JP2002266289A - Paper for preventing forgery and forgery-preventing printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a paper for preventing forgery, in which only copy or print having color tone entirely different from a manuscript (real paper) is obtained when duplication by a color copying machine or printing by color scanner and color printer is carried out and a forgery-preventing printed matter. SOLUTION: In this paper for preventing forgery, a coating layer (1) mainly composed of a pearl pigment having rainbow color and an adhesive is formed on the surface of a base paper (B), and a coating layer (2) mainly composed of pearl pigment with rainbow color different from hue of the pearl pigment with rainbow color used for the coating layer (1) and an adhesive is formed on the surface of the base paper in a place different from the coating layer (1) and hues of these two pearl pigments with rainbow color have complementary color relation to each other. This forgery-preventing printed matter is obtained by applying printing of prescribed items to the paper for preventing forgery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to anti-counterfeit paper and anti-counterfeit prints. More specifically, the present invention relates to a forgery prevention paper and a forgery prevention print which can obtain only a copy or print of a color tone completely different from that of a manuscript (genuine article) even when copying by a color copying machine or printing by a color scanner and a color printer.

[0002]

2. Description of the Related Art In recent years, the accuracy of copying machines and printers has been remarkably improved, and in particular, the spread of electrophotographic color copying machines and color printers has facilitated forgery of various securities. To prevent this, various anti-counterfeiting measures have been considered, but one of them is that current color copiers and color printers use those that have brilliant properties, such as the inability to reproduce metal colors. There is something.

[0003] For example, as proposed in Japanese Utility Model Application Laid-Open No. 58-168754, a bright plate such as aluminum foil having a remarkable metallic color is provided on the upper surface of a base paper, and a character pattern is applied to the bright plate surface. There is a proposal of “paper that cannot be copied by a copying machine”. When this is copied, the character pattern applied to the paper surface becomes unreadable because the foil surface is darkened and copied when light is irradiated from the copying machine. This sheet has the advantage that copying itself cannot be performed (the copy cannot be read), but has the disadvantage that the metallic color is emphasized too much because the area of the glittering plate occupying the sheet is so uncomfortable. Another problem is that the paper manufacturing process becomes complicated and the cost is inevitably increased.

[0004] In order to solve these problems, the present inventors disclosed in Japanese Patent Application Laid-Open No. Hei 6-313298.
A forgery prevention paper characterized by forming a partial coating layer mainly composed of pearl pigment and adhesive on the base paper surface was proposed. The anti-counterfeit printed matter manufactured using the anti-counterfeit paper of this proposal is as follows: 1) Even if copying is attempted with a color copier, the gloss and hue of the pearl pigment layer provided on a part of the base paper cannot be reproduced. It is immediately possible to judge whether or not it is a forgery. 2) Since pearl pigments have a mild color,
Compared to anti-counterfeit paper using a metallic color brilliant plate, there is no sense of incongruity. 3) Paper can be manufactured by printing technology, so that small lot production can be handled. 4) Papermaking fibers can be easily collected from waste paper. It has excellent effects such as

[0005]

On the other hand, the anti-counterfeiting effect on anti-counterfeit paper and anti-counterfeit printed matter is required to be more and more advanced.
Forgery prevention paper having a coating layer containing a pearl pigment as disclosed in Japanese Patent No. 298 is required to have a higher degree of forgery prevention effect.

However, even for anti-counterfeit paper having a high anti-counterfeit effect, if the anti-counterfeiting means gives a sense of incongruity to the paper, or if a predetermined matter is printed on the paper to form a forgery-prevented printed matter, It must not adversely affect the printing of the matter.

Therefore, the present invention utilizes a coating layer containing a pearl pigment as a forgery prevention means, and can further enhance the forgery prevention effect, and furthermore, gives a feeling of strangeness to the paper surface or adversely affects printing of predetermined items. An object of the present invention is to provide a forgery-preventing paper that does not exert any influence, and to provide a forgery-prevention printed matter using the forgery-preventing paper.

[0008]

The anti-counterfeit paper of the present invention is described with reference to the reference numbers in FIG. A coating layer 1 is formed, and an iris pearl pigment different from the hue of the iris pearl pigment used for the coating layer 1 and an adhesive are coated on the surface of the base paper at a different location from the coating layer 1. A main coating layer 2 is formed, and the two iris-colored pearl pigments have a complementary color relationship with each other.

