JP5050287B2 - Anti-counterfeit printed matter - Google Patents

Description

  The present invention relates to a printed matter that is required to prevent counterfeiting or duplication of banknotes, stock certificates, securities such as bonds, various certificates, and important documents.

  In printed matter that requires prevention of counterfeiting, it is important to easily determine whether the forgery is found or not. As a method for easily determining authenticity, there is a technique in which an invisible image becomes a visible image. As a typical anti-counterfeiting technique that applies some kind of processing to the printed matter to make the invisible image appear as a visible image, the latent image intaglio and graphics that do not reproduce colors normally on a copying machine called copy prevention image line, functionality There are inks using materials. Among these, as inks using functional materials, there is a technology that uses functional materials that are excited by applying specific light or electron beam or applying specific stress, such as fluorescent inks and phosphorescent inks, for printing inks.

  As a typical enforcement method using a particularly simple tool, for example, an arbitrary figure is printed with a colorless transparent ink containing a fluorescent pigment (hereinafter referred to as “colorless fluorescent ink”), and ultraviolet light is applied to the printed matter with an ultraviolet lamp or the like. Is effective in that a figure printed with colorless fluorescent ink emits light with visible light. Colored fluorescent inks can be made visible images under normal visible light when printed on colorless fluorescent inks, and authenticity is determined by emitting the image when irradiated with a predetermined wavelength such as ultraviolet rays. It is possible.

  An example of anti-counterfeiting measures using fluorescent ink will be described. FIG. 1 is a perspective view showing a state in which the printed matter 1 is visually observed from a viewpoint 9 while irradiating ultraviolet rays using an ultraviolet lamp 8, and FIG. 2 shows a state observed with normal visible light. It is explanatory drawing by which the state observed by irradiating the ultraviolet ray of the ultraviolet lamp 8 was shown. On the printed matter 1 shown in FIG. 1, a printed pattern 5 made up of arbitrary figures and characters and a pattern 20 made up of arbitrary figures and characters printed with colorless fluorescent ink are printed. In normal observation with visible light, as shown in FIG. 2A, only the printed pattern 6 is visible, and the printed pattern 6 printed with colorless fluorescent ink is colorless to the naked eye. Not visible. In FIG. 2A, the pattern 4 is displayed with a dotted line for easy understanding.

  FIG. 2B shows a state when the printed matter 1 is irradiated with ultraviolet rays using an ultraviolet lamp 8. As shown in FIG. 2B, when the fluorescent ink is excited and emits light by ultraviolet rays, the printed pattern 6 provided as an invisible image becomes a visible image. By emitting light as a visible image, it becomes obvious at a glance that the image is genuine. Here, what is important as a measure for preventing counterfeiting of fluorescent ink is confidentiality by using a dedicated functional material. For example, forgery itself can be suppressed by using a functional material that cannot be easily obtained. Such anti-counterfeiting technology using functional materials has been used for a long time. For example, in other countries, an ultraviolet lamp is installed under the counter of a store, and when a bill is received, fluorescent light emission is confirmed. Then, there is a method of determining authenticity. Such a technique is easy to determine authenticity and is said to have a check-in effect on crimes, and is a desirable authentication technique in the future.

  In this way, the phenomenon that light is emitted in some color by ultraviolet irradiation is a clear effect as a method for confirming the forgery prevention effect. However, because of this clarity, alternatives with similar effects are readily available nowadays, using alternatives that have similar effects due to systematic counterfeiting, while using dedicated materials. May be forged. That is, there is a problem in that it is not a sufficient anti-counterfeit measure simply by irradiating ultraviolet light to emit an image.

  As a method for enhancing the forgery prevention measures using fluorescent ink to solve the above problems, a method using fluorescent ink called dichroic fluorescence has been proposed. The dichroic fluorescence is excited by different colors by irradiating one print image line with ultraviolet rays of two different wavelengths. For example, the color developed by ultraviolet light having a wavelength of 365 nm is green, and the color developed by ultraviolet light having a wavelength of 254 nm is red. According to this technology, it has two colors. In addition, since a highly confidential functional material is used, the anti-counterfeiting effect is further improved, but an apparatus that can irradiate ultraviolet rays of two types of wavelengths is necessary to achieve proper authenticity determination. In addition to the special functional material, there is a problem that the cost is high because a special authenticity determination device is required.

  The inventors of the present application have proposed a method in which one type of fluorescent ink is used and an invisible image different from the color forming effect is provided while one type of excitation color is generated. A basic image is provided on the substrate 1, and the basic image is composed of a latent image portion and a latent image peripheral portion, and the latent image portion and the latent image peripheral portion cannot be distinguished with the naked eye and are continuously arranged at a constant cycle. The halftone dots of the latent image portion are different in resolution from the halftone dots in the peripheral portion of the latent image, have the same halftone dot area ratio per unit area, and have a halftone dot perimeter per unit area ( Contour length) is different, and the latent image portion and the latent image peripheral portion are printed with colored fluorescent ink. Thereby, when an infrared ray is irradiated to the printed image line by the colored fluorescent ink, the invisible image becomes a visible image. However, in order to manage the image line size on the printed matter, it is premised that the color fluorescent ink, that is, a color that can be visually recognized with visible light, is printed (see, for example, Patent Document 1).

  On the other hand, as a useful method that enables authenticity determination at a low cost without using fluorescent ink, there is a technique in which a discrimination tool is stacked on a printed material. In other words, an invisible image is expressed as a visible image by overlaying a discriminating tool on a printed material on which an invisible image is applied. The main form of the discriminating tool is a transparent sheet printed with a parallel line screen (hereinafter referred to as “ten thousand”). Line filters ”) or lenticular lenses. There are mainly two types of techniques for expressing an invisible image using this discriminator, and there are point phase modulation and line phase modulation.

