JP4682283B2 - Latent image print using gloss difference - Google Patents

Description

  The present invention can provide a plurality of latent images effectively by providing regions having different light reflectivities for incident light from a certain direction on an image line having a convex structure or on a pixel having a convex structure. The present invention relates to a latent image print using a gloss difference with excellent authenticity discrimination.

  For printed matter requiring security such as banknotes, securities, and postal tickets, an authenticity determination element for distinguishing genuine products from counterfeit products is indispensable in order to prevent forgery.

  For example, a banknote that requires the highest degree of security is provided with a plurality of authenticity determination elements by various methods in a complex configuration. These elements can be broadly divided into true / false discriminating elements that require a special discriminating device and true / false discriminating elements that do not require a special discriminating device. It is customary to do so.

  As an example of the authenticity determination element that requires a special determination device, there is a technology that can determine authenticity by irradiating ultraviolet rays or infrared rays. Normally, it is applied to printed matter in a configuration that does not make general users aware of its existence, and it is used for discrimination between authenticators and vending machines. It is also used as a technology.

  As an example of the authenticity determination element capable of determining authenticity with the other natural light, there are watermarking, pearl printing, and latent image printing. It is used according to the purpose as an element that can be visually confirmed by the user when exchanging general goods and currency such as face-to-face sales.

  Recent advances in color copiers, home digital plate-making software, and output machines are remarkable. Along with this, there are many cases in which ordinary people who have no experience in special printing make counterfeit copies of security prints by copying with a color copier or output from a personal computer and using them at face-to-face sales or ticket exchanges. is doing. The elements necessary to prevent forgery in this case are not true / false discriminating elements that require a special device, but authenticity / discriminating elements that can be confirmed in a normal use environment such as using natural light that does not require a device. is there.

  Advanced counterfeiting that does not require special equipment that cannot be reproduced with printers using color copies or general personal computers in order to counter these various counterfeits using digital plate-making technology for face-to-face sales. New security printing with discriminating elements is desired.

  The technology having a latent image effect capable of determining authenticity by using natural light as described above is represented by a translucent technique known from Bank of Japan. There are many other technologies that can determine authenticity using natural light, and one of them is a technology that uses the gloss of ink to make a latent image appear. For example, using fine organic pigments with good wettability, mainly blending glossy ink that is kneaded with an increased amount of varnish and an inorganic pigment with large particle size and poor wettability, and reducing the amount of varnish and kneading. A technique has been proposed in which offset printing is performed by using matte inks that are combined with each other (see, for example, Patent Document 1).

  As another example, by providing a metallic luster area on the surface of the sheet and forming the same, homogeneous or different metallic luster area on at least a part of the area, the difference in reflectance is given to those areas. A technique has been proposed in which these areas look different in color depending on the viewing angle of the printed matter (see, for example, Patent Document 2).

  The techniques described in Patent Document 1 and Patent Document 2 merely confirm the presence or absence of a single latent image. Among the techniques capable of authenticating using the above-mentioned natural light, two more techniques are available. There are also techniques that make more than one latent image appear easily. For example, in the case of security prints that generate only one latent image, forgery such as overprinting the latent image using low-gloss ink, or applying a latent image by embossing the paper, etc. There are an unlimited number of methods. However, in the case of a technique in which a latent image changes (has a plurality of latent images) in one area, all the changed images must be reproduced at the time of forgery. From the above, it is believed that the greater the number of latent images that can be generated, the greater the number of elements to be verified and verified for authenticity determination. .

  However, the number of techniques that generate natural latent images using natural light is small, and if there are three or more latent images, a known technique is a latent image technique using a lenticular or a diffraction grating. The reality is that it is almost limited to holograms.

Japanese Patent Laid-Open No. 03-266684 JP 2000-158789 A

  One of the most well-known latent image technologies using light is transparent, which utilizes the fact that light passing through the inside of paper with different thickness and density is partially attenuated. Unlike paper and plastic, paper that scatters light passing through it at a constant rate is used as a base material, so that it is difficult to form a large number of latent images.

  In the technique described in Japanese Patent Laid-Open No. 03-266684, the number of latent images that can be applied in the same area is basically one. Although it is possible to increase the number of latent images using inks having different glossiness, in that case, a phenomenon occurs in which the latent images appear overlapping each other. This is not a technique capable of providing a plurality of clear latent images.

  The technique described in Japanese Patent Application Laid-Open No. 2000-158789 is a technique capable of positive / negative reversing a latent image using a difference in gloss of the latent image portion after a latent image is applied. However, although positive / negative reversal is possible, it is impossible to change the image like the technique described in Japanese Patent Laid-Open No. 03-266684, and a clear multi-latent image similar to the technique described in Japanese Patent Laid-Open No. 03-266684. It is not a technology that can be applied.

  In the case of latent image technology using lenticular, a certain distance is required to focus on the surface on the substrate on which the latent image is printed and the lens surface of the lenticular, so the printed material is thick. In many cases, it is used only for special cards that allow a certain thickness. In addition, there is a problem that the bonding with the lens is necessary and the processing process is complicated.

  Furthermore, although the hologram can be made extremely thin and can clearly produce a plurality of latent images, its manufacturing and processing steps are complicated, and there is a problem that it is extremely expensive compared to printed matter. Moreover, since an aluminum vapor deposition film is used in many cases, the external appearance becomes a unique metallic tone.

  As described above, it is difficult to clearly generate a plurality of latent images in the same area, or the manufacturing process is complicated or the image to be configured is fixed in these conventional techniques capable of determining authenticity under natural light. There are various problems that colors and functional materials are necessary and expensive.

  The object of the present invention is to solve the above-mentioned problems, and in a glossy convex image line or pixel assembly having a certain gloss, only the surface that is normal to the incident light strongly reflects and reflects light strongly. By simultaneously using the effect that the relative gloss difference caused by the difference in material and thickness is greatly enhanced in the specular reflection region, multiple latent images that do not correlate the image in the same place are expressed. It is an object of the present invention to provide a latent image printed material excellent in visibility using gloss difference.

  In an environment in which light is incident from a certain direction, the structure having a glossy convex shape strongly reflects light regularly around a surface that is normal to the incident light. When this glossy convex structure has a certain degree of light reflectivity, the specular reflection area gives an impression that it has expanded and floated as a positive image area, and the light is normal to the surface. The part which does not become shadow becomes a shadow and gives an impression that it becomes invisible or the area becomes small visually. This effect is further enhanced when the glossy convex structure is brought into close contact to form a glossy convex aggregate.