The pearl pigment used in the present invention emits an iris color, and is characterized in that the hue changes depending on the viewing angle. That is, for example, an iris-colored pearl pigment that looks red under diffusely reflected light can see blue-green pearl luster, which is complementary to red, under specularly reflected light. In the case of an iris-colored pearl pigment that looks blue-green under diffusely reflected light, the red pearl luster, which is its complementary color, can be visually recognized under specularly reflected light. Here, the complementary color refers to a relationship between two colors that become achromatic when light is mixed, and the colors on the opposite sides of the Munsell hue circle correspond to this. For example, blue-green for red and yellow-green for purple are examples. In the present invention, by using a pearl pigment emitting such an iris color, the forgery prevention effect can be enhanced.

Further, in the present invention, as the iris pearl pigments of the coating layer 1 and the coating layer 2, two iris pearl pigments of different colors whose hues are complementary to each other are used. For example, as the iris pearl pigment of the coating layer 1, a pigment that looks blue-green under diffusely reflected light and looks red under specularly reflected light is used. Those that look red, which is complementary to green, and which look blue-green under specularly reflected light, are used. Such coating layer 1
In the case of the combination of the coating layer 2 and the irregular reflection light, the blue-green color of the coating layer 1 and the red color of the coating layer 2 bring about an effect of enhancing the hue contrast, while the observation under the specular reflection light In some cases, the coating layer 1 looks red and the coating layer 2 looks blue-green, which gives a surprising feeling that the hue is reversed from that under observation under diffusely reflected light. Can be enhanced.

In the anti-counterfeit paper of the present invention, from the viewpoint of manufacturing, the coating layer 1 and the coating layer 2 may be formed as streak-like coating layers continuous in the flow direction of the base paper. preferable. Further, according to the present invention, it is possible to provide a forgery-prevention printed matter by forming a print layer on which predetermined items are printed on such forgery-prevention paper.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The base paper used in the present invention is softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulphite pulp (NBS)
P), mainly papermaking pulp such as thermomechanical pulp (TMP), to which a dry paper strength agent, a wet paper strength agent, a sizing agent, a fixing agent, a retention improver, a drainage improver,
An antifoaming agent, a dye, a coloring pigment, a fluorescent agent and the like are appropriately used in combination, and usually 550 to 250 ml of freeness. S. F. Using a well-known paper machine such as a fourdrinier paper machine or a round paper machine.

In the present invention, it is also possible to apply starch, polyvinyl alcohol, various surface sizes, etc. to the paper surface during the paper making process using a size press device or the like. Further, if necessary, a machine calendering treatment or a super calendering treatment is performed to appropriately improve the surface smoothness.

The base paper used in the present invention may be provided with other forgery prevention means in advance. For example, plowing, dyed fiber or ultraviolet fluorescent coloring fiber that emits visible light with ultraviolet or infrared light, infrared fluorescent coloring fiber, ultraviolet fluorescent coloring particles,
Known countermeasures for preventing forgery, such as mixing of infrared fluorescent coloring particles and the like, and threading, can be added to the base paper.
Thereby, the forgery prevention effect can be further enhanced.

The iris pearl pigment used in the present invention includes, for example, those obtained by forming a thin film of a metal oxide such as titanium oxide on the surface of mica powder. By precisely controlling the thickness of the metal oxide thin film to fall within a certain range, a pearl pigment exhibiting iris color can be obtained. In the present invention, any of those manufactured and sold as "iris type pearl pigments" by pearl pigment manufacturers can be used.

The adhesive used in the present invention is a starch aqueous solution,
Casein aqueous solution cut with alkali, styrene-butadiene copolymer latex, methyl methacrylate-butadiene copolymer latex, polyvinyl acetate emulsion,
Aqueous adhesive consisting of a single or a mixture such as polyacrylate emulsion, phenol resin, alkyd resin, petroleum resin, vinyl resin, polyamide resin,
An adhesive obtained by dissolving an acrylic resin, nitrocellulose, cyclized rubber, chlorinated rubber or the like alone or in a mixture in an organic solvent can be used.

