Anti-counterfeiting printed matter

Abstract

To provide a forgery preventive printed matter having a print region of a fluorescent ink being a security ink difficult to recognize under a usual observation condition, while capable of obtaining a sufficient light emission intensity of the fluorescent ink at ultraviolet irradiation, to achieve a high forgery prevention effect and a lower production cost.SOLUTION: The forgery preventive printed matter includes, at least on one side of a base material: a pattern character printed part that can be visually inspected in an ordinary environment; and an invisible security printed part 13 that cannot be visually inspected in an ordinary environment. The invisible security printed part is formed with thin lines 13R, 13G, and 13B of plural colors of fluorescent inks arranged in prescribed intervals and widths.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a counterfeit prevention printed matter, and more particularly to a counterfeit prevention printed matter provided with printing that is normally invisible. [Background technology]

[0002] In order to increase the security of securities, etc., it is common to use invisible inks that emit light when irradiated with light of a specific wavelength, such as ultraviolet light or infrared light. A common type of invisible ink is fluorescent ink. By using fluorescent ink, it is possible to form a light-emitting part on securities, etc. that appears only when invisible light of a specific wavelength range is irradiated. In addition, by using such a light-emitting part, it is possible to determine whether securities, etc. are genuine or not.

[0003] On the other hand, invisible ink, which is colorless and transparent under normal visible light, can sometimes be seen by the naked eye due to the ink's impregnation and the gloss of the ink or the medium itself. For example, when invisible ink is printed on coated paper by offset printing, the ink does not soak into the paper due to the characteristics of the substrate, and the invisible printed area can be seen due to differences in gloss and unevenness of the printed area.

[0004] As described above, if the security ink printing portion is easy to see, it is undesirable because it makes it easier for counterfeiters to obtain information on materials for counterfeiting. In order to make the security-imparting portion less noticeable, a method of embedding security features inside the substrate as disclosed in Patent Document 1, and a method of making the security features difficult to see by applying a protective film as in Patent Document 2 have been proposed, but there is a problem in that the cost is increased due to the increased number of production steps for the substrate.

[0005] The simplest method is to use printing plates with a negative / positive relationship for the print design and varnish. Patent Document 3 states that by using a halftone dot pattern, it is possible to print the borders of the fluorescent ink printing area in a less noticeable way. However, this causes a problem that the total area of ​​the luminescent printing area becomes smaller, resulting in a lower luminescence intensity. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4517109 [Patent Document 2] Patent No. 4028851 [Patent Document 3] Patent No. 5262961 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the objective of the present invention is to provide an anti-counterfeiting printed matter in which the printed area of ​​fluorescent ink, which is a security ink, is difficult to see under normal observation conditions, the fluorescent ink has sufficient luminescence intensity when exposed to ultraviolet light, and which has a high anti-counterfeiting effect and also reduces manufacturing costs. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides At least one side of the substrate has a picture / text printed portion visible under normal conditions and an invisible security printed portion invisible under normal conditions. A forgery prevention print provided with The invisible security print portion is Thin lines made with red fluorescent ink, thin lines made with green fluorescent ink, and thin lines made with blue fluorescent ink are arranged at a predetermined interval and width, The thin lines of red fluorescent ink, the thin lines of green fluorescent ink, and the thin lines of blue fluorescent ink are repeatedly arranged in a predetermined order, and have a portion where they are arranged in a locally different order. It is an anti-counterfeit printed material.

[0009] In the above-mentioned anti-counterfeiting printed matter, the thin line may be a line extending in a fixed direction within the invisible security printed portion.

[0010] In the above-mentioned anti-counterfeiting printed matter, the invisible security print portion may be a linear pattern, and the thin line may be a line extending in a thickness direction of the linear pattern.

[0013] In the above anti-counterfeit printed matter, the thin lines may be printed by any one of offset printing, gravure printing, and flexographic printing.

[0014] In the above anti-counterfeit printed matter, the fine lines may have a thickness in the range of 0.03 to 0.17 mm.