  As an example of dot phase modulation (Dot phase modulation), a printed material on which a phase-modulated pattern is formed in a first direction and a second direction, a first direction of the printed material, and a line of a line filter A first multi-tone image formed by superimposing the line filters so as to match the direction of the line pattern, and an angle of overlapping the line filters in the second direction of the printed matter There is a printed matter on which a second multi-tone image is formed and an image forming method when they are changed so as to match (for example, see Patent Document 2).

  In addition, as an example of dot phase modulation, each dot constituting a dot pattern in which an image appears by overlapping a lens array (fly eye lens, honeycomb lens, lenticular lens, etc.) on a base material. However, in a printed matter composed of at least two types of screen lines and at least two types of screen angle halftone dots, the dot area ratio of each dot constituting the dot pattern is the same if it is genuine. Therefore, an invisible image appears by overlapping the lens array, and in the case of a copy, the dots that are reproduced with the size of the screen lines or the dot angle are crushed and the dot density changes. There is a printed matter in which an image different from the invisible image appears (for example, see Patent Document 3).

  In addition, the applicants of the present application have filed patent applications relating to printed materials using dot phase modulation. This is a latent image printed matter in which a plurality of pixels of the same color are regularly arranged on a substrate to form two latent image patterns, and the phases of the plurality of pixels are shifted in a first direction. A first latent image pattern (invisible image) formed by the first region arranged in this manner, and a second latent image pattern (invisible image) formed by the second region printed with functional ink (for example, , See Patent Document 4).

  As an example of line phase modulation, the line phase is shifted by a half pitch with respect to the line pattern having the line part and the non-line part on the base material and having the same pitch and width. A plurality of types of latent image line patterns each having a latent image portion formed in this manner are printed matter having latent images printed by being superimposed at different angles, and the plurality of types of latent image line patterns are There are prints each having a different color, and a latent image portion that is visualized by superimposing a film having the same pitch as the line pattern of the print on the plurality of invisible images (for example, , See Patent Document 5).

JP 2001-62385 A Japanese Patent No. 4132122 Japanese Patent No. 4013450 JP 2008-207335 A JP 2004-174997 A

  The conventional printed matter described above is premised on being printed with a visible colored ink or colored fluorescent ink. Therefore, when high-resolution input is performed with an optical scanner, it is possible to image the shape and arrangement of figures as they are, and functional materials can also be fabricated with alternatives. In the systematic forgery that possesses advanced plate-making and printing equipment, it could not be completely prevented.

  In view of the above circumstances, the present invention allows the first invisible image to be expressed as the first visible image in the first discriminating tool and the first discriminating tool in the second discriminating tool. It is an object of the present invention to provide a forgery-preventing printed matter in which a second invisible image and a third invisible image embedded in the visible image are expressed as the second visible image and the third visible image. .

  The printed matter for preventing forgery of the present invention includes a first image line and a second image line that are disposed on at least a part of a base material with a colorless, transparent, or light-colored material having a function so as to face the center. And a third image line and a fourth image line arranged with a colorless and transparent or light-colored material having functionality so as to face the center along the second direction orthogonal to the first direction. Are arranged in a matrix at a constant pitch, and the first and second lines in each line element are in an on / off relationship, and The positive image or negative image of the first invisible image is formed by the first image line, and the negative image or positive image of the first invisible image is formed by the second image line. The third image line and the fourth image line in the image line element are in an on / off relationship, In addition, the area is the same, the positive image or negative image of the second invisible image is formed by the third image line, and the negative image or positive image of the second invisible image is formed by the fourth image line. It is a printed matter for preventing forgery.

  The image element of the forgery-preventing printed matter of the present invention is characterized in that it is a forgery-preventing printed matter having a square shape and a side length of 1 mm or less.

  In addition, the pixel element of the forgery-preventing printed material according to the present invention has a colorless transparent or functional or functional area in a region where the first image line, the second image line, the third image line, and the fourth image line do not exist. A counterfeit having a fifth image line and / or a sixth image line arranged by a light-colored material, and a third invisible image formed by the fifth image line and / or the sixth image line. It is a printed matter for prevention.

  In addition, the third invisible image in the forgery-preventing printed material according to the present invention forms an invisible image having a continuous tone by arbitrarily setting the shape of the fifth image line and / or the sixth image line. It is characterized by being a forgery-proof printed matter.

  The colorless and transparent or light-colored material having functionality in the anti-counterfeit printed matter of the present invention is a non-counterfeit printed matter of colorless and transparent ink containing a material that develops color in the visible light region upon irradiation with energy rays. Yes.

  The base material of the anti-counterfeit printed matter according to the present invention is a forgery-preventing printed matter on which at least one visible image is formed.

  In addition, the visible image of the anti-counterfeit printed matter of the present invention is printed with ink containing a glittering material, and the first image line and the second image line are arranged at a position overlapping at least a part of the image line of the visible image. , A third image line, a fourth image line, a fifth image line, and a sixth image line, thereby providing a forgery prevention printed matter on which a fourth invisible image is formed.

  According to the forgery-preventing printed matter of the present invention, the first invisible image is formed on the first discriminating tool by the two kinds of discriminating tools in the pattern printed on the base material with a colorless and transparent material having functionality. In addition to being expressed as the first visible image, the second invisible image and the third invisible image embedded in the first visible image are respectively displayed in the second discriminator by the second visible image. An anti-counterfeit printed matter expressed as an image and a third visible image is provided.