The proportion of the iris pearl pigment and the adhesive in the coating solution for forming the coating layer is such that the higher the proportion of the iris pearl pigment, the higher the iris pearl luster, but the higher the iris pearl luster. Since the strength is insufficient, the adhesive is usually 50 to 500 parts with respect to 100 parts of the iris-colored pearl pigment in terms of dry weight. At this time, a water-proofing agent, a curing agent, a coloring agent, a viscosity modifier, an anti-blocking agent, a preservative, a fungicide, and other auxiliary materials are appropriately used in the coating liquid as long as the object of the present invention is not impaired. Can also.

When the coating liquid thus produced is coated on the surface of the base paper to form a coating layer, the coating thickness (in terms of dryness) is too thin, and the pearlescent luster of iris is lost. If the thickness is too large, adverse effects such as curling of the coated portion or partial swelling when stacking paper are likely to occur.
To 15 μm, preferably 3 to 10 μm.

FIG. 1 shows an embodiment of the anti-counterfeit paper of the present invention in which a coating layer 1 and a coating layer 2 are formed on the surface of a base paper B. In this case, as the iris pearl pigment of the coating layer 1 and the iris pearl pigment of the coating layer 2, different colors having a hue complementary to each other are used. Note that the complementary color relationship between the iris pearl pigment of the coating layer 1 and the iris pearl pigment of the coating layer 2 is not a strict complementary color relationship, but a combination that approximates the complementary color relationship,
For example, a combination that can be said to have a substantially complementary color relationship such as a hue close to green with respect to a hue close to red is also included.

For example, the coating layer 1 of FIG. 1 uses an iris-colored pearl pigment that looks blue-green under diffusely reflected light and looks red under specularly reflected light, and the coating layer 2 is blue under diffusely reflected light. Considering the case where an iris pearl pigment which looks red with a complementary color to green and looks blue-green under specular light is used, the blue-green color of the coating layer 1 and the red color of the coating layer 2 under diffusely reflected light are considered. This has the effect of enhancing the hue contrast, while the coating layer 1 looks red and the coating layer 2 looks turquoise during observation under specularly reflected light. Will appear to be reversed.

As a coating layer formed on the surface of the base paper B,
As shown in FIG. 1, it is efficient from the viewpoint of manufacturing to form a continuous streak in the flow direction of the base paper. In FIG. 1, the coating layer 1 and the coating layer 2 are formed adjacent to each other as linear streaks having a fixed width. For example, as shown in FIG. Can be formed in parallel at intervals. Further, as shown in FIG. 3, the coating layer 1 (or the coating layer 2) may be formed into a corrugated streak, and a non-coated portion 3 of a character or a pattern such as an alphabet character may be formed therein. .

The method of forming the streak-like coating layer 1 is a method of gravure coating using a gravure roll in which cells such as a lattice type, a diagonal line type, a pyramid type, and a turtle type are cut in a streak shape, and a die coater. To form a stripe-shaped coating layer,
A method of forming a stripe-shaped coating layer using a printing machine,
Any method can be adopted.

Furthermore, the shape of the coating layer can be formed as an arbitrary pattern without being streaked. For example, FIG.
Shows an example in which both the coating layer 1 and the coating layer 2 are formed in a circular shape and are dispersed on the base paper surface. As the design of the coating layer, various shapes such as an ellipse, a square, a rectangle, a star, a hexagon, a heart, a clover, and any character can be selected in addition to a circle.

In the present invention, the anti-counterfeiting effect can be further enhanced by adding an ultraviolet fluorescent substance to one or both of the coating layer 1 and the coating layer 2.
Although the presence of the ultraviolet fluorescent substance cannot be visually recognized under room light or natural light, the ultraviolet fluorescent substance contained in the coating layer 1 and / or the coating layer 2 when the paper is irradiated with ultraviolet light using a black light or the like. This is because they appear to be colored in a specific color.

As the ultraviolet fluorescent substance, any of conventionally known ultraviolet fluorescent dyes and inorganic or organic ultraviolet fluorescent pigments can be used. That is, well-known dyes such as fluorescein, coumarin, oxazole, pyrazoline, thiadiazole, spiropyran, pyrenesulfonic acid, benzimidazole, and diaminostilbene can be used as the ultraviolet fluorescent dye.

Organic ultraviolet fluorescent pigments include resins such as polyvinyl chloride resin, alkyd resin, polymethacrylate resin, urea resin, and melamine resin, as well as fluorescein, eosin, rhodamine 6G, rhodamine B, and basic yellow HG. And the like, which are uniformly dissolved and pulverized.