  For example, if glossy convex lines are continuously arranged in parallel at a constant pitch, and light is irradiated to the glossy convex parallel lines from a certain incident direction, the image looks like a glossy convex shape visually. It looks as if all faces of the line are specularly reflecting light. In addition, even when the incident direction of light on the base material is changed, the entire surface looks as if the light is regularly regularly reflected, but only the surface in which the incident light is in the normal direction is actually seen. The light is selectively specularly reflected, and the reflecting surface changes according to the incident direction of the light.

  On the other hand, when the image line 2 is formed on the image line 1 having a constant reflectivity with respect to light with an ink having a lower reflectivity than that of the image line 1, the image line 1 due to the difference in the reflectivity with respect to light. As a positive image line, the image line 2 formed with low reflectance ink becomes a negative image line, and the image line 2 floats more clearly as a negative image line due to the relative gloss difference in the regular reflection region.

  The present invention uses a phenomenon in which the surface of the convex structure having a high glossiness changes the surface that strongly reflects and regularly reflects the light according to the angle of incident light. By arranging the latent images at the same pitch, the latent images are switched according to the angle of the incident light. The latent image is given by forming a structure having a reflectance different from that of the convex structure on the convex structure. Examples of forming different reflectances include a method of applying with a low gloss ink, a method of cutting an image surface layer, and a method of changing the thickness. As described above, it is possible to recognize the latent image more clearly by the relative gloss difference generated in the specular reflection area, and each of the latent images arranged in a very narrow area on the glossy convex shape image line. Without being mixed, the latent image printed matter using the difference in gloss can be produced independently by inclining at different angles.

  The latent image printed matter using the gloss difference of the present invention is a latent image printed matter in which a plurality of glossy convex shaped image lines having the same width and gloss are arranged on a substrate at a predetermined pitch. At least one latent image line having a width of 1 / n or less of the image line width is arranged in parallel with a part of the glossy convex shape line at the same pitch, and the image of the latent image line is The line height is formed lower than the line height of the glossy convex shape line.

  The latent image printed matter using the gloss difference of the present invention is formed so that the line height of the glossy convex image line is 10 μm or more, and the image line height of the glossy convex image line and the image line height of the latent image line are The difference is 4 μm or more.

  The latent image printed matter using the gloss difference of the present invention is a latent image printed matter in which a plurality of glossy convex shaped image lines having the same width and gloss are arranged on a substrate at a predetermined pitch. And at least one latent image line having a gloss different from the glossy convex line and having a width of 1 / n or less of the line width of the glossy convex line, It is characterized by being arranged in parallel with the same pitch as the glossy convex image line.

  The latent image printed matter using the gloss difference according to the present invention is formed so that the height of the glossy convex image line is 1 μm or more, and the difference between the glossiness of the glossy convex image line and the glossiness of the latent image is 50 or more.

  The latent image printed matter using the difference in gloss according to the present invention is a latent convex printed pixel in which a plurality of glossy convex pixels having the same area having gloss are arranged on a substrate at a predetermined pitch. At least one latent image pixel having an area of 1 / n or less of the area is regularly arranged at the same pitch on a part of the glossy convex pixel, and the pixel height of the latent image pixel is glossy. It is characterized by being formed lower than the pixel height of the convex pixel.

  The latent image printed matter using the gloss difference of the present invention is formed such that the glossy convex pixel has a pixel height of 10 μm or more, and the difference between the glossy convex pixel height and the latent image pixel height is 4 μm or more. It is characterized by being.

  The latent image printed material using the gloss difference of the present invention is a latent image printed material in which a plurality of glossy convex pixels having the same area having gloss are arranged on a substrate at a predetermined pitch. Furthermore, at least one latent image pixel having a gloss different from that of the glossy convex pixel and having an area of 1 / n or less of the pixel area of the glossy convex pixel is the same as the glossy convex pixel. It is characterized by being regularly arranged at a pitch.

  In the latent image printed matter using the gloss difference of the present invention, the glossy convex pixel has a pixel height of 1 μm or more, and the difference between the glossiness of the glossy convex pixel and the glossiness of the latent image pixel is 50 or more. It is characterized by being.

  By selectively providing a glossy convex image line with a structure having different light reflectance, a plurality of latent images can be applied to the same image area, which has been difficult until now, very easily. Depending on the rising height of the glossy convex line and the gloss of the line, it is easy to apply three or more latent images that are almost impossible with conventional general latent image technology.

  In addition, since the difference in gloss between pixels and image lines is basically used, it is possible to implement a transparent image line structure in which pigments and dyes are not mixed with varnish and medium. This means that there is no occurrence of plate clogging or poor transfer of pigments and dyes which are problematic in the printing process, and the load on the manufacturing side is significantly reduced.

  On the other hand, the effect of the appearance of the latent image is not impaired at all even if the glossy convex shaped image line is colored with a coloring dye or pigment so that the glossiness does not decrease. It is possible to change the configuration. It is also possible to construct a significant image on the glossy convex shape image line by coloring and dividing the glossy convex shape image line or changing the image line width. improves.

  Compared to multiple latent image technologies that use the lens effect of glossy convex lines using lenticulars, there is no need to set the focal length between the substrate on which multiple latent images are applied and the lens. Therefore, it is possible to suppress the thickness of the printed material, and the height of the glossy convex shape required by the present invention is a printing method such as an offset printing method, a gravure printing method, a screen printing method, an intaglio printing method, etc. Therefore, the production is very easy.