  The anti-counterfeit printed matter of the present invention makes it possible to determine the authenticity of a pattern printed on a base material with a colorless and transparent material having functionality by using at least two types of discriminating tools. As the true / false discrimination method, there are a method using only the first discriminator or a method using both the first discriminator and the second discriminator. By using the latter method, higher authenticity can be obtained. It is possible to provide false discrimination. Hereinafter, forgery prevention printed matter according to Embodiments 1 to 3 of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the first to third embodiments described below, and includes various other embodiments within the scope of the technical idea described in the claims. It is.

  The anti-counterfeit printed matter according to Embodiments 1 to 3 of the present invention enhances authenticity discrimination by at least two types of discrimination tools. FIG. 3 is an explanatory diagram showing a state observed with normal visible light and a state observed by irradiating with ultraviolet rays from a first discriminator, for example, an ultraviolet lamp 8.

  When the printed matter 1 shown in FIG. 3 (a) is observed with ordinary visible light, as shown in FIG. 3 (a), only the printed pattern 5 is visible, and a colorless and transparent material having functionality. For example, the printed pattern 3 printed with colorless fluorescent ink is not visually recognized because it is colorless to the naked eye. In FIG. 3A, the printed pattern 3 is displayed with a dotted line for easy understanding.

  When the printed matter 1 shown in FIG. 3A is irradiated with ultraviolet rays on the printed matter 1 using the ultraviolet lamp 8 which is the first discriminating tool at the viewpoint 9, as shown in FIG. As shown in (b), when the fluorescent ink is excited and emits light by ultraviolet rays, the printed pattern 3 provided as the first invisible image becomes the first visible image.

  In the present invention, as shown in FIG. 4, the printed matter 1 is irradiated with ultraviolet rays by an ultraviolet lamp 8 as a first discriminating tool, and the lenticular lens 2 as a second discriminating tool is superimposed. Thus, an invisible image can be easily expressed to determine authenticity. The lenticular lens 2 is a transparent material, and sufficiently transmits ultraviolet light with the ultraviolet lamp 8 which is the first discriminating tool.

  Then, when the lenticular lens 2 as the second discriminating tool is superimposed on the printed matter 1 with a predetermined angle (this is assumed to be 0 degree), it is shown in FIG. 5 (a) or FIG. 5 (b). Such a second invisible image 6 appears as a visible image. Further, when the lenticular lens 2 as the second discriminating tool is superimposed on the printed material 1 at an angle of 90 degrees with respect to a predetermined angle, as shown in FIG. 6A or 6B. The third invisible image 6 ′ appears as a visible image. As shown in FIG. 5 (a) or FIG. 5 (b) and FIG. 6 (a) or FIG. 6 (b), what appears to be negative-positive is relative between the lenticular lens 2 and the printed material 1. This is caused by the position and is within the scope of the effect of the present invention.

  Furthermore, Embodiments 1 to 3 of the present invention are described as examples using colorless fluorescent ink. However, as a light-colored ink, a fluorescent ink containing a high brightness colored pigment or a state of low pigment content is used. Even a fluorescent ink containing a certain colored pigment (hereinafter referred to as “colored fluorescent ink”) is within the scope of the effect of the present invention. That is, the colored fluorescent ink used when the lenticular lens 2 as the second discriminating device is overlaid in the normal visual state where the ultraviolet lamp 8 as the first discriminating tool is not irradiated with ultraviolet rays, When the invisible image 6 and the invisible image 6 ′ are so bright that they cannot be visually recognized as a visible image, the effect of the present invention is not impaired even with colored fluorescent ink. In addition, the light-colored material in this invention is these high brightness colored fluorescent inks.

(1) Embodiment 1
A forgery prevention printed matter according to Embodiment 1 of the present invention will be described.
FIG. 7 is an explanatory diagram showing a state observed with normal visible light and a state observed by irradiating with ultraviolet rays from an ultraviolet lamp 8 as a first discriminating tool.

  The printed matter 1 shown in FIG. 7A is a print in which only the printed pattern 5 is visually recognized and printed with colorless fluorescent ink, as shown in FIG. The pattern 3 is not visually recognized because it is colorless to the naked eye. In FIG. 3A, the printed pattern 3 is displayed with a dotted line for easy understanding.

  When the printed matter 1 shown in FIG. 7A is irradiated with ultraviolet rays on the printed matter 1 using the ultraviolet lamp 8 as the first discriminating tool at the viewpoint 9 as shown in FIG. As shown in (b), when the fluorescent ink is excited and emits light by ultraviolet rays, the printed pattern 3 provided as the first invisible image becomes the first visible image. Further, in FIG. 7B, in addition to the pattern 4, a pattern 10 composed of arbitrary figures and characters can be applied. For example, the pattern 4 and the pattern 10 shown in FIG. 7 are arranged so as to overlap each other, and the present invention is not limited to this, and various design expressions can be applied.

  FIG. 8 shows a partially enlarged configuration of one stroke of the printed pattern 3 with respect to the printed matter 1 in the first embodiment. However, since colorless fluorescent ink is used, it is colorless and transparent under visible light. In the following description, it is assumed that a figure is visible.

  The vertical and horizontal dimensions S are, for example, 1 mm or less, such as 340 μm. Such an image line group is a minimum unit called a unit, and is regularly arranged in a matrix on the surface of the printed matter. As shown in FIG. 8A, the image lines A, image lines A ′, image lines B, image lines B ′, image lines C, and image lines D are arranged with a predetermined positional relationship. Is done. The image line A and the image line A ′ shown in FIG. 8B form a pair and are in an on / off relationship with each other. The image line A and the image line A ′ have the same area. Due to the presence of the image line A and the image line A ′, the image is not visually recognized under normal visible conditions, and the second invisible image (negative or positive) is formed only by the image line A, and only the image line A ′ is the first image. Two invisible images (positive or negative) are respectively formed.

