JP2010188538A - Printed matter with latent image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed matter with a latent image, in which ink containing a photoluminescent material is overlapped on the convex and concave formed on the base material to enable authentication of the latent image at a small observational degree. <P>SOLUTION: The printed matter with a latent image has, on its base material, a first image and an image area formed by overlapping a second image comprising an image different from the first image on the first image. The first image has a first area and a second area in the image area, and either of the first area or the second area is formed by arraying a plurality of first elements with a concave or convex shape onto the base material at a first pitch in a first direction. The second image is formed by a third area and a fourth area formed by arraying a plurality of second elements comprising a photoluminescent material with a color different from the base material and having different area rates respectively. The printed matter with the latent image is printed in such a manner that the second elements are overlapped in parallel on at least a portion of the first elements. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention forms a latent image having a concavo-convex structure on a base material, and overlays ink containing a glittering material on the latent image, so that the latent image appears with a slight change in the incident angle of light. The present invention relates to a latent image printed material.

  For printed matter that requires security, such as banknotes, securities, and postal tickets, it is indispensable to provide an authenticity discrimination element for distinguishing genuine products from counterfeit products in order to prevent forgery. Further, it is desirable that the authenticity determination element to be provided is an element that can be determined by any person using natural light without using a special tool.

  As an example of the authenticity determination element capable of determining authenticity with natural light, there are pearl printing, scratching, latent image pattern and the like applied to Bank of Japan. These are given as an element that allows the user to judge the authenticity visually when exchanging general articles and security prints such as face-to-face sales. However, there are various types such as those in which an image (latent image) that could not be observed appears, and those in which the color imparted to the image changes according to the observation angle as in pearl printing.

  Among these various types of authenticity determination elements, the latent image pattern formed by using the unevenness of the base material is not visible when viewed from the front, and the latent image pattern is hidden by tilting the base material. Since the image has the effect of appearing, it cannot be reproduced by color copying or simple duplication using a printer.

  The present applicant has applied for an invention related to a latent image printed material in which a latent image appears when the printed material is tilted by superimposing a printed image line with unevenness formed by crease, intaglio printing, embossing, etc. (for example, (See Patent Document 1 and Patent Document 2).

  A data carrier characterized by forming irregularities on a substrate and applying two coatings, a first coating and a second coating, on the substrate, the second coating having an optically variable structure. An application has been filed (for example, see Patent Document 3).

  In addition, a line-shaped first pattern printed with colored ink, a second pattern composed of uneven pixels, and a third pattern printed with ink visible only at a predetermined reflection angle are formed. Then, when the print surface is tilted and observed from the direction orthogonal to the first line of the first pattern, the third pattern and the second pattern have a latent image pattern in which the second pattern is visually recognized in ascending order of the observation angle of the print surface. A printed material has been filed (see Patent Document 4).

Japanese Patent No. 2615401 Japanese Patent No. 2600094 JP 2005-535485 gazette Japanese Patent No. 3789874

  The technology described in Patent Literature 1 and Patent Literature 2 is a technology for superimposing parallel print lines on the concavo-convex structure formed by scoring or intaglio printing, and the higher the concavo-convex height, The angle at which the latent image can be observed can be reduced. However, considering the distribution suitability and fastness of the printed matter, there is a limit to the height of the unevenness that can be formed on the substrate. When the printed matter is formed in consideration of these limitations, it must be tilted at least 70 degrees or more. Thus, it is impossible to observe the latent image.

  Therefore, in determining the authenticity of the security printed material to which the techniques described in Patent Document 1 and Patent Document 2 are applied, it is necessary to observe the printed material with a deep tilt in order to visually recognize the latent image. For this reason, since the operation of performing authenticity determination is increased, it is detected by the person who is present that the authenticity is determined. In face-to-face sales, banknotes handed in as a price need to be quickly checked for authenticity in front of the customer's eyes, but they learned that their banknotes are subject to authenticity determination. If the customer's image is not good. Therefore, it is considered that it is preferable that the authenticity determination itself can be performed with a subtle operation as much as possible, and there is a problem that the authentication angle of the latent image is deep.

  The techniques described in Patent Document 3 and Patent Document 4 are intended to reinforce the techniques described in Patent Document 1 and Patent Document 2, and the tilt angle reaches an angle at which a latent image due to unevenness can be observed. Up to this point, it is possible to complement the true / false discrimination function even at a shallow tilt angle by visually recognizing different images formed by an optically variable structure or ink that is visible only at a specific reflection angle. In this case, pearl ink, highly glossy ink, or the like is used as the optically variable structure or ink that is visible only at a specific reflection angle.

  An image formed with pearl ink, highly glossy ink, or the like can be visualized and color-changed by making light incident on the printed matter. Therefore, for authenticity determination, light may be incident on the printed material and tilted slightly, and the authentication angle in that case may be a shallow angle in many cases. As described above, the techniques described in Patent Document 3 and Patent Document 4 have a feature that it is not necessary to incline deeply in order to authenticate a latent image.

  However, these two techniques require the formation of the first pattern (or first coating) and the third pattern (or second coating) after forming the irregularities, with at least two different inks and It is necessary to form using two printing plates. In addition, even if the first pattern (or the first coating) is possible by offset printing, the optically variable structure that forms the third pattern (or the second coating) or only at a specific reflection angle. When it is desired to enhance the effect of the visually recognized ink, offset printing is often not sufficient, and it is desirable to use a gravure printing method, a screen printing method, or an intaglio printing method. From the above, the printing method itself for forming the first pattern (or the first coating) and the third pattern (or the second coating) often requires different printing methods.

  Therefore, the technique described in Patent Document 3 and Patent Document 4 needs to be formed by multi-color printing as compared with the technique described in Patent Document 1 and Patent Document 2, which causes a problem that the printing process becomes complicated. .

  From the above, with respect to the techniques described in Patent Document 1 and Patent Document 2, there is a problem that the authentication angle of the latent image formed with unevenness is too deep, and the techniques described in Patent Document 3 and Patent Document 4 are concerned. Although it is possible to authenticate different images formed with an optically variable structure at a shallow angle and an ink that is visible only at a specific reflection angle, there has been a problem that the printing process becomes complicated.

  The present invention aims to solve the above-mentioned problems. By forming an ink containing a glittering material on top of a latent image formed on a substrate, the projections and depressions are formed at a shallow observation angle. It is an object of the present invention to provide a latent image printed material capable of authenticating a latent image formed by the above method by a very simple and inexpensive method.