  In addition, the present invention is not limited to a metallic tone like a hologram, and the hue selectivity is extremely high, so that it can be arranged in a printed material without a sense of incongruity. In addition, the latent image effect is not impaired even if the glossy convex shaped image line of the present invention is suppressed to a transparent or light hue, which reduces the visibility of the image arranged under the latent image print using the gloss difference. This is a great difference that makes the effect different from that of a hologram in which it is impossible to confirm the image under the latent image print using gloss difference.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an image line configuration and a cross section of a latent image print using gloss difference in an embodiment of the present invention. FIG. 2 shows the visibility of a latent image printed material using a gloss difference by changing the image line heights of the latent image A and the latent image B from level 1 to level 9 in one embodiment of the present invention. Results are shown. FIG. 3A shows a case where the latent image printed matter using the gloss difference in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant, and FIG. 3B is an environment where regular reflection is dominant. The case where the incident light is observed to be tilted about 5 degrees toward the front side is shown, and (c) is observed to be tilted about -5 degrees away from the incident light in an environment where specular reflection is dominant. Show the case. FIG. 4 shows an image line structure of the colored convex image (5) in one embodiment of the present invention. FIG. 5 shows the detailed image line structure of the latent image in the present invention. FIG. 6 shows image line configurations of the latent image A, the latent image B, and the latent image C in one embodiment of the present invention. FIG. 7 shows the visibility of a latent image printed material using a difference in glossiness by changing the line width of the latent image and changing the number of latent images from level 1 to level 4 according to the embodiment of the present invention. The result of confirming is shown. FIG. 8A shows an image line configuration of a latent image printed material using gloss difference in one embodiment of the present invention, and FIG. 8B shows a cross section thereof. FIG. 9A shows a case where a latent image print using a difference in gloss in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant, and FIGS. 9B and 9C are views. The case where the observation is performed at an angle with respect to the incident light in an environment where specular reflection is dominant is shown. FIG. 10 shows a diagram in which a plurality of colored glossy convex pixels are arranged in one embodiment of the present invention. FIG. 11 shows the configuration of the latent image pixel F, the latent image pixel G, the latent image pixel H, and the latent image pixel I in one embodiment of the present invention. FIG. 12 shows an image line structure of a latent image print using a gloss difference in an embodiment of the present invention. FIG. 13A shows a case where the latent image printed matter using the gloss difference in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant, and (b), (c), (d) and (E) shows the case where it observes by inclining a fixed angle with respect to the light which injects in the environment where regular reflection is dominant. FIG. 14 shows an image line configuration of a latent image printed matter using a gloss difference in an embodiment of the present invention. FIG. 15 shows a three-dimensional object of a latent image in one embodiment of the present invention. FIG. 16 shows the detailed image line structure of the latent image in the present invention. FIG. 17 shows the line composition of the latent image composite image line in the latent image A, latent image B, latent image C, latent image D, and latent image E in one embodiment of the present invention. FIG. 18 shows an image line structure and a cross section of a latent image printed matter using gloss difference in an embodiment of the present invention. FIG. 19 shows an image line configuration of a latent image composite image line in the latent image A and the latent image B according to an embodiment of the present invention. FIG. 20A shows a case where the latent image printed matter using the difference in gloss in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant with respect to incident light, and FIGS. ) Shows a case where observation is performed at an angle with respect to incident light in an environment where specular reflection is dominant.

  First, a latent image printed matter using a difference in gloss that causes two latent images to appear by one printing will be described with reference to FIGS. 1, 2, and 3.

  The UV curing type screen printing method (hereinafter referred to as “UV screen printing method”) was used as the printing method for constructing the glossy convex image. In the UV screen printing method, compared to the offset printing method and the gravure printing method, the shading of the image line appears as a difference in the image line height. It is possible to generate a partial gloss difference with respect to the light entering from the light source.

  FIG. 1 shows an image line configuration and a cross section of a latent image printed matter (1) using a gloss difference in one embodiment of the present invention. The image line structure of the latent image print is a single line, arranged in parallel at a constant pitch, and in the glossy convex line L (2) having a line height of 15 μm (the line density of the printed film is 100%). Further, the latent image A (3) and the latent image B (4) have the same pitch as the glossy convex image line L (2) and the line width of the glossy convex image line L (2). The image was divided by a width of about one third, and the image line configuration was arranged with an image line height of 11 μm (image line density in printed film 60%). This is because one image line has a convex shape with two steps (with a step), and the latent image A (3) is formed on one inclined surface of the convex shape, and the latent image B ( 4) is formed.

  The image line height is the film thickness of the image line relative to the surface of the printed material, and the image line density is the density of the image line on the printed film that correlates with the image film thickness. The higher the line height, the darker the line density. Conversely, the lower the line height, the lighter the line density. Accordingly, in this embodiment, the image line height of 15 μm is set to 100% of the image line density of the printing film, whereas the image line density of 60% of the printing film is based on the correlation between the image line density and the image line height. , With a line height of 11 μm.

  In addition, when the UV screen printing method is used, the image line height depends on the number of screen mesh lines, the number of printed film lines, the height of the glossy convex image line, and the characteristics of the ink used. When the printing material and printing conditions are changed, it is necessary to change each time.

  This time, as shown in FIG. 2, a prototype printed material in which the lines forming the latent image A (3) and the latent image B (4) from level 1 to level 9 were changed in advance was highly effective. After confirming the level, it was determined that the image line height was 11 μm (image line density 60%) used at level 4, which was the most effective. The pitch of the glossy convex line is not particularly limited, but it is desirable from the viewpoint of visibility that the pitch is short and the ratio of the line part to the non-line in the slit structure is 1 or more. .

  The line height of the glossy convex shape by UV screen printing is 15 μm, the line pitch is 0.6 mm, and the ratio between the line and the non-line is 3: 1 (0.45 mm: 0.15 mm), The ratio of latent image A (3): glossy convex shaped image line L (2) (region where no latent image is applied to the image line): latent image B (4) is 1: 1: 1 (all 0.15 mm width). The ink used was a UV screen medium (Nagase Screen Printing Laboratory A-Z). The 60 ° glossiness (measured with Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) of this ink is 97.2 in the solid portion of the printed matter.

  Using this printing plate and ink, printing was performed on coated paper to obtain a latent image print (1) utilizing the difference in gloss.

  FIG. 3 shows the effect of observing the latent image print using the gloss difference in this embodiment. FIG. 3A shows that the latent image print using the gloss difference is dominated by diffuse reflection. When observed in an environment, FIG. 3 (b) shows a case where a latent image print using a difference in gloss with respect to a light source is tilted about 5 degrees toward the front in an environment where specular reflection is dominant, and FIG. 3 (c). Indicates an image that can be authenticated when a latent image print using a difference in gloss with respect to the light source is tilted about -5 degrees and observed in an environment where specular reflection is dominant. The latent image print using this difference in gloss is colorless and transparent when observed in an environment where diffuse reflection is dominant, and is recognized as a completely non-image, and is tilted about 5 degrees in the environment where regular reflection is dominant. In this case, it was confirmed that the latent image B appeared due to the partial gloss difference of the image lines, and conversely, the latent image A appeared when tilted to the other side by -5 degrees.

