angle. Incident light angle 45 °
On the other hand, in a region other than the specular reflection light range, in the measurement result (1) of the glitter ink, the L ^* shows a relatively small value of 50 to 100. Then, a value of 250 is shown at the maximum. On the other hand, in the measurement result (2) of the colored material of the black ink, L ^* does not show the angle dependency and always shows a constant value. That is, in the specular reflection light region, the glittering ink has an extremely large amount of reflected light as compared with the black ink, and the color reaching the eyes shows the inherent color of the metallic luster powder or white light.

FIG. 2 is a graph showing an a ^* -b ^* relationship indicating a hue change in the CIE-L ^* a ^* b ^* color system. The measurement result (1 ') of the colored material with the glitter ink shows that the hues, that is, a ^* and b ^* greatly change depending on the observation angle, and show a peculiar change particularly at a light receiving angle of 45 °. I understand. On the other hand, the measurement result (2 ') of the colored material with the black ink changes slightly at the center of the graph, which means that the angle dependence of the color is extremely small as compared with the glitter ink. ing.

That is, by combining the image printed using the black ink and the glitter ink or the like,
Any chromatic image that can be recognized at a glance with a brilliant image and has a gradation is recognized as an arbitrary image when observed in a region other than the specular light region with respect to the illumination light source. In the specular reflection light region, cyan (C), which is the three primary colors of the ink, is generated by metallic gloss and white light resulting from additive mixing of the three primary colors of red (R), green (G), and blue (B). Since the color components become more dominant than the magenta (M) and yellow (Y) color components, the color becomes difficult to recognize due to the decoloring effect of the cyan (C), magenta (M), and yellow (Y) color components.

The physical properties and composition of the glittering ink used in the present invention are as follows, and include at least a colored powder and a metallic luster powder.

The film-forming binder used in the present invention forms a printing surface by dispersing a metallic luster powder, a first colored powder and a second colored powder, and the type thereof is not particularly limited. However, known resins for paints and inks can be used. As a resin used as such a film-forming binder, for example, an acrylic resin, a polyester resin, an alkyd resin, a silicon resin, a basic resin such as a fluororesin, and a crosslinking agent such as an amino resin or an isocyanate compound mixed as necessary. Formed thermoplastic resin. In addition, there are ultraviolet or UV curable and electron beam or EB curable resins having epoxy rings, oxetanyl groups, acryloyl groups and methacryloyl groups. In addition, paint resins and the like such as a two-pack polyurethane resin and a two-pack silicone resin which are dried or cured at room temperature 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-counterfeit glitter 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, navy blue (Prussian blue), and cobalt blue, and phthalocyanine, sllen, azo, and anthraquinone C.I. I. Organic pigments belonging to C.I. Pigment Blue and red powders include inorganic powders such as cadmium red, red iron oxide and molybdenum red, and C.I. powders such as azo, quinacridone, perylene and lake red. I. Pigment Red organic pigments, as yellow powder, chrome yellow, cadmium yellow, titanium yellow and other inorganic powders and quinophthalones,
C. such as azo and isoindoline type I. Examples of organic pigments and purple powders belonging to CI Pigment Yellow include inorganic powders such as cobalt violet and manganese violet, and C.O.-based, azo-based and anthraquinone-based C.I. I. Pigment Violet, organic pigments and green powders include inorganic powders such as chromium green and cobalt green, and C.I. I. An organic pigment belonging to Pigment Green can be used. The anti-counterfeit glitter ink is obtained by adding an additive and a vehicle to these known coloring materials. A colorant having an arbitrary color tone can also be adjusted by combining these powders in several colors. In addition, known colored inks such as offset ink and gravure ink used in general printing can be used as the colored material.

As the metallic luster powder used in the present invention, known flaky particles blended in a coating film to impart a metallic feeling to the coating film can be used without limitation. Specific examples of metallic powders include aluminum flake, nickel flake, titanium flake, stainless steel,
Metal flakes such as alloy flakes of brass and the like can be given.
Among them, aluminum flake is preferable in consideration of glitter and cost performance. Commercially available metallic powders can also be used, for example, aluminum paste manufactured by Toyo Aluminum Co., Ltd., Showa Aluminum Powder Co., Ltd.
Aluminum paste. The metallic powder may be used alone or in combination of two or more. In addition, known metallic glossy 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 as 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. The transparent fine particle pigment has a relatively small particle size and excellent transparency compared to the first colored powder. Preferably, an inorganic pigment having a small hiding power having a particle diameter of about 0.01 to 0.1 μm is used.