  The present invention has an image area in which a first image and a second image composed of an image different from the first image are superimposed on the first image on the substrate, and the first image Is formed by arranging a plurality of first elements having a concave shape or a convex shape with respect to the base material, and the second image is an area ratio formed by a glittering material having a color different from that of the base material. A latent image printed matter formed by arranging a plurality of second elements different from each other, wherein the second elements are printed in parallel with at least a part of the first elements. .

  The present invention has an image region on a base material and an image region in which a first image and a second image composed of an image different from the first image are superimposed on the first image. In the latent image printed matter in which the first image and the second image can be viewed by switching, the first image has a first region and a second region in the image region, and the first region or Either one of the second regions is formed by arranging a plurality of first elements having a concave shape or a convex shape with respect to the base material in the first direction at the first pitch, and the second image. Is composed of a third region and a fourth region, which are formed of a glitter material having a color different from that of the base material, and in which a plurality of second elements having different area ratios are arranged, and the third region and the fourth region The area ratio of the second element is 50% to the same direction as the first direction by the same pitch as the first pitch. Formed by a plurality of rows in the range of 0% to a second element, a latent image printed matter characterized in that printed superimposed in parallel to at least a portion of the first element.

  The present invention provides either a first region or a second region formed by arranging a plurality of first elements each having a concave shape or a convex shape with respect to a base material in a first direction at a first pitch. The region different from the one region is formed by arranging a plurality of first elements in a second direction different from the first direction at a second pitch that is the same as or different from the first pitch. Is a latent image printed matter obtained by superimposing and printing at least a part of the first element in a direction perpendicular to the first element or having an inclination of 1 to 89 degrees .

  The present invention is the latent image printed matter, wherein a difference in area ratio between the third region and the fourth region is 10% or more and 40% or less.

  The present invention is the latent image print, wherein the first element and / or the second element is an image line, a halftone dot group, or a pixel group.

  The present invention is the latent image printed matter, wherein the difference in area ratio is a difference in line widths of lines, a difference in area ratio of halftone dots, or a difference in area ratio of pixels.

  In the present invention, a region different from any one of the first region and the second region is a halftone dot or pixel forming either one region and a halftone dot or pixel having a different area ratio, or either one The latent image printed matter is characterized in that the halftone dots or pixels having the same area ratio as the halftone dots or pixels forming the area are arranged with a phase different from that of the halftone dots or pixels forming one of the areas.

  The present invention is an image in which the first image is formed of a concave shape formed by a watermark or embossing, a concavo-convex formed by either a transparent ink or a convex shape formed by substantially the same color as the base material. It is a latent image printed matter characterized by being.

  The present invention is the latent image printed matter, wherein the concave depth or the convex height in the first image is in the range of 1 μm to 50 μm.

  The present invention is a latent image printed material wherein the glittering material contains at least one of an iris pearl pigment, a scaly pigment, a scaly mica pigment, a scaly metal pigment, a glass flake pigment, and a cholesteric liquid crystal pigment. is there.

  Since the latent image printed material in the present invention is configured to cover a part of the uneven structure of the base material with ink containing a glittering material, the latent image printed material is formed with the uneven structure simply by applying fluorescent light or natural light to the latent image printed material. The latent image thus made is visualized, and the latent image can be visually recognized with almost no inclination.

  In addition, the latent image printed material in the present invention can be formed by a simple printing process without forming a concavo-convex structure on the surface of the base material and then requiring strict alignment for printing the glitter material. it can.

Plan view of latent image print 1 of the present invention The top view which shows the 1st image of the latent image printed matter 1 of this invention The top view which shows an example which forms the 1st image of the latent image printed matter 1 of this invention The top view which shows an example which forms the 1st image of the latent image printed matter 1 of this invention The top view which shows an example of the 1st image of the latent image printed matter 1 of this invention The top view which shows the 2nd image of the latent image printed matter 1 of this invention The top view which shows an example which forms the 2nd image of the latent image printed matter 1 of this invention The top view which shows embodiment of the latent image printed matter 1 of this invention Observation view of latent image print 1 of the present invention The top view which shows latent image printed matter 1 'of this invention The top view which shows the 1st image of latent image printed matter 1 'of this invention The top view which shows the 2nd image of latent image printed matter 1 'of this invention Four image elements obtained by dividing the latent image print 1 ′ of the present invention into layer structures Schematic diagram showing a graph showing the color difference for each light receiving angle in each image element and an observation angle region in which the image of the latent image print changes Observation view of latent image printed material 1 ′ of the present invention The top view which shows latent image printed matter 1 '' of this invention The top view which shows embodiment of latent image printed matter 1 '' of this invention Observation view of latent image print 1 ″ of the present invention The top view which shows latent image printed matter 1 "" of this invention The top view which shows embodiment of latent image printed matter 1 "" of this invention Observation view of the latent image print 1 ′ ″ according to the present invention. Plan view of the latent image print 1 ″ ″ ″ of the present invention. The top view which shows embodiment of latent image printed matter 1 '' '' 'of this invention. Observation view of the latent image print 1 ″ ″ ″ according to the present invention.

  The best mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the best mode for carrying out the invention described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims. .

  Fig.1 (a) is an example of the latent image printed matter (1) in this invention. As shown in FIG. 1 (a), the latent image print (1) has an image region (3) on a substrate (2). In addition, the image area (3) is formed in the first image (4) shown in FIG. 1 (b) formed by a concave or convex shape with respect to the substrate, and in FIG. 1 (c) formed by a glittering material. The second image (5) shown is formed by printing on the first image (4).

FIG. 2 is a diagram for explaining the first image (4). The first image (4) in this example is formed by arranging a plurality of _first elements (A ₁ ) with a _first pitch (P ₁ ) in the horizontal direction as the first direction in the image region (3). The first region (4a) made up of the alphabet “NIPPON” and the second region (4b) with a margin around the first region (4a). The first image (4) includes a concave line or a convex line, a concave halftone dot or a convex halftone dot and a concave pixel or a convex pixel (hereinafter referred to as “concave or convex shape”). It is only necessary to have at least one region formed by arranging a plurality of _first elements (A ₁ ) having a width (T _A1 ) composed of a single line, etc.). It can be formed due to a difference in thickness, line angle, and the like. Moreover, although this form has the 2nd area | region (4b) which consists of a margin around the 1st area | region (4a), as the contrary form, the 2nd area | region (4b) which consists of a margin A first region (4a) may be formed around the periphery. The concave depth or convex height of the concave or convex line is 1 μm or more and 50 μm or less. This is because when the concave depth or the convex height is less than 1 μm, it is difficult to visually recognize the first image. Moreover, it is because it becomes difficult to provide the ink which prints the 2nd image mentioned later when concave depth or convex height exceeds 50 micrometers.