[0015] In the above anti-counterfeit printed matter, the fine lines may be spaced apart from one another in a range of 0.03 to 0.17 mm.

[0016] In the above anti-counterfeiting printed matter, an overcoat varnish layer having a dot area ratio of 100% to 40% may be provided on the entire upper surface of the picture character printed portion and the invisible security printed portion. Effect of the Invention

[0017] According to the anti-counterfeiting printed matter of the present invention, the invisible security print part is made into a security pattern of a collection of thin lines of fluorescent ink, so that the fluorescent emission intensity can be made the same as that of solid printing. Furthermore, by printing the security pattern as a collection of thin lines of multiple fluorescent inks, when irradiated with ultraviolet light, it appears to be made of a single color of fluorescent ink when viewed with the normal naked eye, but when magnified with a magnifying glass or the like, it can be observed that it is printed with multiple fluorescent inks, such as red (R), green (G), and blue (B), so that a printed matter with a high anti-counterfeiting effect can be obtained. [Brief description of the drawings]

[0018] [Figure 1] 1 is a schematic diagram showing an anti-counterfeit printed matter of the present invention. [Diagram 2]A schematic diagram showing how the anti-counterfeit printed matter in Figure 1 appears when illuminated with a black light. [Diagram 3] Schematic diagram of an enlarged invisible security print area. [Figure 4] FIG. 1 is a schematic diagram showing an example of a security pattern. [Diagram 5] Example 1 of fluorescent ink thin line arrangement [Figure 6] Example 2 of fluorescent ink thin line arrangement [Figure 7] Example 3 of fluorescent ink thin line arrangement [Figure 8] Schematic diagram of an anti-counterfeit printed matter when viewed with the naked eye. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described below. In addition, in the embodiments shown below, technically preferable limitations are imposed for carrying out the invention, but these limitations are not essential requirements for the present invention.

[0020] A schematic diagram of an embodiment of the present invention is shown in Fig. 1. The anti-counterfeiting printed matter 1 is composed of a base material 11, a picture and character printed portion 12, and an invisible security printed portion 13.

[0021] The substrate 11 used in the anti-counterfeiting printed matter 1 of the present invention is one having a smooth and glossy surface, such as coated paper, art paper, thermal paper, or a plastic substrate. A pictorial and text printed section 12 is printed on at least one side of the substrate 11, and this pictorial and text printed section 12 is printed with a picture and warnings according to the intended use of the anti-counterfeiting printed matter 1. The invisible security printed section 13 is an area printed with ink containing a fluorescent pigment that emits fluorescence when irradiated with ultraviolet light, and cannot be seen by the naked eye under normal conditions, but by using a verification device such as an ultraviolet irradiation device, the invisible printed pattern becomes visible due to the emission of fluorescence, making it possible to determine the authenticity of the anti-counterfeiting printed matter 1.

[0022] The pictorial character printing section 12 is provided by a normal printing method such as offset printing, gravure printing, flexographic printing, or inkjet printing and printing with a thermal transfer ribbon, etc. The invisible security printing section 13 is printed by a normal printing method such as offset printing, gravure printing, or flexographic printing.

[0023] Figure 2 is a schematic diagram showing how the anti-counterfeit printed matter 1 of Figure 1 appears when irradiated with a black light 2. The black light 2 is a light that emits ultraviolet rays of so-called UV-A waves (wavelength 315 to 400 nm). When irradiated with the black light 2, the invisible security print part 13 of the anti-counterfeit printed matter 1 emits fluorescence, and a security pattern 13' appears.

[0024] FIG. 3 shows an enlarged view of the invisible security print section 13. When a part 14 of the invisible security print section 13 is enlarged, as shown in the enlarged part 14' and the re-enlarged figure 14'', it is composed of thin lines of red fluorescent ink 13R, green fluorescent ink 13G, and blue fluorescent ink 13B, and these thin lines are arranged at a constant thickness and interval. For the sake of simplicity, only a part of the thin lines is shown. When irradiated with black light 2, the red fluorescent ink 13R emits red light, the green fluorescent ink 13G emits green light, and the blue fluorescent ink 13B emits blue light. It is preferable that the thin lines of each fluorescent ink have a line width in the range of 0.03 to 0.17 mm, and are similarly provided with a space of 0.03 to 0.17 mm.