  Similarly, the image line B and the image line B ′ are turned on and off in pairs and have the same area. A third invisible image (negative or positive) is formed only by the image line B, and a third invisible image (positive or negative) is formed only by the image line B ′.

  The drawing line C shown in FIG. 8D becomes a drawing line constituting the pattern 4 made up of arbitrary figures and characters as shown in FIG. 7B, and the drawing line C is formed at the four corners of the rectangle. Each quarter is arranged so that the center comes. Further, the image line D shown in FIG. 8 (e) becomes the image line constituting the pattern 10 made up of arbitrary figures and characters as shown in FIG. 7 (b), and the image line D is centered on the rectangle. Are arranged so that their centers coincide.

  When the image lines having such a configuration are arranged continuously and regularly on the printed matter without any gaps in a matrix, the result is as shown in FIG. FIG. 9 shows the image lines A and A ′ forming the second invisible image, the image lines A ′, and the image lines A ′ forming the second invisible image in the plurality of image lines arranged in a matrix that forms the printed pattern 3 printed on the printed matter 1. Schematic diagram schematically showing the lines B and B ′ constituting the invisible image, the line C constituting the pattern 4, and the line D constituting the pattern 10 so as to be understood. It is. FIG. 9A and FIG. 9B are the same printed matter, and are simply shown by thick solid lines so that the second invisible image and the third invisible image can be seen from the respective positional configurations. FIG. 9A shows the position of the second invisible image “A”, and FIG. 9B shows the position of the third invisible image “B”.

  FIG. 10A shows a state in which the printed pattern 3 of the printed matter 1 shown in FIG. 9 is observed with normal visible light. The image line A, the image line A ′, the image line B, the image line B ′, The image line C and the image line D are not visually recognized. In the first embodiment, the printed pattern 3 is printed on the coated paper by offset printing. However, the printing method, the printing apparatus, and the like are not limited at all.

  In normal visual inspection, no pattern can be recognized as shown in FIG. 10A, but when the printed pattern 3 is irradiated with ultraviolet rays by the ultraviolet lamp 8 which is the first discrimination tool, As shown in FIG. 10 (b), the colorless and transparent inks are used to excite the lines A, A ', B, B', C and D, which were colorless and transparent, by ultraviolet rays. Emits light. In this state, the pattern 4 constituted by the image line C and the pattern 10 constituted by the image line D are visually recognized as if they were the design of the printed pattern 3. That is, the printed pattern 3 shown in FIG. 7B is visually recognized as a first visible image.

  Furthermore, as shown in FIG. 11, for example, the lenticular lens 2 as the second discriminating tool is superimposed on the printed pattern 3 on the printed matter 1 and visually observed from the front, thereby being applied to the printed pattern 3. The second invisible image and the third invisible image can be expressed as visible images, respectively.

  In a state where the lenticular lens 2 as the second discriminating tool is not overlapped, the pattern 4 and the pattern 10 are visually recognized by excitation light emission, but the second invisible image and the third invisible image are not visually recognized. When the lenticular lens 2 is superposed on a predetermined position on the printed pattern 3, the patterns 4 and 10 that have been viewed until then, that is, the first visible image cannot be confirmed at all. Each of the invisible image or the third invisible image is visually recognized as a visible image. The principle of the image switching effect in the printed matter according to the first embodiment will be described below.

  FIG. 12 shows a state in which the printed pattern 3 excited and emitted by irradiating ultraviolet rays with the ultraviolet lamp 8 as the first discriminating tool is visually observed from the front. FIG. 12A shows that the center line 7 of each lens of the lenticular lens 2 as the second discriminating tool matches the line L1 in FIG. 8 with respect to the printed pattern 3 excited and emitted by irradiation with ultraviolet rays. The state where the lenticular lens 2 is superimposed on the printed pattern 3 on the printed matter 1 is shown. When the center line 7 of the lenticular lens 2 is located at the position shown in FIG. 12A, the image line A and the image lines B and B 'are positioned on the center line 7. Due to the characteristics of the lenticular lens, the image line A located at the center line 7 and the image lines B and B ′ appear to expand, so that a visible image by excitation light emission as shown in FIG. To do. Here, since the image lines B and B ′ are in a negative-positive relationship and have the same area, an image formed by them is not visually recognized. For this reason, only the second invisible image formed by the image line A is visually recognized. Further, when the center line 7 of the lenticular lens is located at a position corresponding to the line L2 in FIG. 8, the image line A 'appears to expand. As a result, the second invisible image appears as a visible image in any of the negative and positive states.

  FIG. 13 shows a state in which the printed pattern 3 excited and emitted by irradiating ultraviolet rays with the ultraviolet lamp 8 as the first discriminating tool is visually observed from the front. FIG. 13A shows that the center line 7 of each lens of the lenticular lens 2 as the second discriminating tool coincides with the line L3 in FIG. 8 with respect to the printed pattern 3 excited and emitted by irradiation with ultraviolet rays. 1 shows a state in which a lenticular lens 2 composed of a lenticular lens is superposed on a printed pattern 3 on a printed matter 1. When the center line 7 of the lenticular lens 2 is at the position shown in FIG. 13A, the image line B and the image lines A and A ′ are positioned on the center line 7. Due to the characteristics of the lenticular lens, the image lines B, A, and A ′ located at the center line 7 appear to expand, so that a visible image by excitation light emission as shown in FIG. Here, since the image lines A and A ′ are in a negative-positive relationship and have the same area, the image formed by them is not visually recognized. For this reason, only the third invisible image formed by the image line B is visually recognized. Further, when the center line 7 of the lenticular lens is located at a position corresponding to the line L4 in FIG. 8, the image line B 'appears to expand. As a result, the third invisible image appears as a visible image in any of the negative and positive states.