  Next, a latent image printed matter using a difference in gloss that causes one image and three latent images to appear by two printings will be described with reference to FIGS.

  Since the present invention is a technology that uses the gloss difference of the image line, the gloss difference of the material itself, such as printing a glossy convex image line with a high gloss ink and printing a latent image with a low gloss ink, is effectively utilized. By utilizing it, the effect of the present invention can be further enhanced. The high-gloss ink referred to here is an ink having a gloss of about 50 at a glossiness of 60 °, and the low-gloss ink is a high-gloss used for printing a glossy convex image line. The ink has a lower gloss than the ink. The effect of the present invention can be enhanced as there is a difference in gloss between high-gloss ink and low-gloss ink.

  This example is an example of forming a latent image print using one gloss difference using two types of high-gloss ink and low-gloss ink. In addition, a glossy convex image line using high-gloss ink is used. The colored pigment is mixed and colored, and by changing the line width of this glossy convex line, a meaningful image is formed even in an environment where diffuse reflection is dominant, and then on the glossy convex line. This is an example in which the authenticity discrimination of the present invention is further enhanced, in which a large number of latent images are clearly generated by superimposing low gloss ink and printing.

  In this embodiment, the UV glossy printing line M (6a, 6b) was used for the high glossy colored glossy convex image line M, and the offset printing system was used for the low glossy image line.

  FIG. 4 shows an image line configuration of colored glossy convex shaped image lines M (6a, 6b) in the colored convex image (5) which is printed once, and the image line M (6a) has a constant pitch. An image line having an image line width of 0.45 mm is arranged as parallel lines at a pitch of 0.6 mm with a non-image line part of 0.15 mm interposed therebetween. Further, the image line M (6b) and the image line M (6b) are provided by providing a non-image line portion of 0.15 mm orthogonal to the image line M (6a) which is a parallel line. Since the color density and the reflectance of the image are different from each other, the region arranged on the image line M (6b) can be visually recognized as “NPB”.

  Next, FIG. 5 shows an example of an image line configuration for producing a latent image composite image. A case where three patterns of latent images appear will be described. First, the latent image A, the latent image B, and the latent image C are each divided into four. The latent image A is divided into A1, A2, A3, and A4, and the latent image B is divided into B1, B2, B3, and B4, and the latent image C is divided into C1, C2. , C3 and C4. Thereafter, a single line is produced by A1, B1, and C1, a single line is produced by A2, B2, and C2 in the same manner, and a single line is produced by A3, B3, and C3. A latent image composite image is produced by synthesizing all the lines produced in this way.

  In this description, each latent image line has the same number of divisions, and each divided image is gathered into four lines, but the number of divisions of each latent image and the arrangement of each divided image are appropriately selected. do it.

  Using this method, a latent image composite image that is printed twice is produced. FIG. 6 is a latent image composite image (7) produced so that three patterns of latent images appear, and is a diagram showing an image line configuration used for an offset plate for forming a low gloss image line. The latent image A, the latent image B, and the latent image C are arranged at the same pitch as the image line M (6a, 6b) and the image line M (6a, 6b) having a colored glossy convex shape. Divide by 1/3 width, ie 0.15 mm. In accordance with the method described above, the lines are arranged in order without gaps to produce a single line (18), and similarly, all the lines for the latent image are produced. All the manufactured lines are constructed with a pitch of 0.6 mm with a non-image portion of 0.15 mm in between.

  As a matter of course, the number of latent images that can be applied to an image depends mainly on the width and height of the glossy convex line and the gloss of the line, so it is appropriate for the printing conditions including the ink characteristics. It is necessary to check the number of latent images.

  The appropriate number of latent images referred to here is the number of latent images that can be observed in one glossy convex image line on condition that they can be observed visually without any sense of incongruity and do not mix with other latent images. It is.

  The height of the glossy convex image line made of the screen ink used this time is about 15 to 20 μm, and the image line gloss is also high, so as shown in FIG. It was determined with reference to the experimental results of prototype prints with varying number of latent images by changing the line width. Although the number of latent images can be confirmed, the visibility is felt low when observed in an observation environment in which light sources exist in a plurality of directions. In this example, only three latent images are applied. I am going to do that.

  In this example, ink using two types of high-gloss ink and low-gloss ink is 96% UV screen medium (NAGASE SCREEN LABORATORY AZ), 4% Asahi Kasei Kogyo Cobalt Blue CR-4. In addition, 2% of antifoaming agent is added on an external basis, and the mixture is stirred for about 3 minutes using a high-speed disperser (Homodisper f model manufactured by Tokushu Kika Kogyo Co., Ltd.). A screen ink was prepared. The 60 ° glossiness (measured by Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) of this ink is 75.5 in the solid portion of the printed matter.

  Further, mat varnish (OP Varnish_new_champion mat manufactured by Dainippon Ink & Chemicals, Inc.) was used as the offset ink constituting the low gloss image line. The 60 ° glossiness (measured by Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) of this ink is 5.5 in the solid portion of the printed matter.

  Since it is a technique for applying a latent image by the gloss difference of the image line, the effect of the invention is enhanced as the gloss of the offset print image line is lower.

  As shown in FIG. 8, a plurality of colored glossy convex lines M (6) as shown in FIG. 4 are printed on the coated paper using a colored and high gloss screen ink, and then the low gloss offset is applied. A latent image in which a plurality of lines composed of a latent image line C (8), a latent image line D (9), and a latent image line E (10) are arranged using ink as shown in FIG. The composite image (7) is overprinted to obtain a latent image print using the difference in gloss.

  Between the latent image line C (8), the latent image line D (9), and the latent image line E (10) constituting one line of the latent image composite image (7) in FIG. In order to make a latent image change like a moving image, it is preferable to arrange them without gaps as shown in FIG. However, the image line width of the colored convex shape image line M (6) and the image line widths of the latent image image line C (8), the latent image image line D (9), and the latent image image line E (10). Depending on the case, the present invention is not limited to this, and a slight gap may be provided between the latent image line C (8), the latent image line D (9), and the latent image line E (10). In this case, the latent image composed of the latent image line C (8), the latent image composed of the latent image line D (9), and the latent image composed of the latent image line E (10). The image changes and is visually recognized very clearly without being mixed.