Specific examples of the inorganic ultraviolet fluorescent pigment include zinc sulfide activated with copper, silver, manganese, etc .; zinc silicate activated with manganese, etc .; zinc sulfide activated with silver, copper, etc. Calcium sulfide activated with cadmium, bismuth, etc .; strontium sulfide activated with samarium, cerium, etc .; calcium tungstate activated with lead, etc .; Sr ₅ (PO ₄ ) ₃ activated with europium, etc.
Cl; Zn ₂ GeO ₂ activated with manganese or the like; Y ₂ O ₂ S activated with europium or the like; Y ₂ O ₃ activated with europium or the like. If necessary, sensitizers such as anthraquinone and acetophenone may be used in combination.

In the present invention, the coating layer 1 or the coating layer 2
By adding an infrared fluorescent substance to one or both of them, the forgery prevention effect can be further enhanced. Although the presence of the infrared fluorescent substance cannot be visually recognized under room light or natural light, when the paper is irradiated with infrared light using an infrared light emitting diode or an infrared laser, the coating layer 1 and / or
Alternatively, the infrared fluorescent substance contained in the coating layer 2 appears to be colored in a specific color.

As the infrared fluorescent substance, any of organic or inorganic infrared fluorescent pigments can be used, and Yb ³⁺ , Er ³⁺ , H
Rare earth phosphors using o ³⁺ as an activator are exemplified. For example, YF ₃ : Yb + Er develops green or red by infrared irradiation, and YF ₃ : Yb + Tm develops blue by infrared irradiation.

In the present invention, the coating layer 1 or the coating layer 2
By adding an infrared absorbing substance to one or both of the above, the forgery prevention effect can be further enhanced. The presence of infrared-absorbing substances cannot be visually recognized under indoor light or natural light, but when infrared light is radiated to the paper using an infrared light-emitting diode or infrared laser, the infrared-absorbing substance contained in the coating layer acts to coat the paper. This is because the working layer 1 and / or the coating layer 2 look black.

Examples of the infrared absorbing material include well-known dyes which selectively absorb infrared rays such as diimonium, aminium, quinone, anthraquinone, polymethine, cyanine, phthalocyanine, triphenylamine, and triazole. Can be used.

Further, in the present invention, the forgery prevention effect can be further enhanced by adding an ultraviolet absorbing substance to one or both of the coating layer 1 and the coating layer 2. Although the presence of the ultraviolet absorbing substance cannot be visually recognized under room light or natural light, when the paper is irradiated with ultraviolet light using a black light or the like, the coating layer 1 and / or the coating layer 1 and / or the ultraviolet absorbing substance contained in the coating layer act. This is because the coating layer 2 looks black. As the ultraviolet absorbing material, salicylic acid,
Any well-known substance such as benzophenone type and benzotriazole type which selectively absorbs ultraviolet rays can be used.

According to the present invention, a forgery-prevention printed matter can be manufactured by printing predetermined items on the above-described forgery-prevention paper. FIG. 5 shows an example in which the anti-counterfeit paper of the present invention is manufactured by using a window-threaded paper, and the surface thereof is subjected to predetermined printing to manufacture a gift certificate.
That is, the window opening 1 formed by thinning the paper layer intermittently.
0, the window-threaded paper, in which the thread 11 embedded in the paper layer is exposed, is coated with the coating layer 1 as shown in FIG.
And the coating layer 2 was formed. According to such a forgery prevention printed matter, the forgery prevention means of embedding the thread 11 in the paper and the forgery prevention means of the present invention of forming the coating layer 1 and the coating layer 2 using the iris pearl pigment are duplicated. Therefore, the forgery prevention effect can be further provided.

[0034]

EXAMPLES The present invention will be specifically described below with reference to examples. Preparation examples of the base paper and the coating liquid used in the examples are as follows.

[Manufacture of base paper] NBKP 20 parts by weight, LB
KP80 parts by weight was added to 350 ml C.I. S. F. 10 parts by weight of clay, 0.3 parts by weight of a paper strength agent (trade name "Polystron 191", manufactured by Arakawa Chemical Industry Co., Ltd.), a sizing agent (trade name "Size Pine E", Arakawa 1.0 part by weight of a chemical industry) and an appropriate amount of a sulfuric acid band were added to prepare a paper stock, and the basis weight was 100 g using a Fourdrinier paper machine by a conventional method.
/ M ² was prepared.