Further, the concave or convex line that is the _first element (A ₁ ) forming the first image (4) can be formed on the base material or the base material itself. Convex lines, convex dots or convex pixels formed on the substrate are convex lines, convex shapes formed with ink or the like by a printing method such as intaglio printing or screen printing. Halftone dots or convex pixels. The concave lines, concave halftone dots, or concave pixels formed directly on the base material itself can be filled and embossed (base press work, laser processing technology such as YAG laser or carbon dioxide gas laser, etc.) Also included.) When forming convex lines, convex halftone dots, or convex pixels by a printing method such as intaglio printing or screen printing, the color is almost the same as transparent ink, translucent ink, or substrate. It is desirable that a convex line, a convex halftone dot, or a convex pixel be made invisible.

In this embodiment, the first region (4a) is formed by a concave line or a convex line with respect to the substrate, but the concave halftone dot or the convex halftone dot and the concave pixel or the convex shape. An example formed by these pixels will be described with reference to FIG. As shown in FIG. 3 (a), when forming with a concave halftone dot or a convex halftone dot, the first halftone dot (H _A1 ) is at a predetermined pitch (P) and in the same direction. The first halftone dot group (H ′ _A1 ) is formed by arranging a plurality of dots, and the first halftone dot group (H ′ _A1 ) is _defined as the first element (A ₁ ). A plurality of first elements (A ₁ ) as the first halftone dot group (H ′ _A1 ) are arranged in a horizontal direction at a predetermined pitch (P) as the first direction, and the first region (4a) Form. In addition, as shown in FIG. 3B, when the pixel is formed by a concave pixel or a convex pixel, a plurality of first pixels (P _A1 ) are arranged at a predetermined pitch (P) in the same direction. The first pixel group (P ′ _A1 ) is arranged to form the first pixel group (P ′ _A1 ) as the first element (A ₁ ). Then, a plurality of first elements (A ₁ ) that are first pixel groups (P ′ _A1 ) are arranged in a horizontal direction at a predetermined pitch (P) as a first direction, and a first region (4a) is formed. Form. As for the predetermined pitch (P) in the case of forming with halftone dots or pixels, the pitch is set so that the halftone dots or pixels do not overlap each other or the intervals between the halftone dots or pixels are not so large. adjust. This is because the visibility is lacking when they overlap or the interval becomes large.

Further, when the first region (4a) and the second region (4b) are formed in the first image (4) by halftone dots or pixels, as shown in FIG. The first halftone dot (H _A1 ) and the first halftone dot (H _A2 ) having different area ratios are used, and the first halftone dot (H _A1 ) and the first halftone dot (H _A2 ) are the same. And the first halftone dot group (H ′ _A1 ) in which a plurality of first halftone dots (H _A1 ) are arranged in the first direction (A ₁ ). The first halftone dot group (H ′ _A2 ) in which a plurality of first halftone dots (H _A2 ) are arranged is _defined as the first element (A ₂ ). Next, the first element (A ₁ ) composed of the first halftone dot group (H ′ _A1 ) and the first element (A ₂ ) composed of the first halftone dot group (H ′ _A2 ) are made identical to each other. A plurality of the first regions (4a) and the second regions (4b) are formed in the direction and at the same pitch (P). Further, when the pixel area ratio is different, the first pixel (E _A1 ) and the first pixel (E _A2 ) having different pixel area ratios are used as shown in FIG. 4B. Then, a plurality of first pixels (E _A1 ) and a plurality of first pixels (E _A2 ) are arranged in the same direction and at a predetermined pitch (P), and a plurality of first pixels (E _A1 ) are arranged. the arranged first pixel group (E 'the _A1) as the first element _{(a 1),} a first pixel group first pixel _{(E A2)} a plurality of arranged (E' the _A2) first element and _{(a 2).} Next, the first element (A ₁ ) composed of the first pixel group (E ′ _A1 ) and the first element (A ₂ ) composed of the first pixel group (E ′ _A2 ) are arranged in the same direction. In addition, the first region (4a) and the second region (4b) are respectively formed by arranging a plurality of them at the same pitch. Note that when pixels or halftone dots having the same area ratio are used for the first region (4a) and the second region (4b), the first region (4a) is formed by changing the phase of arranging the pixels or halftone dots. ) And the second region (4b).

  Next, as an example, the first region (4a) and the first region in the first image (4) in which the concave shape or the convex shape is formed by the presence or absence of the image line, the image line width is thick, or the image line angle is different. The second region (4b) will be described. For example, in FIG. 5A, a blank “NIPPON” character forms a second region (4b), and a vertical convex shape is formed as the first direction around the “NIPPON” character. This is an example in which a first region (4a) formed by arranging a plurality of image lines is formed. Unlike the embodiment shown in FIG. 2, the first region (4a) is formed around the character. In FIG. 5B, the character “NIPPON” formed by arranging a plurality of halftone dots having a convex shape in the vertical direction as the first direction is defined as the first region (4a), and the area around the character “NIPPON” This is an example in which a plurality of halftone dot groups convex in the horizontal direction are arranged to form the second region (4b). FIG. 5C shows a convex halftone dot group arranged in the vertical direction as the first direction to form the first area (4a) as the characters “NIPPON” and surrounding the second direction in the second direction. As an example formed by the second region (4b) formed by arranging a plurality of horizontal convex image lines. In FIG. 5D, the first region (4a) formed by arranging a plurality of convex halftone dots in the vertical direction as the first direction is formed by characters “NIPPON”, and the surrounding area is a blank space. A second region (4b) consisting of The first image (4) not only forms the second region (4b) around the first region (4a), but also the first region (4a) around the second region (4b). Can also be formed. Therefore, which one is used as the first region may be determined in consideration of the direction in which the second elements are arranged.

  The substrate (2) is not limited to paper, and may be any shape as long as irregularities such as a plastic card can be formed, and the substrate color is not limited to white.

The second image (5) shown in FIG. 6 (a) has two regions, a third region (5a) composed of “cherry blossoms” and a fourth region (5b) formed around “cherry blossoms”. have. The third region (5a) composed of “cherry blossoms” is formed by arranging a plurality of second elements (B ₁ ) having a _first pitch (P ₁ ) and an image line width (T _B1 ) in the first direction. is doing. On the other hand, the fourth region (5b) formed around the “cherry blossom” has the second element (B ₂ ) of the first pitch (P ₁ ) and the line width (T _B2 ) in the first direction. A plurality are arranged. As shown in the enlarged view of FIG. 6 (b), the third region (5a) and the fourth region (5b) are formed by arranging the second elements having different line widths at the same pitch and in the same direction. It is formed by arranging a plurality. In the present embodiment, the third region (5a) and the fourth region (5b) constitute a difference in area ratio due to a difference in image line width. It can also be configured by the difference in the area ratio.