  FIG. 9 shows the effect of the invention, and FIG. 9A shows a latent image print using a difference in gloss when observed in an environment where diffuse reflection is dominant, and FIG. 9B and FIG. FIG. 9D shows respective images that can be authenticated when the latent image print using the gloss difference is tilted and observed with respect to the light source in an environment where specular reflection is dominant. Latent image printed matter using this difference in gloss can be recognized only as “NPB” when viewed from an angle in an environment where diffuse reflection is dominant, and is observed when the angle is observed in an environment where specular reflection is dominant. It was confirmed that the latent image A, the latent image B, and the latent image C in FIG. By continuously tilting the latent image print using the difference in gloss, it is recognized as a moving image as if a bird is flapping.

  In the embodiment, the latent image composite image (7) is a solid matt varnish, and the colored convex image (5) is not matt varnished. However, the colored convex image (5) is a solid matt varnish. Needless to say, the configuration in which the matte varnish is not used in the image composite image (7) is a configuration in which the pattern of the latent image is simply positive / negative inverted, and the configuration of the invention is completely the same.

  Next, a latent image print using a difference in gloss that causes one image and four latent images to appear by two printings will be described with reference to FIGS.

  In this embodiment, the glossy convex shaped image line constituted by the parallel lines in the two embodiments is provided with a non-image line portion having a constant pitch in the vertical direction in addition to the horizontal direction, and in a grid-like square shape. By using a certain colored glossy convex pixel N (11a) and arranging a latent image parallel to each direction, a difference in gloss is used that can generate different latent images when tilted vertically and horizontally. It is an example regarding the latent image printed matter (11). Here, the pixel shape refers to a minimum shape unit such as a polygon, a circle, or an ellipse.

  In this example, a latent image print using one gloss difference was made using two types of high-gloss ink and low-gloss ink. In addition, a square gloss convex shape using high-gloss ink was used. Colored pigments are mixed into the pixels, and low gloss ink is superimposed on the glossy convex pixel and printed, and when it is tilted in a total of four directions (up, down, left, and right), a latent image is clearly generated. This is an example in which the authenticity discrimination of the invention is further enhanced.

  In this embodiment, the high glossy square glossy convex pixel uses the UV screen printing method, and the low glossy image line uses the offset printing method. FIG. 10 is a diagram in which a plurality of colored glossy convex pixels N (11a) according to the present embodiment are arranged, and has a pixel configuration having non-image portions with a constant pitch on the top, bottom, left and right. The pixel shape is a square of 0.45 mm × 0.45 mm, and a non-image portion of 0.15 mm is provided above and below and arranged at a pitch of 0.60 mm.

  FIG. 11 shows a configuration of an image line used for an offset plate for forming a low gloss image line that becomes a latent image. The latent image pixel F (12), the latent image pixel G (13), and the latent image pixel H (14). The latent image pixel I (15) has the same pitch as that of one pixel in FIG. 10, and each image line is formed in a positional relationship parallel to each side in the four directions of the pixel. In this way, when arranged on each side, it is desirable that no image line be arranged at the four vertices of the quadrangle so that a plurality of latent images do not appear simultaneously when tilted.

  The ink to be used is 96% UV screen medium (Nagase Screen Printing Laboratory A-Z), 4% Asahi Kasei Kogyo Cobalt Blue CR-4, 2% extra defoamer added, high speed dispersion Stirring was performed for about 3 minutes using a machine (Special Machine Chemical Industries, Ltd._Homodisper f model) to produce a colored high gloss screen ink used in the present invention. The 60 ° glossiness (measured by Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) of this ink is 75.5 in the solid portion of the printed matter.

  Further, mat varnish (OP Varnish_new_champion mat manufactured by Dainippon Ink & Chemicals, Inc.) was used as the offset ink constituting the low gloss image line. The 60 ° glossiness (measured by Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) of this ink is 5.5 in the solid portion of the printed matter.

  Each latent image pixel F (12), latent image pixel G (13), latent image pixel H (14), and latent image pixel I (15) is 0.07 mm × 0.3 mm, or 0.3 mm × 0.07 mm. It is composed of rectangles.

  As shown in FIG. 12, a colored glossy convex pixel N (11a) is printed on a coated paper using a colored high gloss screen ink, and then a latent image pixel F (12) is printed using a low gloss offset ink. ), Latent image pixel G (13), latent image pixel H (14), and latent image pixel I (15) were overprinted to obtain a latent image print using a difference in gloss.

  13A and 13B show the effects of the invention. FIG. 13A shows the latent image print using the difference in gloss when observed in an environment where diffuse reflection is dominant with respect to the light source. ), (D), and (e) show respective images that can be authenticated when the latent image printed material using the gloss difference is tilted and observed with respect to the light source in an environment where specular reflection is dominant.

  In this embodiment, the low gloss image line is arranged on each side of the pixel forming the colored glossy convex pixel N (11a). However, as shown in FIG. It goes without saying that the same effect can be obtained even when arranged in the case.

  Next, a latent image printed material using a difference in gloss that is cut after screen printing is printed once to make continuous images appear will be described with reference to FIGS. 15, 16, and 17.

  In the present embodiment, the latent image is an inverted image in the diffusion region, and the image added as the latent image in the regular reflection region is visually recognized as a latent image transition like a three-dimensional object.

  This example irradiates a glossy convex shape image line with a laser having an appropriate wavelength, and slightly cuts the surface layer of the glossy convex shape image line in comparison with the glossy convex shape image portion not irradiated with the laser. Use technology that provides low-reflection images with low gloss.

  The image line pitch in the glossy convex image line is 0.6 mm, which is a parallel line composed of an image line of 0.45 mm and a non-image line of 0.15 mm, and has an image line height of 15 μm. Moreover, the silver screen ink (Wallstenholm company make: Miracene) containing the vapor deposition aluminum pigment was used for the ink, and the UV screen printing system was used. The 60 ° glossiness (measured by Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) of this ink is 199 or more and the 75 ° glossiness is 179.

  As the latent image, images taken at angles of 0 degrees, 5 degrees, 10 degrees, -5 degrees, and -10 degrees from a distance of about 50 cm with respect to the three-dimensional object (16) shown in FIG. 15 are used. Latent image C is a photograph taken in front of a three-dimensional object, a latent image B is a photograph taken from an angle of 5 degrees from the center of the three-dimensional object, and a photograph is taken from an angle of 10 degrees from the center of the three-dimensional object. The latent image A, a photograph taken from an angle of −5 degrees from the center of the three-dimensional object, and a latent image E are a photograph taken from an angle of −10 degrees from the center of the three-dimensional object.