[Preparation of Coating Solution A] A pearl pigment which looks like an iris color near red under diffusely reflected light and a green iris under specularly reflected light (trade name "Iliodin 235", sold by Merck Japan Ltd.) A water-based paint was prepared which was 100 parts by dry weight and 100 parts by weight of an adhesive (“polyvinyl alcohol”, manufactured by Kuraray Co., Ltd.).

[Preparation of Coating Liquid B] A pearl pigment which looks like an iris color near green under diffusely reflected light and a red iris under specularly reflected light (trade name "Iliodin 215", sold by Merck Japan Ltd.) A water-based paint was prepared which was 100 parts by dry weight and 100 parts by dry weight of an adhesive (“polyvinyl alcohol”, manufactured by Kuraray Co., Ltd.).

[Preparation of Coating Liquid C] 100 parts by dry weight of a pearl pigment (trade name “Iliodin 215”) which looks like an iris color close to green under diffusely reflected light and a red iris under specularly reflected light,
Adhesive (“Polyester resin”, manufactured by Toyobo Co., Ltd.) 1
An organic solvent-based paint composed of 50 parts by dry weight of a cyanine infrared absorbing material (trade name “Kayasolve IR750” manufactured by Nippon Kayaku Co., Ltd.) was prepared.

Example 1 Using the coating solution A, a linear streak having a width of 8 mm was applied to the base paper using a gravure coater to form a streak-like coating layer 1 having a thickness of 5 μm. . Next, using a coating liquid B, a gravure coater is used to apply a coating layer 2 having a width of 8 mm and a linear streak having a thickness of 5 μm adjacent to the streak-like coating layer 1 to produce a forgery prevention paper. did. The coating layer 1 and the coating layer 2 of the obtained anti-counterfeit paper are as shown in FIG. 1, and under the irregular reflection light, the coating layer 1 (coating liquid A)
Is seen as an iris color near red, and the coating layer 2 (coating solution B) is visually recognized as an iris color near green, while under regular reflection light, the coating layer 1 (coating solution A) is a green iris color. Coating layer 2 (Coating liquid B)
Became a red iris color, and the hue was reversed and visually recognized.

Next, predetermined items were color-printed on the forgery prevention paper using an offset printing machine. The obtained anti-counterfeit printed matter was copied with an electrophotographic color copier (trade name “Pixel”, manufactured by Canon Inc.), and the coating layer 1 (coating liquid A) was light green in color. The part of the working layer 2 (coating liquid B) was copied in a light red color, but the iris pearl luster was not copied at all, and the difference between the original (real) and the copy was clearly recognized.

Example 2 Using the coating liquid A, a coating layer 1 composed of a circular pattern having a diameter of 10 mm and a thickness of 5 μm was dispersed by a gravure printing machine and printed on the base paper. Then, using the coating liquid C, a diameter of 10 m was obtained with a gravure printing machine.
The coating layer 2 composed of a circular pattern having a thickness of 5 μm and a thickness of 5 μm was dispersed so as not to overlap with the coating layer 1 and printed on the coated paper to produce a forgery prevention paper. The coating layer 1 and the coating layer 2 of the obtained anti-counterfeit paper are as shown in FIG. 4, and under irregularly reflected light, the circle of the coating layer 1 (coating liquid A) has an iris color and a coating color close to red. The circle of the coating layer 2 (coating liquid C) is visually recognized as an iris color close to green, while the circle of the coating layer 1 (coating liquid A) has a green iris color and the coating layer 2 under specular light. The circle of (Coating liquid C) became a red iris color, and the hue was reversed and visually recognized.

Next, predetermined items were color-printed on the anti-counterfeit paper using an offset printing machine. The obtained forgery-prevented printed matter is subjected to a color scanner (trade name “GT-9”).
000 "(manufactured by Epson Corporation) and a color inkjet printer (trade name" Canon BJ-F87 ").
0 "(manufactured by Canon Inc.), the circle of coating layer 1 (coating liquid A) was printed in pale green and the circle of coating layer 2 (coating liquid C) was printed in pale red. However, the iris pearl luster was not printed at all, and the difference between the original (real) and the print was clearly recognized.

The anti-counterfeit printed matter has a wavelength of 880 nm.
m. Irradiation of infrared rays and shooting with a CCD video camera that can also sense infrared rays, and output the image to a CRT. The circle of the coating layer 2 (coating liquid C) is black and clearly distinguished from the real one. did it.