For example, when it is configured by the difference in the halftone dot area ratio, as shown in FIG. 7A, the second halftone dot (H _B1 ) and the second halftone dot (H _B2 ), a plurality of second halftone dots (H _B1 ) and second halftone dots (H _B2 ) are arranged in the same direction and at a predetermined pitch (P). A second halftone dot group (H ′ _B1 ) in which a plurality of points (H _B1 ) are arranged is a second element (B ₁ ), and a second halftone dot group in which a plurality of second halftone dots (H _B2 ) are arranged Let (H ′ _B2 ) be the second element (B ₂ ). Next, the second element comprising a second halftone group (H 'second element consisting of _{B1) (B 1)} and the second halftone group _{(H' B2) (B 2} ), the same The third region (5a) and the fourth region (5b) are formed by arranging a plurality of the regions in the direction and at the same pitch (P). Further, when the pixel area ratio is different, the second pixel (E _B1 ) and the second pixel (E _B2 ) having different pixel area ratios are used as shown in FIG. 7B. A plurality of second pixels (E _B1 ) and a plurality of second pixels (E _B2 ) are arranged in the same direction and at a predetermined pitch (P), and a plurality of second pixels (E _B1 ) are arranged. the placed second pixel group (E 'the _B1) and a second element _{(B 1),} a second pixel group second pixels _{(E B2)} a plurality of arranged (E' the _B2) second element and _{(B 2).} Next, the second element comprising a second pixel group (E 'second element consisting of _{B1) (B 1)} and the second pixel group (E' _{B2) (B 2),} in the same direction In addition, a plurality of regions are arranged at the same pitch, and a third region (5a) and a fourth region (5b) are formed.

  As the ink for forming the second image (5), an ink containing a glittering material is used. The ink containing the glittering material may be metallic ink such as gold ink or silver ink or ink containing pearl pigment, scaly pigment, scaly mica, scaly metal pigment, glass flake pigment or cholesteric liquid crystal pigment. In the case where the first image (4) is configured as a significant image, it is desirable to use ink having an object color different from that of the substrate.

  Next, the case where the ink containing a pearl pigment is used will be described. The particle size of the pearl pigment is selected according to the printing method to be used, but is 1 μm to 50 μm, and preferably the average particle diameter is about 5 μm to 15 μm. In order to improve the orientation (leafing effect) of the scale pigment of the pearl pigment to be used, it is preferable to perform a treatment such that the pigment is oriented on the surface of an image having a bulge of 10 μm to 150 μm during printing. Specifically, for example, by performing surface treatment of the pigment such as water repellency and oil repellency treatment as described in JP-A-2001-106937, the pigment can be oriented on the surface of the image line of the printing portion. This makes it possible to make the interference color of pearl caused by specular reflection light appear more vividly.

  The printing method for forming the second image (5) on the first image (4) is not particularly limited, and is a known screen printing method, offset printing method, letterpress printing method, flexographic printing method, gravure printing method, It can be formed by an intaglio printing method or the like.

Fig.8 (a) is an example figure which forms the 2nd image (5) in this form on the 1st image (4), The 1st image (4) formed on the base material (2) The second image (5) was printed on the image of Fig. 8 (b) to form the latent image print (1) of the present invention. As shown in the enlarged view of FIG. 8B, the second image (5) formed on the first image (4) is the first element forming the first image (4). A line or the like of the second element (B ₁ ) that forms the second image is parallel to the first direction that is the arrangement direction of the concave or convex lines or the like (A ₁ ). An angle is given and it prints so that it may overlap at least one part of the concave or convex image line etc. which are the _1st elements (A1) which form the 1st field (4). The predetermined angle is 1 degree to 5 degrees. This is because the visibility of the latent image decreases when the angle is 5 degrees or more.

  FIG. 9 shows an observation view of the latent image printed material (1) of the present invention. FIG. 9A shows an image that can be viewed when observed in the observation angle region A, and only the second image (5) can be observed in this region. FIG. 9B shows an image that can be viewed when the latent image printed matter (1) in the observation angle region B is observed. In this region, only the first image (4) is displayed. It can be visually recognized. Moreover, also in the observation angle area | region D, the 1st image (4) shown in FIG.9 (b) can be visually recognized. The specific observation angles of the observation angle region A, the observation angle region B, the observation angle region C, and the observation angle region D described above will be described in detail later.

  Next, the principle of the latent image printed matter of the present invention in which only the second image is visually recognized at a specific observation angle and only the first image is visually recognized at another observation angle will be described. FIG. 10 shows another example of the latent image print (1 ') in the present invention. As shown in FIG. 10A, the latent image printed matter (1 ') has an image region (3') on the substrate (2 '). The image region (3 ′) includes the first image (4 ′) formed by the concave shape or the convex shape shown in FIG. 10B and the second image formed by the glittering material shown in FIG. It is formed by the image (5 ′).

FIG. 11 is the first image (4 ′) shown in FIG. As shown in FIG. 11A, the first image (4 ′) includes a first element (A) composed of concave lines having a pitch (P ₁ ), an image line width (T _A1 ), and a depth (s). ₁ ) are arranged in the horizontal direction as the first direction, and the first region (4′a) formed around “B”, the pitch (P ₁ ), the line width (T _A1 ), and the depth ( and a second region (4′b) composed of a letter “B” formed by arranging a plurality of first elements (A ₂ ) composed of concave lines of s) in the vertical direction as the second direction. ing. Further, as shown in the cross-sectional view of FIG. 11B, the line width, pitch and depth of the first region (4′a) and the second region (4′b) are the same, and the arrangement direction Only different. When forming the second region in the first image, the second region is different from the first direction in which the first element composed of a concave or convex line forming the first region is arranged. Formed by placing the first element. Arranging in a different direction means that the second element described later has a tilt of 1 to 89 degrees perpendicular to the second direction in which the first elements forming the second region are arranged. This is because the switch effect of the first region (4′a) is clarified by printing. In this example, the first region (4′a) and the second region (4′b) are formed by concave lines, but one of the images is formed by halftone dots or pixels. You can also In addition, when forming 1st area | region (4'a) and 2nd area | region (4'b) by the dot and pixel which have the same area ratio, 1st area | region (4'a) and 2nd area | region Since it is necessary to express the difference in the area (4′b), one of the areas is formed by shifting the arrangement positions (phases) of halftone dots and pixels.