[0025] When the width of thin lines printed with fluorescent ink is arranged at intervals of 0.17 mm or less, they are recognized as a single line. In general, when a color image in printing is composed of 150 YMC (yellow, magenta, indigo) dots, the individual dots cannot be recognized. Since an interval of 0.17 mm corresponds to approximately 150 lines, by setting the interval at this level, each thin line is not individually visible to the normal eye, and the thin lines appear as a whole as a single block. In addition, when fluorescent ink is printed with a line width, i.e., thickness, of 0.03 mm or less, the fluorescence is weakened, and the effect as security printing is reduced. On the other hand, if the line is made thicker than 0.17 mm, the effect of appearing as a block is weakened as described above, and this is not preferable.

[0026] The shape of the invisible security print 13 is not particularly limited, and may be any shape pattern, such as the linear pattern shown in Fig. 1 or the star pattern 13a in Fig. 4(a). The direction in which the thin lines of fluorescent ink forming the invisible security print 13 extend may be arranged to extend in a fixed direction within the pattern, such as the thin line 23a in the example of Fig. 4(a), but lines extending in partially different directions may also be combined. When the invisible security print 13 is a linear pattern 13b as in the example of Fig. 4(b), the thin lines may be arranged to extend in the line width direction, i.e., thickness direction, of the linear pattern 13b, such as the thin lines 23b, 23c, and 23d.

[0027] The printing arrangement of each color of fluorescent ink is shown in Fig. 3, as well as the red fluorescent ink as shown in Fig. 5. It is also possible to arrange the ink 43R, green fluorescent ink 43G, and blue fluorescent ink 43B in sequence with almost no gaps, as in the fluorescent arrangement 43, and in this case, when the black light 2 is irradiated, the overall appearance appears as a white fluorescent light. When this invisible security print is irradiated with a black light, the security pattern 13' appears to emit light and appear white, as in Figure 2, but when enlarged with a magnifying glass or the like, the colors of the fluorescent light made up of thin lines can be seen separately, which enhances the anti-counterfeiting effect. In addition, if a specific luminous color other than white is desired, the line width of the red fluorescent ink 43R, green fluorescent ink 43G, and blue fluorescent ink 43B can each be appropriately changed to produce a desired luminous color.

[0028] Alternatively, as in the print array 5 shown in FIG. 6, if a fluorescent array 54 having a different arrangement order, in which the green fluorescent ink 54G, the red fluorescent ink 54R, and the blue fluorescent ink 54B are arranged in this order, is provided as part of an arrangement constituted by a fluorescent array 53 in which the red fluorescent ink 53R, the green fluorescent ink 53G, and the blue fluorescent ink 53B are arranged in this order, then white fluorescence can be seen with the normal naked eye as in the example of FIG. 5, but when viewed with a magnifying glass or the like, the different arrangement can be seen, thereby providing a further anti-counterfeiting effect.

[0029] Furthermore, when the substrate 11 of the anti-fogging printed matter 1 is coated paper, it often contains a fluorescent whitening agent to make the paper appear whiter. Therefore, there is no need to print blue fluorescent ink, and as shown in Fig. 7, a fluorescent arrangement 63 may be used in which only red fluorescent ink 63R and green fluorescent ink 63G are printed, and the blue fluorescent portion 63B is not printed, but the effect of the fluorescent whitening agent contained in the substrate 11 is utilized, and the same effect can be obtained.