  In the first embodiment, a lenticular lens is used as the second discriminating tool, but the material is not limited as long as the material can transmit ultraviolet rays. For example, the same effect can be obtained even with a line filter. At the time of observation with the lenticular lens, the image line C is hardly visually recognized, and thus the visibility when the second invisible image and the third invisible image are expressed as visible images is not hindered.

  Further, the image line of the printed pattern 3 of the printed matter 1 in the first embodiment is not limited to the circular or elliptical shape as shown in FIG. The image line A and the image line A ′ have the same area, and the image line B and the image line B ′ also have the same area. As long as it has such a configuration, the shape of each drawing line is not limited.

(2) Embodiment 2
In the second embodiment, as in the first embodiment, as shown in FIG. 4, an invisible image is easily expressed on the printed matter 1 by combining the first and second discriminating tools. It is possible to discriminate falseness. FIG. 14 is an explanatory diagram showing a state observed with normal visible light and a state observed by irradiating with ultraviolet rays from the ultraviolet lamp 8 as the first discriminating tool.

  The printed matter 1 shown in FIG. 14 (a) is a print printed with colorless fluorescent ink, as shown in FIG. 14 (a), when viewed with ordinary visible light, only the printed pattern 5 is visible. The pattern 3 is not visually recognized because it is colorless to the naked eye. In FIG. 14A, the printed pattern 3 is displayed with a dotted line for easy understanding.

  When the printed matter 1 shown in FIG. 14A is irradiated with ultraviolet rays using the ultraviolet lamp 8 as the first discriminating tool at the viewpoint 9, as shown in FIG. As shown in (b), when the fluorescent ink is excited and emits light by ultraviolet rays, the printed pattern 3 provided as the first invisible image becomes the first visible image. This first visible image has a continuous gradation, and as shown in FIG. 14B, a pattern 11 (for example, a face photograph) having an arbitrary continuous gradation is visually recognized.

  FIG. 15 shows a partially enlarged configuration of one stroke of the printed pattern 3 with respect to the printed matter 1 in the second embodiment. However, since colorless fluorescent ink is used, it is colorless and transparent under visible light. In the following description, it is assumed that a figure is visible.

  The vertical and horizontal dimensions S are, for example, 1 mm or less, such as 423 μm. Such an image line is a minimum unit called a unit, and is regularly arranged in a matrix on the surface of the printed matter. Each drawing line includes at least three drawing line elements. The image line A and the image line A ′ are paired and are in an on / off relationship with each other. The image line A and the image line A ′ have the same area. Due to the presence of the image line A and the image line A ′, the image is not visually recognized under normal visible conditions. The second invisible image (negative or positive) is formed only by the image line A, and the second image is displayed only by the image line A ′. Invisible images (positive or negative) are respectively formed.

  Similarly, the image line B and the image line B ′ are turned on and off in pairs and have the same area. A third invisible image (negative or positive) is formed only by the image line B, and a third invisible image (positive or negative) is formed only by the image line B ′.

  The image line D ′ is an element constituting a visible image, and constitutes a pattern 4 composed of an arbitrary continuous tone visually recognized with the naked eye in a normal viewing state. The image line D ′ is arranged between the image line A and the image line A ′ and the image line B and the image line B ′. The image line D ′ shown in FIG. 15 indicates the maximum area, and within this area, the image line D ′ is a set of random dots such as an FM screen in addition to normal printing halftone dots. The shape is not limited at all.

  When the image lines having such a configuration are arranged continuously and regularly on the printed matter without any gaps in a matrix, the result is as shown in FIG. FIG. 16 shows the line A and the line A ′ constituting the second invisible image and the third line in the plurality of lines arranged in a matrix constituting the printed pattern 3 printed on the printed matter 1. FIG. 4 is a schematic diagram simply showing the configurations of an image line B and an image line B ′ forming an invisible image and an image line D ′ forming a pattern 11. FIG. 16A and FIG. 16B are the same printed matter, and are schematic diagrams simply shown by thick solid lines so that the invisible image and its position configuration can be seen. Represents the position of the second invisible image “A”, and FIG. 16B represents the position of the third invisible image “B”.

  FIG. 17A shows a state in which the printed pattern 3 of the printed matter 1 shown in FIG. 16 is observed with normal visible light. The image line A, the image line A ′, the image line B, the image line B ′, and The drawing line D ′ is not visually recognized by the naked eye. In the second embodiment, the length S is 423 μm, and the printed pattern 3 is printed on the coated paper by offset printing. However, the length S, the substrate of the printed material, the printing method, the printing material, the printing apparatus, and the like are not limited at all.

  With normal visual inspection, no pattern can be recognized as shown in FIG. 17A. However, when the ultraviolet ray 8 serving as the first discriminator is irradiated with ultraviolet rays on the printed pattern 3, As shown in FIG. 17 (b), the colorless and transparent inks cause the lines A, A ', B, B' and D ', which were colorless and transparent until then, to be excited and emitted by ultraviolet rays. . In this state, the pattern 11 constituted by the image line D ′ is visually recognized as if it is the design of the printed pattern 3. That is, the printed pattern 3 shown in FIG. 14B is visually recognized as a first visible image.