FIG. 12 is the second image (5 ′) shown in FIG. The second image (5 ′) is formed by arranging the image line composed of the second element (B ₁ ) having the pitch (P ₁ ) and the image line width (T _B1 ) in the horizontal direction as the first direction. , A third region (5′a) composed of the alphabet “A” and an image line composed of a _second element (B ₂ ) having a pitch (P ₁ ) and an image line width (T _B2 ) are arranged in the horizontal direction. Thus, there are two regions of the fourth region (5′b) formed around “A”. As shown in the enlarged view, the third region (5′a) and the fourth region (5′b) are image lines in which image lines having different line widths are arranged at the same pitch and in the same direction. Formed by groups. In this example, the size of the image line width is image line width (T _B2 ) <image line width (T _B1 ), but image line width (T _B2 )> image line width (T _B1 ). May be. In this example, the third region (5′a) and the fourth region (5′b) are formed by concave lines, but one of the images is formed by halftone dots or pixels. You can also

(A), (b), (c), and (d) of FIG. 13 show the latent image printed material (1 ′) of the present invention, the region for forming the first image (4 ′), and the second image ( 5 ′) is divided into four image elements according to the difference of the overlapping areas. That is, the first image (4 ′) includes a first region (4′a) formed by a horizontal concave line and a second region (4 ′) formed by a vertical concave line. b), the second image (5 ′) is divided into a fourth region (5′b) formed by an image line having a line width (T _B2 ) made of a glitter material, and a glitter property. Divided into elements with the third region (5′a) formed by the image line width (T _B1 ) made of material, and the latent image print (1 ′) is divided into image element 1 to image element 4 Image. In the description of this image element, the main part is indicated by a solid line and the other part is indicated by a broken line.

Specifically, the image element 1 shown in FIG. 13A is an image composed of a second region (4′b) in which a concave image line is formed by vertical lines, and an ink containing a glittering material. The image element which consists of a 4th area | region (5'b) formed by the image line of line | wire width (T _B2 ) is shown. The image element 2 shown in FIG. 13B has an image line width (T) made of ink containing a glittering material on a first area (4′a) in which a concave image line is formed by horizontal lines. _B2 ) shows an image element composed of a portion where the fourth region (5′b) formed by the image line overlaps. An image element 3 shown in FIG. 13C has an image line width (T) made of ink containing a glittering material on a second region (4′b) in which a concave image line is formed by vertical lines. _B1 ) shows an image element composed of a portion where the third region (5'a) formed by the image line overlaps. The image element 4 shown in FIG. 13D has an image line width (T) made of ink containing a glittering material on a first area (4′a) in which a concave image line is formed by horizontal lines. _B1 ) shows an image element composed of a portion where the third region (5'a) formed by the image line overlaps.

In FIG. 14A, four 50 mm × 50 mm measurement patches having the same layer structure as those of the image elements 1 to 4 are manufactured, and light is irradiated to each image element at an incident angle of 45 °. L * a * b * at a light receiving angle of −20 ° to 80 ° is measured, and the color difference ΔE between the image element 2, the image element 3 and the image element 4 when the image element 1 is used as a reference is represented from the measured value. It is a graph. In this example, it is assumed that the second image (5) is formed on skin-quality fine paper using an ink containing the pearl ink shown in Table 1, and P ₁ = 0.4 mm, T _B1 = 0.25 mm, T _A measurement patch is formed with _B2 = 0.30 mm. Since the measurement values of these measurement patches represent the visibility of each image element shown in FIG. 13, it is possible to confirm from this graph the effect of the image switching when the light receiving angle changes. is there. As the measuring device, a variable angle spectrocolorimetric system GCMS-4 type (manufactured by Murakami Color Research Laboratory) was used.

  In order to explain the switch effect of an image using the graph of FIG. 14A, first, an observation angle region in this specification is defined with reference to FIG. FIG. 14B is a diagram showing the positional relationship among the latent image printed matter (1 '), the light source (9), and the observer's viewpoint (10). For example, when the angle of the observation viewpoint is changed from −30 ° to 80 ° when light is incident on the latent image printed matter (1 ′) from −45 °, the specular reflection light is almost in the observation angle region. From the region where the non-existing diffuse reflected light is dominant, the regular reflection light gradually begins to mix as the light receiving angle approaches 45 °. At the light receiving angle of 45 °, the regular reflection becomes the dominant region, and the light receiving angle of 45 °. As the size gradually increases, the region becomes a region where diffuse reflection light and regular reflection light enter again.

  Therefore, in this specification, the observation angle region in which the diffuse reflection light having a light reception angle of −30 ° to −10 ° is dominant is “observation angle region A”, and the regular reflection light having a light reception angle of 45 ° ± 20 ° is dominant. An observation angle region is defined as “observation angle region C”, and an observation angle region in which diffuse reflection light and regular reflection light with light reception angles of −10 ° to 25 ° and 65 ° to 70 ° are mixed is defined as “observation angle region B”. . In addition, the observation angle from 70 ° to 80 ° is originally an observation angle region in which diffuse reflection light and regular reflection light are mixed, but a latent image appears in the techniques described in Patent Document 1 and Patent Document 2. Therefore, this angle region is considered to be an observation angle with a particularly deep inclination, and is defined as “observation angle D” separately from the observation angle region B.

  In the graph of FIG. 14A, the data indicating the image element 2 is a polygonal line (6), the data indicating the image element 3 is a polygonal line (7), and the data indicating the image element 4 is a polygonal line (8). . The smaller the value of ΔE, the more difficult it is to distinguish from the image element 1, and it is visually recognized as an image of the same degree as the image element 1, and the larger the value of ΔE, the easier it is to distinguish from the image element 1. Indicates that it is visually recognized as a different image.

  First, in the observation angle region A of the color difference ΔE graph of FIG. 14, a polygonal line (7) that is data indicating the image element 3 and a polygonal line (data indicating the image element 4) with respect to the reference image element 1. The numerical value of 8) is large, and the numerical value of the broken line (6) which is data indicating the image element 2 is a relatively small value. In particular, when the angle is limited to a light reception angle of −30 °, the numerical values of the broken line (7) that is the data indicating the image element 3 and the broken line (8) that is the data indicating the image element 4 with respect to the reference image element 1 ΔE is about 7, and the numerical value of the broken line (6) that is data indicating the image element 2 is ΔE of 2 or less. Therefore, the image element 1 and the image element 2 are both visually recognized as substantially the same color, and the image element 3 and the image element 4 are both visually recognized as different colors from the image element 1 and the image element 2. As a result, the image element 1 and the image element 2 are combined to form the fourth area (5′b), and the image element 3 and the image element 4 are combined to form the third area (5′a). By being visually recognized, in the observation of the observation angle region A, only the second image (5) is visually recognized.