  Next, FIG. 16 shows an example of an image line configuration for producing a latent image composite image. A case where five patterns of latent images appear will be described. First, the latent image A, the latent image B, the latent image C, the latent image D, and the latent image E are each divided into four. The latent image A is divided into A1, A2, A3, and A4, and the latent image B is divided into B1, B2, B3, and B4, and the latent image C is divided into C1, C2. , C3, C4 and the latent image D are divided into D1, D2, D3 and D4, and the latent image E is divided into E1, E2, E3 and E4, respectively. After that, one line is made by A1, B1, C1, D1, E1, and one line is made similarly by A2, B2, C2, D2, E2, A3, B3, C3, D3, One line is made by E3, and one line is made by A4, B4, C4, D4, and E4. A latent image synthesized image is produced by synthesizing a plurality of lines thus produced.

  The latent image composite image is converted into data for laser processing, and laser processing is performed on the glossy convex image line to produce a latent image composite image. FIG. 17 is a latent image composite image (17) produced so that five patterns of latent images appear. The latent image A, the latent image B, the latent image C, the latent image D, and the latent image E are each divided by a line width of 0.09 mm, and the lines are sequentially arranged according to the method described above. An image line (18) for forming a latent image composite image with no gap is produced, and all lines for the latent image are produced in the same manner. All the produced lines are sandwiched by non-image lines of 0.15 mm, and are composed of 0.6 mm having the same pitch as the glossy convex image lines. Thereafter, the lines of the constructed latent image are synthesized to produce a latent image synthesized image.

  The laser irradiation device used to generate a latent image composite image on the surface layer of the glossy convex image line uses a YVO4 laser marker (manufactured by Keyence Corporation) with a wavelength of 1 μm. The laser irradiation conditions are laser power 25%, scan The speed was set to 2000 mm / s and the Q switch frequency was set to 100 kHz. When a laser is applied to the glossy convex image line by this output, the 60 ° glossiness of the silver ink irradiated with the laser is 16.7.

  In this embodiment, because the purpose is to produce a hologram-like printed matter, the latent image composite image can be visually recognized as a negative image to some extent in the diffuse reflection area as in the actual hologram, and the visibility of the latent image in the regular reflection area is set. Therefore, the surface of the glossy convex line is partially cut to such an extent that the latent image can be viewed in the diffuse reflection area. It is preferable to keep the output low.

  Further, the wavelength of the laser needs to be selected in accordance with the visibility in the regular reflection region and the visibility of the image in the diffusion region of the latent image printed matter using the gloss difference, and the substrate on which laser cutting (laser irradiation) is performed. For example, when cutting a glossy convex image line having a low image density, both the concealment of the latent image composite image in the diffuse reflection area of the latent image print using the difference in gloss and the visibility of the latent image in the regular reflection area are compatible. Therefore, it is preferable to use a carbon dioxide laser.

  The produced latent image print using the gloss difference is visually recognized as a glossy convex image line as a negative image in the diffuse reflection area, but the latent image C is produced in an environment where regular reflection is dominant by tilting with respect to light. Turns to a positive image. When tilted 5 degrees from that state, the latent image D appears, and when tilted 10 degrees, the latent image E appears. When tilted by -5 degrees, the latent image B appears, and when tilted by -10 degrees, the latent image A appears.

  Since there is only a slight difference between the viewing angles at which these latent image images are viewed, the transition of the latent image is partially viewed as a mixture of two images, or viewed separately, so While allowing different latent image images to be visually recognized by the eyes, it can be visually recognized as a smooth image transition between the latent images. Further, when the latent image in the regular reflection region is confirmed at an appropriate distance from the latent image printed matter using the gloss difference, it can be visually recognized as a three-dimensional object.

  In the first to fourth embodiments, the glossy convex image line is formed by a screen printing method which is a printing method having a high image line height. In this embodiment, the glossy convex image line is formed by an offset printing method. A latent image printed material that is formed and forms a latent image composite image by the offset printing method and realizes high productivity will be described with reference to FIGS. 18, 19, and 20. FIG.

  The present embodiment is an example in which the latent image printed matter is formed by utilizing a slight image line height that can be formed by the offset printing method. Even if the image line height is several micrometers, It shows that the glossy convex image line described in the item can be formed. The printed material is in an imageless state that cannot be recognized as an image in the diffusion region, and in the specular reflection region, the latent image printed material is slightly tilted so that two or more images are switched and viewed as latent images. .

  The glossy convex image line J (19) shown in FIG. 18 is a parallel slit image, the image line pitch in the slit is 0.15 mm, and consists of a 0.1 mm image line and a 0.05 mm non-image line. The height is 1 to 3 μm. The latent image line (20) constituting the latent image A in FIG. 19 and the latent image line (21) constituting the latent image B in FIG. 19 are arranged at the same pitch on the glossy convex line. ing. The ink forming the glossy convex image line J (19) uses a highly glossy OP varnish (Dainippon Ink & Chemicals Co., Ltd .: POP-K OP varnish) and uses an oxidation polymerization wet offset printing method. . The 60 ° glossiness of this ink (measured with Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) is 61.3.

  Next, FIG. 19 shows an example of an image line configuration for producing a latent image composite image. A case where two patterns of latent images appear will be described. First, the latent image A and the latent image B are each divided at the same pitch. Each of the divided latent image A is A1, A2, A3, and A4, and each of the latent image B is similarly divided into B1, B2, B3, and B4. After that, a single line including A1 and B1 and a non-image line sandwiched between A1 and B1 is produced, and similarly A1 and B2 including a non-image line between A2 and B2 One line with A3 and B3 and a non-line between A3 and B3, one line with A4 and B4 and a non-line between A4 and B4 Make the line. A latent image synthesized image is produced by synthesizing a plurality of lines thus produced.

  Each latent image of latent image A and latent image B is divided by an image line width of 0.03 mm, and 0 between the image line (example: A1) and the image line (example: B1) according to the method described above. A single line with a non-image line of 0.03 mm is produced, and all the lines for the latent image are produced in the same manner. All the produced lines are sandwiched by non-image lines of 0.06 mm, and are composed of 0.15 mm of the same pitch as the glossy convex image lines. Thereafter, the lines of the constructed latent image are synthesized to produce a latent image synthesized image.