[0030] 8 is a schematic diagram of the anti-counterfeiting printed matter 7 when viewed with the naked eye under normal conditions, and the invisible security print cannot be seen with the naked eye under normal conditions. By providing an overcoat varnish with a dot area ratio of 100% to 40% on the entire upper surface of the anti-counterfeiting printed matter 7, the step between the invisible security print part 13 and the pictorial character print part 12 or the base material 11 becomes less noticeable, making it even more difficult to see.

[0031] Examples of phosphors to be dispersed in the fluorescent inks of each color include blue phosphors such as perylene, 1,1,4,4-tetraphenyl-1,3 butadiene, and poly(9,9-dialkylfluorene); green phosphors such as coumarin-based dyes, quinacridone-based dyes, poly(p-phenylenevinylene), and poly(fluorene); and red phosphors such as 4-dicyanomethylene-4H-pyran derivatives, 2,3-diphenylfumaronitrile derivatives, and coumarin-based dyes, but are not limited to these.

[0032] According to the present invention, the substrates used for event tickets and the like are often smooth substrates such as coated paper and thermal paper because of the need for design and immediate issuance, but as a counterfeit prevention measure for these printed materials, an invisible security print part, which is a security pattern made of a collection of thin lines printed with fluorescent ink, is provided, which makes it difficult for gloss and unevenness differences to occur, and it is possible to incorporate a counterfeit prevention measure without the general public knowing. In this case, by making the invisible security print part a collection of thin lines printed with fluorescent ink, it is possible to make the invisible security print part difficult to see and to make the fluorescent emission intensity the same as that of solid printing.

[0033] Furthermore, by using fluorescent inks of multiple colors, such as red (R), green (G), and blue (B), for the invisible security printing portion and printing them as a collection of thin lines, the fluorescent printing portion appears to have a uniformly luminous pattern when viewed with the naked eye. However, when the pattern is enlarged with a magnifying glass or the like, it can be seen that it is printed in multiple fluorescent colors, making it a medium with a high level of anti-counterfeiting effect. [Explanation of symbols]

[0034] 1, 7... Anti-counterfeiting printed matter 11...Base material 12...Pictorial and text printing section 13 Invisible security print section 13´·········Security Pattern 13R: Red fluorescent ink 13G Green fluorescent ink 13B: Blue fluorescent ink 14´··········Enlarged section 2. Black Light 4, 5, 6... Printing arrangement 43R, 53R, 63R: Red fluorescent ink 43G, 53G, 63G Green fluorescent ink 43B, 53B...Blue fluorescent ink 63B Blue fluorescent part

Claims

1. A counterfeit prevention printed matter having a pictorial character printed portion visible under normal conditions and an invisible security printed portion invisible under normal conditions on at least one surface of a substrate, The invisible security print portion is a thin line formed with red fluorescent ink, a thin line formed with green fluorescent ink, and a thin line formed with blue fluorescent ink arranged at a predetermined interval and width, the thin lines of red fluorescent ink, the thin lines of green fluorescent ink, and the thin lines of blue fluorescent ink are repeatedly arranged in a predetermined order, and have a portion where they are arranged in a locally different order; Anti-counterfeiting printed matter.

2. 2. The anti-counterfeiting printed matter according to claim 1, wherein the thin line is a line extending in a fixed direction within the invisible security printed portion.

3. 2. The anti-counterfeiting printed matter according to claim 1, wherein the invisible security print portion is a linear pattern, and the thin line is a line extending in a thickness direction of the linear pattern.

4. 4. The anti-counterfeiting printed matter according to claim 1, wherein the thin lines are printed by any one of offset printing, gravure printing, and flexographic printing.

5. 5. The anti-counterfeiting print according to claim 1, wherein the fine lines have a thickness in the range of 0.03 to 0.17 mm.

6. 6. The anti-counterfeiting print according to claim 1, wherein the fine lines are spaced apart from one another at intervals ranging from 0.03 to 0.17 mm.

7. 7. The anti-counterfeiting printed matter according to claim 1, wherein an overcoat varnish layer having a dot area ratio of 100% to 40% is provided on the entire upper surface of the picture character printing area and the invisible security printing area.

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