  Furthermore, as shown in FIG. 11, for example, the lenticular lens 2 as the second discriminating tool is superimposed on the printed pattern 3 on the printed matter 1 and visually observed from the front, thereby being applied to the printed pattern 3. The second invisible image and the third invisible image can be expressed as visible images, respectively.

  In a state where the lenticular lens 2 as the second discriminating tool is not overlapped, the pattern 4 and the pattern 11 are visually recognized by excitation light emission, but the second invisible image and the third invisible image are not visually recognized. When the lenticular lens 2 is superposed on a predetermined position on the printed pattern 3, the pattern 11 that has been viewed until then, that is, the first visible image cannot be confirmed at all, and conversely, the second invisible image or Each of the third invisible images becomes visible as a visible image. The principle of the image switching effect in the printed matter according to the first embodiment will be described below.

  FIG. 18 shows a state in which the printed pattern 3 excited and emitted by irradiating ultraviolet rays with the ultraviolet lamp 8 as the first discriminating tool is visually observed from the front. FIG. 18A shows that the center line 7 of each lens of the lenticular lens 2 as the second discriminating tool matches the line L1 in FIG. 15 with respect to the printed pattern 3 excited and emitted by irradiation with ultraviolet rays. 1 shows a state in which a lenticular lens 2 composed of a lenticular lens is superposed on a printed pattern 3 on a printed matter 1. When the center line 7 of the lenticular lens 2 is located at the position shown in FIG. 18A, the image line A and the image lines B and B 'are positioned on the center line 7. Due to the characteristics of the lenticular lens, the image line A positioned at the center line 7 and the image lines B and B ′ appear to expand, so that a visual image by excitation light emission as shown in FIG. To express. Here, since the image lines B and B ′ are in a negative-positive relationship and have the same area, an image formed by them is not visually recognized. For this reason, only the second invisible image formed by the image line A is visually recognized. Further, when the center line 7 of the lenticular lens is located at a position corresponding to the line L2 in FIG. 8, the image line A 'appears to expand. As a result, the second invisible image appears as a visible image in any of the negative and positive states.

  FIG. 19 shows a state in which the printed pattern 3 excited and emitted by irradiating ultraviolet rays with the ultraviolet lamp 8 as the first discriminator is visually observed from the front. FIG. 19A shows that the center line 7 of each lens of the lenticular lens 2 as the second discriminating tool matches the line L3 in FIG. 15 with respect to the printed pattern 3 excited and emitted by irradiation with ultraviolet rays. 1 shows a state in which a lenticular lens 2 composed of a lenticular lens is superposed on a printed pattern 3 on a printed matter 1. When the center line 7 of the lenticular lens 2 is at the position shown in FIG. 19A, the image line B and the image lines A and A ′ are positioned on the center line 7. Due to the characteristics of the lenticular lens, the image line B located at the center line 7 and the image lines A and A ′ appear to expand, so that a visual image by excitation light emission as shown in FIG. To do. Here, since the image lines A and A ′ are in a negative-positive relationship and have the same area, an image formed by them is not visually recognized. For this reason, only the third invisible image formed by the image line B is visually recognized. Further, when the center line 7 of the lenticular lens is at a position corresponding to the line L4 in FIG. 15, the image line B 'appears to expand. As a result, the third invisible image appears as a visible image in any of the negative and positive states.

  In the second embodiment, a lenticular lens is used as the second discriminating tool, but the material is not limited as long as the material can transmit ultraviolet rays. For example, the same effect can be obtained even with a line filter. At the time of observation with the lenticular lens, the image line D ′ is hardly visually recognized, so that the visibility when the second invisible image and the third invisible image appear as visible images is not hindered.

  Further, the image line of the printed pattern 3 of the printed matter 1 in the second embodiment is not limited to the quadrangular shape as shown in FIG. The image line A and the image line A ′ have the same area, and the image line B and the image line B ′ also have the same area. As long as it has such a configuration, the shape of each drawing line is not limited.

(3) Embodiment 3
In the third embodiment, as in the first and second embodiments, the first invisible image that can be visually recognized using the ultraviolet lamp 8 that is the first discriminating tool, and the second, the lenticular lens that is the second discriminating tool. In addition to the second invisible image and / or the third invisible image that can be visually recognized using 2, an example in which a fourth invisible image that can be visually recognized without using a discriminator is given will be described. Note that the fourth invisible image includes a design shared with the first invisible image.

  In the third embodiment, the basic image line configuration for playing the first invisible image, the second invisible image, and the third invisible image is the arrangement of the image lines shown in FIG. 8 or FIG. The image line A, the image line B, the image line A ′, the image line B ′, the image line C, and the image line D (or the image line D ′) use colorless fluorescent ink. On the other hand, the line that plays the fourth invisible image is a set of the line A, the line B, the line C, the line A ′, the line B ′, the line C ′, the line D, or the line D ′. It is a pattern.

  FIG. 20 shows the drawing line configuration of the third embodiment. A printed pattern 12 printed with ink containing a glittering material, for example, silver ink having a metallic luster, is formed on the printed material 1, and a pattern 13 composed of arbitrary figures and characters is formed in the printed pattern 12. Yes. In the third embodiment, the line area ratio of the pattern 13 is 75% to 100%, and the line area ratio of the other printed pattern 12 is 25% to 50%. However, the glitter material and the line area ratio are No limitation.

  In the third embodiment, the design of “sakura” is formed. A printed pattern 14 made of colorless fluorescent ink is printed on the printed pattern 13. The printed pattern 14 is composed of an image line A, an image line B, an image line A ′, an image line B ′, an image line C, and an image line D (or an image line D ′). The arrangement of the image line A, the image line B, the image line A ′, the image line B ′, the image line C, and the image line D (or the image line D ′) is the same as in the first and second embodiments. In the third embodiment, the printed pattern 14 constitutes a design of “ume”, for example. Note that the glittering material and the colorless fluorescent ink in Embodiment 3 are not limited in any way.