  Next, in the observation angle region B of the color difference ΔE graph in FIG. 14A, the data indicating the broken line (6) that is the data indicating the image element 2 and the image element 4 with respect to the image element 1 serving as the reference. The numerical value of the broken line (8) is large, and the numerical value of the broken line (7) which is data indicating the image element 3 is a relatively small value. In particular, when limited to an angle of 15 °, the numerical values of the broken line (6) that is the data indicating the image element 2 and the broken line (8) that is the data indicating the image element 4 with respect to the reference image element 1 are ΔE. Is 6 or more, and the numerical value of the broken line (7), which is data indicating the image element 3, has ΔE of 1 or less. Therefore, the image element 1 and the image element 3 are both visually recognized as substantially the same color, and the image element 2 and the image element 4 are both visually recognized as different colors from the image element 1 and the image element 3. As a result, the image element 1 and the image element 3 are combined to form the first area (4′a), and the image element 2 and the image element 4 are combined to be visually recognized as the second area (4′b). Thus, in the observation of the observation angle region B, only the first image (4 ′) is visually recognized.

  Finally, in the observation angle region D of the graph of color difference ΔE in FIG. 14A, the data indicating the broken line (6) that is the data indicating the image element 2 and the image element 3 with respect to the reference image element 1. The numerical value of the broken line (8) is large, and the numerical value of the broken line (7) which is data indicating the image element 3 is a relatively small value. Therefore, only the first image (4 ') is visually recognized as in the observation angle region B. In this region, since the printed material is inclined and observed, the uneven structure of the base material conceals or emphasizes the printed image line as in the techniques described in Patent Document 1 and Patent Document 2. The first image (4 ′) appears more strongly.

  As described above, in the latent image printed material (1 ′) of the present invention, the color difference in each observation angle region of the four image elements changes greatly, and an image visually recognized in the image region (3 ′) by the observation angle region. It will change. Specifically, the second image is viewed in the observation angle region A, and the first image in the observation angle region B is visually recognized by the viewer. In the observation angle region D, the uneven structure of the base material has an effect of concealing or emphasizing the printed image line as in the conventional techniques described in Patent Document 1 and Patent Document 2, and the second image is added. Only is more visible.

  In order to determine the authenticity of the latent image printed material (1 ') of the present invention, it is only necessary to confirm that the first image (4') and the second image (5 ') are switched. For example, in an environment where there is light incident from an angle of −45 °, the boundary between the observation angle region A and the observation angle region B where the first image (4 ′) and the second image (5 ′) are switched is It is −10 °, and it is only necessary to slightly tilt the latent image printed material (1 ′) from the state of facing the front. Therefore, similarly to the techniques described in Patent Document 3 and Patent Document 4, not only can the first image (4 ′) formed by unevenness such as clearance and embossing be seen with a very shallow angle change, Since the so-called switch effect in which the second image (5 ′) disappears at the same time can also be seen at the same time, the printed matter is very excellent in authenticity as compared with the conventional technique.

  Further, the third region (5′a) and the fourth region (5′b) of the second image (5 ′) are both visibility of the first image (4 ′) in the observation angle region B. In order to increase the thickness, it is formed with an area ratio of 50% or more. Further, in order to make the first image visible in the observation angle region D, it should not be solid (area ratio 100%), and is 90% or less in consideration of dot gain at the time of printing. Therefore, the second image is formed with an area ratio of 50% or more and 90% or less in order to exhibit the switching effect at an extremely shallow angle, and the difference of the area ratio between the third region and the fourth region is 10% or more. It is desirable to form with 40% or less. This is because the switch effect becomes clearer when the area ratio difference is 10% or more and 40% or less. In addition, the area ratio in this specification means the conditions which expressed the ratio of the printed image etc. which can coat | cover the foundation | substrates, such as a base material, in% in the printed image etc. which have a fixed area on a base material.

  When observed at an angle at which light is not directly incident on the latent image print (1 ′) (an angle in which diffusely reflected light is dominant), as shown in FIG. 15A, only the second image (5 ′). Can be visually recognized. When observed at an angle at which light slightly enters the latent image printed matter (1 ′) (region where diffuse reflection light and regular reflection light are mixed), as shown in FIGS. 15B and 15C. It can be confirmed that only the first image (4 ′) can be visually recognized with the negative / positive reversal according to a slight change in the observation angle. When the second image (5) is formed using an ink containing the pearl ink shown in Table 1, not only a negative / positive reversal of the image but also a hue change due to the pearl interference effect is added. That is, in the first image (4 ′) of FIG. 15B and FIG. 15C, in the portion painted black, the gold color that is the interference color of the pearl pigment is strongly recognized, and the portion painted white is Blue, which is the object color of the colored pigment, is strongly visible. Further, when the latent image print (1 ′) is observed at an extremely deep observation angle of about 70 ° to 80 °, the concavo-convex structure of the substrate is printed in the same manner as the techniques described in Patent Document 1 and Patent Document 2. The effect of hiding or emphasizing the line is added, and the second image (5 ′) can be visually recognized as shown in FIGS. 14 (b) and 14 (c). As described above, the effect of switching between the first image (4 ') and the second image (5') can be confirmed according to the observation angle.

  First, a first image (4 ″) is formed by using a concave line formed by scoring as a first element, and a second image (5 ″) is formed by using a line by screen printing as a second element. The formed latent image print (1 ″) will be described. FIG. 16 shows a latent image print (1 ″) according to an embodiment of the present invention. As shown in FIG. 16A, the latent image printed matter (1 ″) has an image region (3 ″) on a base material (2 ″) that is skin-quality fine paper. The image area (3 ″) includes a first image (4 ″) composed of characters “JAPAN” formed by a horizontal group of lines as a first direction, and a second image composed of “sakura”. The image (5 ″) is laminated on the first image (4 ″).

As shown in FIG. 16B, the first image (4 ″) was formed only by the first region (4 ″ a) consisting of the characters “JAPAN”. The letter “JAPAN” uses the first element (A ″ ₁ ) as a concave line formed by the insertion of a pitch of 0.5 mm, an image line width of 0.25 mm, and a depth of 40 μm. A plurality of _first elements (A ″ ₁ ) are arranged in the horizontal direction.

As shown in FIG. 16C, the second image (5 ″) includes a third region (5 ″ a) composed of “sakura” and a fourth region that forms the periphery of “sakura”. (5 ″ b). The third area (5 ″ a) made up of “cherry blossoms” uses the second element (B ″ ₁ ) made up of lines with an image line pitch of 0.5 mm and an image line width of 0.35 mm. As the first direction, a plurality of second elements (B ″ ₁ ) are arranged in the horizontal direction. On the other hand, the fourth region (5 ″ b) uses a second element (B ″ ₂ ) composed of a single line having an image line pitch of 0.5 mm and an image line width of 0.25 mm, and the first direction And a plurality of _second elements (B ″ ₂ ) are arranged in the horizontal direction. The second image (5 ″) is a first line that forms the first image (4 ″) as shown in FIG. 17A by screen printing using the ink shown in Table 1. The second line (B ″ ₁ , B ″ ₂ ) forming the second image (5 ″) so as to overlap in parallel with at least a part of the element (A ″ ₁ ) Printing was performed to obtain a latent image print (1 ″) shown in FIG.