  As shown in FIG. 18, the glossy convex image line J (19) is printed on the coated paper, and then the latent image A is printed using low-gloss offset ink (OP Varnish_new_champion mat manufactured by Dainippon Ink & Chemicals, Inc.). (20) The latent image B (21) was overprinted to obtain a latent image print utilizing the difference in gloss. The 60 ° glossiness of the low-gloss offset ink (measured with Murakami Color Research Laboratory Co., Ltd._digital gloss meter GM-3D) is 5.5 in the solid portion of the printed matter.

  Since the produced latent image print using the gloss difference is formed of transparent ink in the diffuse reflection area, the glossy convex image line J, the latent image A, and the latent image B are both formed in FIG. 20A. As shown in the figure, the glossy convex image line J reflects light in an environment where the image is almost invisible and is imageless, and the regular reflection is dominant by inclining the latent image printed material with respect to the light. When tilted by 1 to 2 degrees from the specular reflection state, a latent image B appears as shown in FIG. 20B, and when tilted by -1 to 2 degrees as shown in FIG. Image A appears.

  As described above, by using the present invention, it becomes possible to effectively arrange a plurality of latent images using the difference in gloss.

  In the first to fourth embodiments described, the glossy convex shaped image lines and pixels are all applied by the screen printing method. However, there is a problem if the printing method or processing method can obtain the image lines and pixels having a certain height. There is no problem even if it is a system such as intaglio printing or embossing. In addition, the glossy convex image line can be formed by the offset printing method in the case of the two latent image switches described in the fifth embodiment. This technology can switch latent images as long as surfaces with different light reflection angles can be formed in a high-gloss image line, and if the angle difference is about 1 to 2 degrees, Switch. If a further effect is desired, it is desirable to use a functional material for the glossy convex pixel. It can be implemented more effectively by mixing pearl pigments with glossy convex pixels or using foamed ink. In particular, since the image line provided with the pearl pigment can add a very vivid hue expression in the diffusion region, the visibility of the latent image of the present invention can be further enhanced.

  In the embodiment, the low gloss image line is applied by the offset printing method, but it is needless to say that it can be implemented by any printing method such as a gravure printing method, a relief printing method, a flexographic printing method, or a screen printing method. A gloss difference is produced by changing the coating thickness of the image line as in the first embodiment. As described in the fourth embodiment, a method of partially removing the image line by laser irradiation, or a white color by a printer. It can be carried out by transferring the ink and generating a gloss difference such as a method of forming a portion having a different roughness of the pixel on the glossy convex pixel. When processing methods such as printing with a printer or laser irradiation are used, the image resolution of the latent image is often lowered due to the problem of processing accuracy, but unlike printing that requires plate making, a latent image is instantly added. There is an advantage that variable information such as a different number or face image can be given to each printed matter.

  In addition, in the case of a printing method capable of forming an energetic image line such as UV screen printing or intaglio printing, an ink having the same glossiness as a glossy convex image line is applied to a low-gloss image line serving as a latent image image line. Even if is used, a change occurs in the angle at which the light is specularly reflected due to the height difference of the image line, so that it is possible to generate a plurality of these latent images. However, even in this case, the effect is higher when the low-gloss ink is used than when the same high-gloss ink as that of the glossy convex line is used.

  In Example 2, the glossy convex line is a parallel line having a linear structure. However, as long as the printing accuracy can be maintained, there is no problem even if curves, dividing lines, circles, or combinations thereof are used. . In this case, for example, considering the configuration of the second embodiment, the latent image is divided by a width of 1 / n or less in the same shape such as a glossy convex image line, a curve formed by pixels, a dividing line, or a circle. They may be laminated on the glossy convex line.

  In the third embodiment, the pixel has a rectangular pixel shape, but it goes without saying that a polygon or a circle is also within the scope of the present invention. In addition, in order to reduce the difficulty of printing, the latent image line that extends beyond the glossy convex shape line and the glossy convex shape pixel by increasing the width of the image line and pixel that form the latent image, and is also stacked on the non-image area. A pixel configuration can be easily assumed and is within the scope of the present invention.

  In addition, by utilizing the fact that a transparent image line having a convex structure has a certain lens effect, an image line having a different color with a pitch is arranged under a glossy convex pixel so that the present invention Adding a change effect or providing an image change by arranging a divided image having a pitch under glossy convex pixels is a simple combination of the present invention and a known technique. Furthermore, the present invention in which an arbitrary image is formed with a high gloss ink having a solid color such as silver or gold, and a transparent image line formed thereon (transparent glossy convex image line and transparent latent image image line) ), It is easy to combine an image forming body in which only a high-gloss ink image is visually recognized in a diffuse reflection area and only a latent image is visually recognized in a regular reflection area as a combination of the present invention and a known technique. It is in a possible category.

  In any of the embodiments described so far, it is desirable from the viewpoint of visibility that the height of the glossy convex shape image line and the glossy convex shape pixel exceeds 10 μm. However, as shown in Example 5, if the number of latent images is limited to about 2 to 3, the present invention can be applied to an image line height of about 1 to 3 μm, which is an image line height obtained by offset printing. Can be implemented.

  Furthermore, in the printed matter according to claim 1 (Example 1) and claim 3, it is desirable that the difference between the height of the glossy convex image line and the height of the latent image line is 4 μm or more. The difference between the pixel height and the latent image pixel height is preferably 4 μm or more.

  Further, in the printed matter according to claim 2 (Example 2, Example 5) and claim 4 (Example 3), the difference between the glossiness of the glossy convex image line and the glossiness of the latent image line is 50. The difference between the glossiness of the glossy convex pixel and the glossiness of the latent image pixel is preferably 50 or more.