  When the printed matter 1 shown in FIG. 20 is observed with ordinary visible light, as shown in FIG. 20, only the pattern 13 in the printed pattern 12 is visually recognized, and the printed pattern 14 printed with colorless fluorescent ink is used. Is not visible because it is colorless to the naked eye. In FIG. 20, the printed pattern 14 is displayed with a dotted line for easy understanding.

  When the printed matter 1 shown in FIG. 20 is irradiated with ultraviolet rays using the ultraviolet lamp 8 as the first discriminating tool at the viewpoint 9 as shown in FIG. 1, as shown in FIG. When the fluorescent ink is excited and emits light by the ultraviolet rays, the printed pattern 14 provided as the first invisible image becomes the first visible image. Thereby, the design of “ume” formed by the printed pattern 14 is excited and emits light, which can be confirmed with the naked eye.

  Then, when the lenticular lens 2 as the second discriminating tool is superimposed on the printed matter 1 with a predetermined angle (this is assumed to be 0 degree), as shown in FIG. 22 (a) or FIG. 22 (b). The second invisible image 17 appears as a visible image. Further, when the lenticular lens 2 as the second discriminating tool is superimposed on the printed matter 1 at an angle of 90 degrees with respect to a predetermined angle, it is shown in FIG. 23 (a) or FIG. 23 (b). Such a third invisible image 17 ′ appears as a visible image. As shown in FIG. 22 (a) or FIG. 22 (b) and FIG. 23 (a) or FIG. 23 (b), what appears to be negative-positive is relative between the lenticular lens 2 and the printed material 1. This is caused by the position and is within the scope of the effect of the present invention.

  Furthermore, the third embodiment includes a fourth invisible image that can be viewed without using a discriminator. This fourth invisible image is a design shared with the first invisible image. FIG. 24 shows the illumination light source 15, the viewpoint 16, and the printed matter 1 when the printed matter 1 is observed in the diffused light region and the specularly reflected light region in the printed matter 1 printed with the printed pattern 12 in the third embodiment. The three positional relationships are illustrated. When the illumination light source 15, the viewpoint 16, and the printed material 1 are in the positional relationship of FIG. 24A, the observation is performed in the diffused light region, and the illumination light source 15, the viewpoint 16, and the printed material 1 are in the positional relationship of FIG. In this case, it is observed in the specular reflection light region.

  As shown in FIG. 24A, when the printed matter 1 is visually observed in the diffused light region, as shown in FIG. 20, the printed pattern 14 made of colorless fluorescent ink applied on the printed pattern 12 is used. Is completely transparent, so that the pattern 13 in the printed pattern 12 mainly made of silver ink can be visually recognized. On the other hand, as shown in FIG. 24B, when the printed matter 1 is visually observed in the specular reflection light region, the printed pattern 12 made of silver ink has specular reflection light as shown in FIG. Brightness is increased by the effect of the glittering effect, and the glittering effect of the printed pattern 12 is suppressed for the portion of the printed pattern 14 made of colorless fluorescent ink. Thereby, only the printed pattern 14 is highlighted and visually recognized by the difference in glitter. Therefore, the design of “ume” configured by the arrangement of the printed pattern 14 is observed. That is, the fourth invisible image is made visible by the action of different glitter under the observation conditions. Note that the fourth invisible image has a design shared with the first invisible image.