The printing method using the glittering ink and the black ink includes a gravure printing method, an offset printing method, a screen printing method, an intaglio printing method and other known printing methods, and 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 with reference to examples. FIG. 3 shows the composition of the glitter ink used in this example. The first colored powder is phthalocyanine blue H based on a commercially available metallic gloss offset ink.
[Sanyo Dyeing Co., Ltd.], Permanent Carmine FB [Sanyo Dyeing Co., Ltd.], Irgazine 2GLTE Yellow (CIBA-G
EIGY), and as a second colored powder having a complementary color relationship with each of the cyan (C), magenta (M), and yellow (Y) coloring materials, dipyroxide TM # 3220, 332, respectively.
Glitter offset inks (CRS), (MGS) and (YBS) containing 0 and 3410 [Dainichi Seika Co., Ltd.]
Was adjusted. These three types of glittering inks (CR
S), (MGS) and (YBS) were combined with a commercially available black ink, that is, trans G (black), which is an offset black ink manufactured by DIC in this example.

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. The image (3) having the character B is color-separated by a flatbed color scanner so as to form a halftone dot of 175 lines (/ inch) generally used in offset printing, and each cyan (C) plate (4) is separated. ), A positive plate or a negative plate for the magenta (M) plate (5), the yellow (Y) plate (6), and the black (K) plate (7).
However, for the background color other than the character A and the image portion of the character B, a film was prepared in which the black (K) component was removed. next,
Using a positive or negative plate 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 glitter ink (CRS) corresponding to the color component of cyan (C) is used for the produced cyan (C) plate, and the glitter ink (CRS) corresponding to the color component of magenta (M) is used for the magenta (M) plate. MGS)
And the yellow (Y) plate, the glitter ink (YBS) corresponding to the yellow (Y) color component, and the background color other than the prepared character A and the black (K) component of the image portion of the character B. Offset printing was performed on the removed black (K) plate using black ink.

The offset printed matter (8) shown in FIG. 5 produced by the above-described process has a brilliant property compared to the original image (3) which becomes an original when observed in a region other than the specularly reflected light region with respect to the light source. And the printed matter (8) is reproduced as a printed matter having a color gradation, and is recognized as a printed matter (8) in which the background and the images of the characters A and B are emphasized to the same degree by human eyes. Observation in the area makes it difficult to recognize the chromatic color of the image portion of the background and the character B formed only by the glitter ink, and only the chromatic image of the character A where the black ink is present is emphasized. This was recognized as (9), and as a result, a printed matter (8) having a viewing angle dependency of color could be obtained.

FIG. 6 is an enlarged schematic diagram of an image of a character A and an image of a character B in the printed matter (8) of the present embodiment. In the letter A, the halftone dots forming the color elements are the glitter inks CRS (1) corresponding to the three primary colors of the ink.
0), MGS (11), YBS (12) and black ink (13) are printed in all colors. On the other hand, in the character B, the halftone dots forming the color elements are the glitter inks CRS (10) and M corresponding to the three primary colors of the ink.
It is printed only with GS (11) and YBS (12).

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 only the image of the character A is observed as if it emerged from the background. By making the change arbitrarily, the effect of changing the image comes to be shown.

As described above, in the present embodiment, when the printed matter is observed in the regular reflection light region with respect to the light source by the metallic gloss powder, ie, the aluminum powder, blended in each glitter ink, the amount of reflected light is reduced. Since it is observed to increase and becomes more dominant than the color derived from diffused light to be observed from the first colored powder blended in each glitter ink, it should be observed from the first colored powder. The color component disappears, and only the silver color from the metallic luster powder, ie, the aluminum powder, is observed. Further, the color components of the second colored powder red (R), green (G), and blue (B) blended in the glitter ink were synthesized with a metallic luster color, that is, a silver color from aluminum powder. Observed as a neutral color. That is, white light comes to reach human eyes predominantly by the principle of additive color mixture of the three primary colors of light, red (R), green (G), and blue (B). Therefore, as compared with an image including at least a part of the black ink, the relative decoloring effect of colors to be observed by the principle of subtractive color mixing in the three primary colors is further improved.

Thus, the image observed in a region other than the specularly reflected light region with respect to the light source is compared with the image formed in the specularly reflected light region and including at least a portion of the black ink. At first glance, only the character image of A appears to stand out.

In this embodiment, the printing surface using the glitter ink and the black ink corresponding to the three primary colors of each color is:
Although 175 halftone dots used in general offset printing are formed, the color elements of the printed matter obtained by the present invention are not limited to the halftone dot configuration. In other words, whatever the configuration of the color element is, it can be applied to any image configuration that can be observed as an image having gradation by human eyes. For example, the glitter ink and the black ink corresponding to the three primary colors can be recognized as a color even if they are composed of four fine lines.