The image line structure of the latent image printed matter using the gloss difference in one Example of this invention, and its cross section are shown. The result of having confirmed the visibility by producing the latent image printed matter which utilized the gloss difference by changing the image line height of the latent image A and the latent image B from the level 1 to the level 9 in one Example of this invention. (A) shows the case where the latent image printed matter using the gloss difference in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant with respect to incident light, and (b) shows regular reflection. FIG. 5C shows a case where the incident light is tilted 5 degrees toward the incident light in the dominant environment, and FIG. 10C is inclined −5 degrees beyond the incident light in the environment where the regular reflection is dominant. Shows the case of observation. The drawing line structure of the colored convex image 5 in one Example of this invention is shown. 2 shows a detailed image line configuration of a latent image in the present invention. FIG. 2 shows image line configurations of a latent image line A, a latent image line D, and a latent image line E in a latent image A, a latent image B, and a latent image C according to an embodiment of the present invention. Results of changing the line width of a latent image in one embodiment of the present invention, changing the number of latent images associated therewith from level 1 to level 4 to produce a latent image printed material using a difference in gloss, and confirming the visibility Indicates. (A) shows the image line structure of the latent image printed matter using the gloss difference in one embodiment of the present invention, and (b) shows the cross section. (A) shows the case where the latent image printed matter using the gloss difference in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant with respect to incident light, and (b), (c) and (D) shows the case where it observes each inclining by a fixed angle with respect to the incident light in the environment where regular reflection is dominant. The figure which arranged the pixel of the colored glossy convex shape in one Example of this invention was shown. The pixel structure of the latent image pixel F, the latent image pixel G, the latent image pixel H, and the latent image pixel I in one Example of this invention is shown. 2 shows a pixel configuration of a latent image print using gloss difference in an embodiment of the present invention. (A) shows the case where the latent image printed matter using the gloss difference in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant with respect to incident light, and (b), (c), (D) and (e) show a case in which observation is performed at an angle with respect to incident light in an environment where specular reflection is dominant. 2 shows a pixel configuration of a latent image print using gloss difference in an embodiment of the present invention. The solid thing of the latent-image image in one Example of this invention is shown. 2 shows a detailed image line configuration of a latent image in the present invention. 2 shows a line configuration of latent image composite lines in a latent image A, a latent image B, a latent image C, a latent image D, and a latent image E according to an embodiment of the present invention. The image line structure of the latent image printed matter using the gloss difference in one Example of this invention, and its cross section are shown. 2 illustrates a line configuration of a latent image composite image line in a latent image A and a latent image B according to an embodiment of the present invention. (A) shows the case where the latent image printed matter using the gloss difference in one embodiment of the present invention is observed in an environment where diffuse reflection is dominant with respect to incident light, (b) and (c) A case where the observation is performed at an angle with respect to the incident light in an environment where specular reflection is dominant is shown.

Explanation of symbols

1 Latent image printed matter using gloss difference 2 Glossy convex line L
3 Latent image line A
4 Latent image line B
5 Colored convex image 6a, 6b Image line M of colored glossy convex shape
7 Latent image composite image 8 Latent image line C
9 Latent image line D
10 Latent image line E
11 Latent image printed matter 11a Colored glossy convex pixel N
12 Latent image pixel F
13 Latent image pixel G
14 Latent image pixel H
15 Latent image pixel I
16 Solid Object 17 Latent Image Composite Image 18 Image Line 19 Forming Latent Image Composite Image 19 Glossy Convex Image Line J
20 Latent image line constituting the latent image A 21 Latent image line constituting the latent image B

Claims (4)

On the base material, a plurality of convex gloss convex lines formed with high gloss ink are arranged with the same width and a predetermined pitch ,
The glossy convex image line is divided into n or more (n is an integer of 2 or more) regions in the width direction of each image line,
By providing a step in the surface layer in at least two of the n or more divided regions, at least two latent image lines that have a lower gloss than the surface gloss of the glossy convex image line are formed. , the latent image streak in the gloss convex streak the same pitch, and, by disposing parallel, Ri name at least two latent image is formed,
In the regular reflection light region, a difference in reflectance occurs between the surface layer of the glossy convex image line and the surface layer of the low-gloss latent image line, and the difference in reflectance causes a difference between the at least two latent image images. A latent image printed matter utilizing a gloss difference , wherein one of the at least two latent image images is switched and visually recognized according to a change in incident light angle . On the base material, a plurality of convex gloss convex lines formed with high gloss ink are arranged with the same width and a predetermined pitch ,
The glossy convex image line is divided into n or more (n is an integer of 2 or more) regions in the width direction of each image line,
In at least two regions on the glossy convex image line divided into n or more, an image of less than half of the glossy convex image line is formed with a low gloss ink having a lower gloss than the high gloss ink. a line width, and by at least two latent image streak formed in parallel with the glossy convex streak the same pitch, Ri Na are at least two latent image is formed,
In the regular reflection light region, a difference in reflectance occurs between the surface layer of the glossy convex image line and the surface layer of the low-gloss latent image line, and the difference in reflectance causes a difference between the at least two latent image images. A latent image printed matter utilizing a gloss difference , wherein one of the at least two latent image images is switched and visually recognized according to a change in incident light angle . On the base material, a plurality of convex gloss convex pixels formed with high gloss ink are arranged with the same area and a predetermined pitch ,
The glossy convex pixel is divided into n or more (n is an integer of 2 or more) regions,
By providing a step on the surface layer in at least two of the n or more divided regions, a plurality of latent image pixels having lower gloss than the gloss of the surface layer of the glossy convex pixel are formed, and the latent image pixel is formed. the image pixels in the gloss convex pixel the same pitch, and, by disposing regularly, Ri na at least two latent image is formed,
In the regular reflection light region, a difference in reflectance occurs between the surface layer of the glossy convex pixel and the surface layer of the low-gloss latent image pixel, and one of the at least two latent image images is caused by the difference in reflectance. A latent image printed matter utilizing a difference in gloss, characterized in that the at least two latent image images are viewed by switching according to a change in the angle of incident light that is visually recognized. On the base material, a plurality of convex gloss convex pixels formed with high gloss ink are arranged with the same area and a predetermined pitch ,
The glossy convex pixel is divided into n or more (n is an integer of 2 or more) regions,
With at least two regions on the glossy convex pixel divided into n or more, the pixel area is less than half of the glossy convex pixel by the low gloss ink having a lower gloss than the high gloss ink, And, at least two latent image images are formed by a plurality of latent image pixels regularly arranged at the same pitch as the glossy convex pixels,
In the regular reflection light region, a difference in reflectance occurs between the surface layer of the glossy convex pixel and the surface layer of the low-gloss latent image pixel, and one of the at least two latent image images is caused by the difference in reflectance. A latent image printed matter utilizing a difference in gloss, characterized in that the at least two latent image images are viewed by switching according to a change in the angle of incident light that is visually recognized.

Images