  FIG. 18 shows the effect when the latent image printed matter (1 ″) in this embodiment is observed. FIG. 18A shows an image that can be seen when observed in the observation angle region A, and only the second image (5 ″) can be observed in this region. FIG. 18B shows an image that can be visually recognized when the latent image printed material (1 ″) is observed in the observation angle region B. In this region, the first image (4 ′) is shown. ') I was able to see only. Further, in the observation angle region D, the first image (4 ″) shown in FIG. As described above, it was confirmed that the latent image printed material (1 ″) in this example has an effect of switching an image by a slight change in the observation angle. In the case of the first embodiment, the positive / negative reversal effect of the first image in the observation angle region B as shown in FIG. 15 is lost, but the first image (4 ″) is visually recognized as a negative image. The first image (4 ′) may have a relatively simple configuration.

  Next, the first image (4) is formed on the base material by screen printing using the convex image line as the first element, and the image line by offset printing is used as the second image (5) as the second element. An example of the latent image printed matter printed on the first image (4) will be described.

  FIG. 19 shows a latent image print (1 "") according to an embodiment of the present invention. The latent image print (1 "") has an image area (3 "") on a substrate (2 "") that is white coated paper. As shown in FIG. 19A, the image area (3 ′ ″) includes the first image (4 ′ ″) and the second image printed on the first image (4 ′ ″). (5 '' ').

A first image (4 ′ ″) shown in FIG. 19B includes a first area (4 ′ ″ a) made up of characters “JP” and a second image formed around “JP”. It consists of region (4 '''b). The first region (4 ′ ″ a) is a first element (A ′ ″ ₁ ) composed of a convex image line having a pitch of 0.5 mm, an image line width of 0.25 mm, and an image line height of about 10 μm. And the letters “JP” formed by arranging a plurality of _first elements (A ′ ″ ₁ ) in the vertical direction as the first direction. The second region (4 '''b), the pitch 0.5 mm, streaked width 0.25 mm, a first element consisting of streaking of the convex shape of the streaked height of about 10μm _(A' '' 2) And a second region (4 ″) formed by arranging a plurality of first elements (A ′ ″ ₂ ) in a _second direction inclined to the right by about 2 degrees with respect to the first direction. 'b). In addition, a white portion having an image line width of 0.2 mm is provided at the boundary between “JP” and the surrounding area. This first image (4 ′ ″) is transparent screen ink (UV curable Reicure OP, manufactured by Jujo Chemical Co., Ltd.) on a white coated paper substrate (2 ′ ″) by UV screen printing. Formed using. The white portion formed around “JP” includes the first element (A ″ ′ ₁ ) and the second region (4 ″) forming the first region (4 ′ ″ a). The difference in the arrangement direction of the first elements (A ''' ₂ ) forming' b) is 2 degrees, and is provided in order to clarify the letters “JP” by providing an outline, It is not an essential requirement of the present invention.

A second image (5 ′ ″) shown in FIG. 19 (c) has a third region (5 ′ ″ a) that constitutes the cherry petals and a fourth region (5 ″ formed around the third region (5 ′ ″ a)). 'b). The third region (5 ′ ″ a) uses a second element (B ′ ″ ₁ ) composed of a line having an image line pitch of 0.5 mm and an image line width of 0.30 mm, and has a first direction. And a plurality of second elements (B ′ ″ ₁ ) are arranged in the vertical direction. The fourth region (5 ′ ″ b) uses a second element (B ′ ″ ₂ ) made up of lines with an image line pitch of 0.5 mm and an image line width of 0.20 mm, and has a first direction. And a plurality of _second elements (B ′ ″ ₂ ) are arranged in the vertical direction. As shown in FIG. 20A, the second image (5 ′ ″) includes at least one of the first elements (A ′ ″ ₁ ) forming the first region (4 ′ ″ a). The second element (B ′ ″ ₁ ) forming the third region (5 ′ ″ a) and the second region (5 ′ ″ b) forming the fourth region (5 ′ ″ b) so as to overlap in parallel with the portion Print the element (B ′ ″ ₂ ) and at least partly from 0 to 5 degrees with respect to the first element (A ′ ″ ₂ ) forming the second region (4 ′ ″ b) A second element (B ′ ″ ₁ ) that forms the third region (5 ′ ″ a) and a second region (5 ′ ″ b) that forms the fourth region (5 ′ ″ b) so as to overlap with each other. Element (B ′ ″ ₂ ) was printed. The ink is a gold metallic gloss ink (UV Gold MG (red mouth) manufactured by T & K TOKA). ') Was printed to obtain a latent image print (1''') shown in FIG.

  FIG. 21 shows the effect of observing the latent image print (1 ′ ″) in this example. FIG. 21A shows an image that can be seen when the latent image printed material (1 ′ ″) in the present embodiment is observed in the observation angle region A, and only the second image (5 ′ ″). Was able to be observed. FIG. 21B shows an image that can be seen when the latent image printed material (1 ′ ″) in the present embodiment is observed in the observation angle region B, and shows the first image (4 ′ ″). ) Only. Further, in the observation angle region D, the first image (4 ′ ″) could be visually recognized as shown in FIG. As described above, it was confirmed that the latent image printed material (1 ″ ″) in this example has an effect of switching an image by a slight change in the observation angle.

FIG. 22A shows a latent image print (1 ″ ″) according to an embodiment of the present invention. The latent image print (1 ″ ″) in Example 3 has an image area (3 ″ ″) on a base material (2 ″ ″) that is a high-quality paper having a thickness of about 100 μm. . The image area (3 ″ ″) includes a first image (4 ″ ″) formed by a concave shape by a watermark and a second image (5 ″ ″ formed by a glitter material). ) Overlaid on the first image (4 ″ ″). As shown in FIG. 22 (b), the first image (4 ″ ″) by the insertion in this example includes a first region (4 ″ ″ a) composed of “marks” and “marks”. ”In the second region (4 ″ ″ b) formed around. The first region (4 ″ ″ a) uses a concave line having a pitch of 0.5 mm, a line width of 0.2 mm, and a depth of about 40 μm as the first element (A ″ ″ ₁ ), As the first direction, a plurality of first elements (A ″ ″ ₁ ) are arranged in the horizontal direction. On the other hand, in the second region (4 ″ ″ b), a concave line having a pitch of 0.5 mm, an image line width of 0.2 mm, and a depth of about 40 μm is formed as the first element (A ″ ″ ₂ ). As a second direction, a plurality of first elements (A ″ ″ ₂ ) are arranged in the vertical direction and formed around the “mark”.