[0043]

According to the present invention, the printed matter obtained by combining each of the colored brilliant inks corresponding to cyan (C), magenta (M) and yellow (Y) with the black ink is an image depending on the observation angle. Can be determined at a glance, and the authenticity can be easily and instantaneously determined without a special device or a skilled appraiser. In the case of a copy made by a color copying machine, the influence of the color of the powder blended as the first colored pigment becomes dominant, and an image similar to the printed matter observed in a region other than the specular light region is reproduced. Therefore, even if the angle is changed, no change in the image is recognized. Therefore,
The authenticity discrimination printed matter according to the present invention cannot reproduce the same angle dependence of color as the original even if a copy is made by a high-performance color copier, and can be judged as a copy at a glance. , It is easy to differentiate from genuine notes. In addition, since the glitter ink reflects relatively more light from the light source of the copier than a general solid color ink, it is impossible to completely reproduce the color tone of the entire printed matter. Can not.

[Brief description of the drawings]

[1] in accordance exhibition colored article brilliant ink and black ink, a graph showing the L ^* on CIE-L ^* a ^* b ^* color system.

FIG. 2 is a graph showing a ^* b ^* in a CIE-L ^* a ^* b ^* color system of a color developed by a glitter ink and a black ink.

FIG. 3 is a view showing the composition of a glitter ink in an example.

FIG. 4 is a view showing a process for producing a printing plate film used in an example.

FIG. 5 is a diagram showing the observation angle dependency of a recognition image according to the embodiment.

FIG. 6 is an enlarged schematic view of the embodiment.

[Explanation of symbols]

1 Measurement results of L ^* of the painted material (a) with the glitter ink 1 ′ Measurement results of a ^* b ^* of the painted material (a) with the glitter ink 2 L ^{* of the} painted material (b) with the black ink 2 ′ Measurement result of a ^* b ^* of the colored material (b) with black ink 3 Image having A and B characters to be an original in Examples 4 Film for cyan plate 5 Film for magenta plate 6 Yellow plate Film for black plate 7 Film for black plate 8 Image of embodiment recognized in regions other than specular reflection region 9 Image of embodiment recognized in region of regular reflection light 10 Halftone dot of brilliant ink CRS in embodiment 11 Brightness in embodiment Halftone dots of bright ink MGS 12 Halftone dots of brilliant ink YBS in Examples 13 Halftone dots of black ink in Examples

Claims (6)

[Claims] 1. A method of arranging two or more visibility images and background images having arbitrary gradations on a base material,
At least one of the visibility images is a genuineness discrimination print, wherein at least one of the visibility images has an arbitrary gradation. The combination of an image composed of one or more brilliant inks and an image composed of an ink having a small color-observation-angle-dependent ink, and the remaining visible image having any gradation and the background image are , A combination of images comprising at least one brilliant ink, wherein the two or more visibility images having the arbitrary gradation and the background image are different in color. Authenticity printed matter. 2. The authenticity discrimination printed matter according to claim 1, wherein the ink having a small viewing angle dependence of color is particularly black or black. 3. The glitter ink includes at least any of a first colored powder and a metallic glossy powder, and the component ratio of the first colored powder and the metallic glossy powder is 99: 1 by weight.
The authenticity discrimination printed matter according to claim 1 or 2, wherein the printed matter is within a range from 1:99 to 1:99. 4. The brilliant ink includes at least an arbitrary first colored powder, a second colored powder having a smaller particle diameter than the first colored powder, and a metallic luster powder, The first colored powder and the second colored powder have a component ratio of the first colored powder to the second colored powder in a weight ratio of 99: 1 to 1:99. The authenticity discrimination printed matter according to claim 1 or 2, wherein the weight ratio of the colored powder component and the metallic luster powder, which is the sum of the components, is in the range of 99: 1 to 1:99. 5. The color of the second colored powder is the first color powder.
5. The printed matter according to claim 1, wherein the printed matter has a complementary color to the color of the colored powder. 6. An image composed of two or more visibility images having an arbitrary gradation and a background image is subjected to color separation at an arbitrary screen ruling by a color scanner, and a cyan (C) plate is provided. Each plate surface consisting of a magenta (M) plate, a yellow (Y) plate, and a black (B) plate was prepared, and at least one of the prepared black (B) plate surfaces was visually recognized as a visibility image having the arbitrary gradation. A black plate (B ′) in which the black (B) component is removed from the neutral image and the background image is prepared, and the glitter ink is applied to the cyan (C) plate, magenta (M) plate, and yellow (Y) plate. 6. The true according to claim 1, wherein the black (B ') plate is formed by printing an ink having a small viewing angle dependency on the black (B') plate. How to make a false discrimination print.