FIG. 5 is a perspective view showing a state in which the printed matter 1 is observed visually from a viewpoint 9 while irradiating ultraviolet rays using an ultraviolet lamp 8. It is explanatory drawing in which the state observed with normal visible light and the state observed by irradiating the ultraviolet ray of the ultraviolet lamp 8 were shown. It is explanatory drawing by which the state observed with normal visible light and the state observed by irradiating with the ultraviolet-ray of the ultraviolet lamp 8 which is a 1st discrimination tool were shown. FIG. 5 is a perspective view showing a state in which ultraviolet rays 8 as a first discriminating tool are irradiated with ultraviolet rays on the printed material 1 and a lenticular lens 2 as a second discriminating tool is superposed. It is explanatory drawing in which the state which piled up the lenticular lens 2 which is a 2nd discrimination tool on the printed matter 1 with a predetermined angle (this shall be 0 degree | times) was shown. It is explanatory drawing in which the state which piled up the lenticular lens 2 which is a 2nd discrimination tool on the printed matter 1 with a predetermined angle (this shall be 90 degree | times) was shown. It is explanatory drawing by which the state observed with normal visible light and the state observed by irradiating with the ultraviolet-ray of the ultraviolet lamp 8 which is a 1st discrimination tool were shown. 2 is an enlarged view showing a configuration of one stroke of a printed pattern 3 with respect to a printed matter 1 in Embodiment 1. FIG. A line A and a line A ′ constituting the second invisible image, a line B and a line B ′ constituting the third invisible image, a line C constituting the pattern 4 and a pattern 10 are constituted. It is the schematic diagram shown simply so that each structure with the drawing line D to be understood may be understood. The printed pattern 3 of the printed material 1 shown in FIG. 9 is observed with ordinary visible light, and the line A, the line A ′, the line B, and the line that have been colorless and transparent until then with the colorless fluorescent ink. It is explanatory drawing in which the state which B ', the drawing line C, and the drawing line D excited by ultraviolet rays and was light-emitted was shown. FIG. 5 is a perspective view showing a state in which a lenticular lens 2 as a second discriminating tool is superimposed on a printed pattern 3 on a printed material 1 and visually observed from the front. It is explanatory drawing in which the state which observed the printed pattern 3 which irradiated the ultraviolet-ray with the ultraviolet lamp 8 which is a 1st discriminating tool, and was excited-emitted was observed visually from the front. It is explanatory drawing in which the state which observed the printed pattern 3 which irradiated the ultraviolet-ray with the ultraviolet lamp 8 which is a 1st discriminating tool, and was excited-emitted was observed visually from the front. It is explanatory drawing by which the state observed with normal visible light and the state observed by irradiating with the ultraviolet-ray of the ultraviolet lamp 8 which is a 1st discrimination tool were shown. FIG. 6 is an enlarged view showing a configuration of one stroke of a printed pattern 3 with respect to a printed matter 1 in Embodiment 2. A line A and a line A ′ constituting the second invisible image, a line B and a line B ′ constituting the third invisible image, a line C constituting the pattern 4 and a pattern 16 are constituted. It is the schematic diagram shown simply so that each structure with the image line D to be understood may be understood. The printed pattern 3 of the printed material 1 shown in FIG. 16 is observed with ordinary visible light, and the line A, the line A ′, the line B, and the line that have been colorless and transparent until then with the colorless fluorescent ink. It is explanatory drawing by which the state which B 'and image line D' excited by ultraviolet rays and was light-emitted was shown. It is explanatory drawing in which the state which observed the printed pattern 3 which irradiated the ultraviolet-ray with the ultraviolet lamp 8 which is a 1st discriminating tool, and was excited-emitted was observed visually from the front. It is explanatory drawing in which the state which observed the printed pattern 3 which irradiated the ultraviolet-ray with the ultraviolet lamp 8 which is a 1st discriminating tool, and was excited-emitted was observed visually from the front. It is explanatory drawing in which the drawing line structure of this Embodiment 3 was shown. It is explanatory drawing by which the ultraviolet ray was irradiated using the ultraviolet lamp 8 which is a 1st discriminating tool, and the state which the fluorescent ink excited by the ultraviolet ray and light-emitted was shown. It is explanatory drawing in which the state which piled up the lenticular lens 2 which is a 2nd discrimination tool on the printed matter 1 with a predetermined angle (this shall be 0 degree | times) was shown. It is explanatory drawing in which the state which piled up the lenticular lens 2 which is a 2nd discrimination tool on the printed matter 1 with a predetermined angle (this shall be 90 degree | times) was shown. In printed matter 1 in which printed pattern 12 in this Embodiment 3 was printed, it is explanatory drawing in which a state was shown when printed matter 1 was observed in a diffused light field and a regular reflection light field. It is explanatory drawing by which the brightness increased by the effect of the glitter which regular reflection light brings, and the effect of the glitter of the printed pattern 12 was suppressed by the part of the printed pattern 14 which consists of colorless fluorescent ink.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Print 2 Lenticular lens 3 Print pattern 4 Pattern which consists of arbitrary figures and characters 5 Print pattern which consists of arbitrary figures and characters 6 Pattern 7 Center line 8 Ultraviolet lamp 9 Viewpoint 10 Pattern which consists of arbitrary figures and characters 11 Any continuous Pattern composed of gradation 12 Printed pattern composed of ink containing glittering material 13 Pattern composed of arbitrary figure and character 14 Printed pattern composed of colorless fluorescent ink 15 Illumination light source 16 Viewpoint 17 Invisible image 20 Print composed of arbitrary figure and character Pattern A Image line B Image line C Image line D Image line L1 Line L2 Line L3 Line L4 Line S Dimensions

Claims (7)

A first image line and a second image line which are disposed on at least a part of the substrate with a colorless, transparent or light-colored material having a functionality so as to face the center.
A third image line and a fourth image line arranged with a colorless, transparent, or light-colored material having functionality so as to face the boundary along the second direction orthogonal to the first direction. Are arranged in a matrix at a constant pitch,
The first image line and the second image line in each of the image line elements are in an on / off relationship, have the same area, and are invisible by the first image line. A positive image or a negative image of the image is formed, and a negative image or a positive image of the first invisible image is formed by the second image line,
The third image line and the fourth image line in each of the image line elements are in an on / off relationship, have the same area, and are invisible by the third image line. An anti-counterfeit printed matter, wherein a positive image or a negative image of an image is formed, and a negative image or a positive image of the second invisible image is formed by the fourth image line.   2. The forgery-preventing printed matter according to claim 1, wherein the image line element has a square shape and a side length of 1 mm or less. The pixel element is arranged by a colorless transparent or light-colored material having the functionality in a region where the first image line, the second image line, the third image line, and the fourth image line do not exist. A fifth drawing line and / or a sixth drawing line,
The forgery prevention printed matter according to claim 1 or 2, wherein a third invisible image is formed by the fifth image line and / or the sixth image line.   The invisible image having a continuous tone is formed in the third invisible image by arbitrarily setting the shape of the fifth image line and / or the sixth image line. Item 4. An anti-counterfeit printed matter according to item 3.   5. The anti-counterfeiting according to any one of claims 1 to 4, wherein the colorless, transparent or light-colored material having functionality is an ink containing a material that develops color in the visible light region upon irradiation with energy rays. Printed matter.   The forgery prevention printed matter according to any one of claims 1 to 5, wherein at least one visible image is formed on the substrate.   The visible image is printed with ink containing a glittering material, and the first image line, the second image line, and the third image are positioned at a position that overlaps at least a part of the image line of the visible image. The forgery-preventing printed matter according to claim 6, wherein a fourth invisible image is formed by providing a line, the fourth image line, the fifth image line, and the sixth image line.

Images