Further, as shown in FIG. 22C, the second image (5 ″ ″) includes a third region (5 ″ ″ a) and a fourth region portion (5 ″ ″). b). The third area (5 ″ ″ a) uses an image line having a pitch of 0.4 mm and an image line width of 0.30 mm as the second element (B ″ ″ ₁ ), and the first direction is A plurality of second elements (B ″ ″ ₁ ) are arranged in the horizontal direction to form “print” characters. On the other hand, the fourth area (5 ″ ″ b) is the same as the third area (5 ″ ″ a) in that the image line having the same pitch of 0.4 mm and the image line width of 0.25 mm is the second area. _'use as _(2, in the horizontal direction as the first direction the second element (B element B''')'was formed by a'_{'' 2)} a plurality of arranged around the "printing".

As shown in FIG. 23 (a), the printing of the second image (5 ″ ″) on the first image (4 ″ ″) involves printing the first region (4 ″ ″ a). The second element (B ″ ″ ₁ ) that forms the third region (5 ″ ″ a) so as to overlap in parallel with at least a part of the first element (A ″ ″ ₁ ) to be formed ) and 'second element (B to form a b)' a ''_'2) to print the fourth region (5''', the first to form a second region (4 '''' b) The _second region (5 ″ ″ a) is formed so as to be perpendicular to or at least partially tilted from 6 ° to 89 ° with respect to the element (A ″ ″ ₂ ) of the _second region (5 ″ ″ a). element (B '''printed second elements forming _a' and ₁₎ the fourth region (5 '''' b) the (B ''_{'' 2).} The ink for printing the second image (5 ″ ″) uses the ink shown in Table 2 and is printed by a solvent-drying type screen printing method, as shown in FIG. (1 '''') was formed. The ink shown in Table 1 is an ink formed by mixing a blue colored pigment and a pearl pigment that emits a gold interference color. The object color is blue, but the gold interference color is reflected during regular reflection. It has a feature that is extremely excellent in color tone change.

  FIG. 24 shows the effect of observing the latent image printed material (1 '' '' ') in this example. FIG. 24A shows an image that can be viewed when the latent image printed material (1 ″ ″) in the present embodiment is observed in the observation angle region A, and the second image (5 ″ ″). Only). FIG. 24B shows an image that can be seen when the latent image printed material (1 ″ ″) in the present embodiment is observed in the observation angle region B, and shows the first image (4 ″). '') Only visible. Also in the observation angle region D, the first image (4 '' '' ') could be visually recognized as shown in FIG. As described above, it was confirmed that the latent image printed material (1 '' '') in this example has an effect of switching an image by a slight change in the observation angle.

1, 1 ′, 1 ″, 1 ′ ″, 1 ″ ″ Printed latent image 2, 2 ′, 2 ″, 2 ′ ″, 2 ″ ″ Base material 3, 3 ′, 3 ′ ', 3''', 3 '''' Image region 4, 4 ', 4'',4''', 4 '''' First image 4a, 4'a, 4''a, 4 ''' a, 4 '''' a first region 4b, 4'b, 4''b, 4 '''b,4''''b second region 5, 5', 5 '', 5 ''',5''''second image 5a, 5'a, 5''a, 5''' a, 5 '''' a third region 5b, 5'b, 5 '' b, 5 ′ ″ b, 5 ″ ″ b Fourth region 6 Color difference for each light receiving angle of image element 2 when image element 1 is used as a reference 7 Image element 3 when image element 1 is used as a reference Color difference 8 for each light receiving angle 8 color difference 9 for each light receiving angle of image element 4 with reference to image element 1 Light source 10 Observer A First element B Second element

Claims (10)

On the substrate, an image area in which a first image and a second image composed of an image different from the first image are superimposed on the first image are arranged,
The first image is formed by arranging a plurality of first elements having a concave shape or a convex shape with respect to the base material,
The second image is formed by arranging a plurality of second elements having different area ratios within the same predetermined range formed by a glittering material having a color different from that of the substrate.
The latent image printed matter, wherein the second element is printed with being overlapped in parallel with at least a part of the first element. The first image has a first region and a second region in the image region, and either the first region or the second region has a concave shape with respect to the base material. Or formed by arranging a plurality of first elements having a convex shape in the first direction at a first pitch,
The second image is composed of a third region and a fourth region in which a plurality of second elements having different area ratios are formed from a glittering material having a color different from that of the base material,
In the third region and the fourth region, the second element is arranged in the same direction as the first direction with an area ratio of 50% to 90% in the same direction as the first direction. Formed with multiple arrays,
The latent image printed matter according to claim 1, wherein the second element is printed by being overlapped in parallel with at least a part of the first element. The region different from any one of the first region and the second region is formed in the second direction different from the first direction by a second pitch that is the same as or different from the first pitch. Formed by arranging a plurality of one element,
The second element is printed perpendicularly with respect to the first element or with an inclination of 1 to 89 degrees so as to be overlapped in parallel with at least a part of the first element. The latent image printed matter according to claim 1, wherein: 4. The latent image printed material according to claim 1, wherein a difference in area ratio between the third region and the fourth region is 10% or more and 40% or less. 5. The latent image printed matter according to claim 1, wherein the first element and / or the second element is an image line, a halftone dot group, or a pixel group. The latent area difference according to any one of claims 1 to 5, wherein the difference in area ratio is a difference in line width of a line, a difference in area ratio of halftone dots, or a difference in area ratio of pixels. Printed image. A region different from any one of the first region and the second region is a halftone dot or pixel having a different area ratio from the halftone dot or pixel forming the any one region, or any one of the above. 7. A halftone dot or pixel having the same area ratio as that of a halftone dot or pixel forming a region is arranged with a phase different from that of the halftone dot or pixel forming one of the regions. The latent image printed material according to any one of the above. The concave shape of the first element is formed by watermarking or embossing, and the convex shape of the first element is a convex shape formed by transparent ink or ink of the same color as the base material. The latent image printed matter according to any one of claims 1 to 7. The latent image printed matter according to any one of claims 1 to 8, wherein a concave depth or a convex height of the first element is in a range of 1 µm to 50 µm. 10. The brilliant material includes at least one of an iris pearl pigment, a scaly pigment, a scaly mica pigment, a scaly metal pigment, a glass flake pigment, or a cholesteric liquid crystal pigment. The latent image printed matter according to claim 1.

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