[0044]

As can be seen from the above description,
The anti-counterfeit paper and anti-counterfeit print of the present invention have the following remarkable effects.

1) Even if a forgery is attempted by copying with a color copier or scanning with a color scanner and outputting with a color printer, the pearl luster and hue of the coating layer containing the pearl pigment formed on the paper are not changed. Since it cannot be reproduced, it is possible to immediately determine whether or not it is forged.

2) Since the pearl pigment has a mild color, there is no sense of incompatibility as compared with anti-counterfeit paper using a metallic color brilliant plate.

3) Since a coating layer can be formed on paper by a printing technique, it can be adapted to small lot production.

4) Papermaking fibers can be easily recovered from waste paper.

5) Since two kinds of iris-colored pearl pigments whose hues are complementary to each other are used for the two coating layers, the hue is reversed when observed under specularly reflected light compared to when observed under diffusely reflected light. It is possible to enhance not only the design effect but also the forgery prevention effect.

6) To provide an anti-counterfeit paper and anti-counterfeit printed matter with a further improved anti-counterfeit effect by adding an ultraviolet fluorescent substance, an infrared fluorescent substance, an ultraviolet absorbing substance or an infrared absorbing substance to the coating layer. Can be.

7) Taking advantage of such characteristics, the anti-counterfeit paper of the present invention can be used for check paper, stock paper, bond paper, bill paper, gift certificate paper, passport paper, various ticket papers, boarding tickets, voting paper, etc. It can be used preferably.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a forgery prevention paper of the present invention in which a streaked coating layer 1 and a streaked coating layer 2 are formed adjacent to the surface of a base paper.

FIG. 2 is a plan view showing an embodiment of the anti-counterfeit paper of the present invention in which a stripe-shaped coating layer 1 and a stripe-shaped coating layer 2 are formed at intervals on the surface of a base paper.

FIG. 3 is an explanatory view showing an example of the shape of a coating layer.

FIG. 4 is a plan view showing an embodiment of the forgery prevention paper of the present invention formed by dispersing a circular coating layer 1 and a circular coating layer 2 on the surface of a base paper.

FIG. 5 is a plan view showing an example of a forgery-prevention print of the present invention.

[Explanation of symbols]

1: a coating layer mainly composed of an iris pearl pigment and an adhesive 2: a coating layer mainly composed of an iris pearl pigment having a hue different from that of the coating layer 1 and an adhesive B: base paper

Continuing on the front page (72) Inventor Yuji Matsuda 501 Special Edition Paper Co., Ltd. F-term (reference) 2C005 HA04 HB02 HB10 HB11 HB13 JB12 JB13 JB14 JB17 KA03 KA57 2H113 AA06 BA03 BA05 BB02 BB22 CA36 CA39 CA40 CA46 DA25 DA57 EA07 FA10 4L055 AG94 AH07 AH50 BE08 BE20 FA30 GA45

Claims (7)

[Claims] 1. A coating layer (1) mainly composed of an iris-colored pearl pigment and an adhesive is formed on the surface of a base paper (B), and a base paper in a different place from the coating layer (1) A coating layer (2) mainly composed of an iris-colored pearl pigment and an adhesive different from the hue of the iris-colored pearl pigment used for the coating layer (1),
The forgery prevention paper is characterized in that the hues of these two iris pearl pigments are in a complementary color relationship with each other. 2. The coating layer according to claim 1, wherein the coating layer (1) and the coating layer (2) are formed as streaky coating layers continuous in the flow direction of the base paper. Anti-counterfeit paper. 3. An anti-counterfeit paper according to claim 1, wherein an ultraviolet fluorescent substance is added to the coating layer (1) and / or the coating layer (2). 4. The forgery prevention paper according to claim 1, wherein an infrared fluorescent substance is added to the coating layer (1) and / or the coating layer (2). 5. The anti-counterfeit paper according to claim 1, wherein an infrared absorbing material is added to the coating layer (1) and / or the coating layer (2). 6. The anti-counterfeit paper according to claim 1, wherein an ultraviolet absorbing material is added to the coating layer (1) and / or the coating layer (2). 7. A forgery-prevention printed matter, characterized in that a forgery-prevention sheet according to any one of claims 1 to 6 is provided with a printed layer on which predetermined items are printed.