JP2015100977A - Latent image printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide latent image printed matter having such properties that even when a dynamic effect of a latent image shows unintentional behavior such as disappearance or appearance which is different from designed behavior, the printed matter reduces a discomfort feeling and makes the image visible.SOLUTION: A second print layer is laminated on a first print layer on at least a part of a substrate. The first print layer includes a semicylindrical element group having a raised part and at least one property of a light-dark flip-flop property and a color flip-flop property under specular reflection light. In the second print layer, an IP (integral photography) picture line group and a camouflage picture line group, described below, are alternately arranged in a first direction without overlapping. The IP picture line group comprises a plurality of IP picture lines arranged, which are obtained by dividing a basic image having a different hue from a hue of the semicylindrical element under specular reflection light and then compressing, and each of which has a different shape from others; and the camouflage picture line group comprises a plurality of camouflage picture lines arranged, which are obtained by dividing camouflage information of an image different from the basic image.

Description

  In the field of valuable printed matter such as banknotes, passports, securities, identification cards, cards, and passports, which are security printed matters requiring anti-counterfeiting effects, the present invention The present invention relates to a latent image printed material that changes greatly in color and appears to move.

  Security printed matter typified by banknotes, passports, securities, identification cards, and the like requires anti-counterfeiting technology in order to prevent duplication and forgery. Further, among anti-counterfeiting techniques, there is a special need for anti-counterfeiting techniques that can be used for authenticity discrimination by all persons who have a printed material without using tools such as watermarks and holograms.

  Among these, anti-counterfeiting technology having a so-called “moving visual effect” in which an image appears to move is particularly attracting attention. The visual effect of moving images that appear to move (hereinafter referred to as “moving image effects”) is easy to attract attention and difficult to counterfeit. It tends to be. There are technologies that use holograms, parallax barriers, lenticulars, etc., as well-known technologies that can realize the moving image effect, and these technologies provide the ability to change images with slight angle changes, making the images three-dimensional. There are already widespread security prints that can be visually recognized and have a moving image effect.

  However, when a moving effect is achieved using a general parallax barrier or lenticular, a clear layer or lens is required, so the base material is almost limited to plastic, and the printed material has a certain thickness ( At least about 150 μm), which exceeds the thickness allowed for generally distributed printed matter, and cannot be used for printed matter with a limited thickness, and cannot be used except for plastic cards that allow a certain thickness. There is a tendency. In addition, holograms can be finished very thin and are used for various security prints such as banknotes. However, compared with general prints, there are major problems in the complexity of the manufacturing process and high manufacturing costs. .

  In order to solve the above problems, the present applicant, when light is incident on a bowl-shaped image line having high gloss and swell, determines the incident light and normal line of the ridge-shaped image line having a bulge. An application has already been filed for a printing technique capable of forming a three-dimensional effect and a moving image effect using a phenomenon in which only the surface to be formed reflects light strongly. The technique described in Patent Document 1 is an image obtained by image processing that is obtained by a stereoscopic image capturing method called integral photography, and is a technique capable of realizing excellent moving image effects similar to the technique described in Patent Document 1. It is. These technologies can be formed with a thickness of about one-tenth that of a parallax barrier or lenticular, and the manufacturing technology can be easily implemented by utilizing conventional plate making technology and printing technology. In addition, it has an excellent feature that a printed image having a moving image effect can be formed at the same cost as a general printed matter.

JP 2011-126028 A

  The technology of Patent Document 1 has a characteristic of strongly regularly reflecting incident light, and divides a base image on a ridge-like image line group formed of ridge-like image lines and pixels having a bulge, This is a technology that forms a compressed latent image line group (IP line group as referred to in the present invention) in an overlapping manner, and the saddle-shaped line group and the latent image line group interfere under regular reflection light. In this technique, the base image appears as a latent image, and the base image appears to move by changing the inclination of the printed matter. This technology is particularly excellent in moving image effects, and the base image that appears is characterized by continuous and smooth movement. On the other hand, the position of the superposition of the saddle-like image line group and the latent image line group Is formed out of the proper position, the phase of the base image that appears is suddenly changed from a specific position to a completely different position (hereinafter, this phenomenon is referred to as “jump” in the present specification). There was a problem that the phenomenon occurred and caused the observer to feel uncomfortable.

  This problem will be specifically described below. FIG. 27 is a diagram showing the movement of the base image under specular reflection light when the positional relationship of the superposition of the saddle-like image line group and the latent image line group is appropriate. In the example of FIG. 27, a part of continuous image information in which the base image moves in the A → B → C direction in order from the A side end to the A ′ side end of each latent image line is given. Yes. In the technique of Patent Document 1, the base image is visualized by partially sampling the image information of the latent image line, and the position where the image information of the latent image line is sampled is changed by changing the tilt. The phase of the base image that appears thereby changes. Therefore, as shown in FIG. 27 (a), when an appropriate superposition positional relationship in which one latent image line corresponds to a pair of saddle-shaped lines is configured, When the inclination of the latent image printed matter is changed from FIG. 27 (b) to FIG. 27 (d), the position where the image information of each latent image line is sampled is a saddle-shaped image. Since the image moves from the A side of the latent image line to the A ′ side of the latent image line along the rise of the surface of the line, the base image reproduced as a result corresponds to each image information from A to B. After that, move to the position of C in the same left (A ′ → A) direction. This is an example of the most desirable way to move the base image of this technique.

  On the other hand, FIG. 28 is a diagram showing the movement of the base image under specular reflection when the positional relationship of the overlay of the saddle-like image line group and the latent image line group deviates from an appropriate state. is there. In the example of FIG. 28 as well, as in the example of FIG. 27, continuous image information in which the base image moves in the direction of A → B → C in order from the A side end to the A ′ side end of each latent image line. A part of is granted. However, unlike the case of FIG. 27A, the example of FIG. 28A has a positional relationship in which two other latent image lines are arranged with respect to one saddle-shaped line. When the inclination of this latent image printed material is changed from FIG. 28B to FIG. 28C and to FIG. 28D, the position where each latent image line is sampled is However, since two other latent image lines are arranged on the surface of the saddle-shaped image line, first, the side of the A-line of the saddle-shaped image line is changed. Information on the latent image superimposed on the surface of the image line is reproduced, and information on another latent image superimposed on the surface of the image line on the A ′ side of the saddle-shaped image line is reproduced with a blank interposed therebetween. For this reason, the base image first appears at the position C, moves slightly to the left, and then disappears completely, and then appears again at the position A. This is a phenomenon called “jump”, and occurs when two other latent image lines overlap with one appropriate saddle-shaped line.

  In order to avoid this “jump” phenomenon, it is necessary to control the printing so that the saddle image line group and the latent image line group overlap each other. In this case, it is difficult to accurately align the saddle-like image line group and the latent image line group, and the “jump” phenomenon is completely eliminated. It was difficult to eliminate them. Therefore, in order to reduce the uncomfortable feeling caused by the “jump” phenomenon, an image configuration called “scattering pattern” in which a plurality of the same base images are arranged in different locations in the latent image line group, and each of them is used. Slightly shift the phase of the base image in the first direction, and even if a “jump” occurs in any of the base images, the other base images create a state that is not “jumped”. It has been common to use a configuration that reduces the sense of discomfort with “jump” by showing the effect of moving the base image. However, in this “scatter pattern” configuration, it is necessary to arrange a plurality of base images in the print image, and a large area is required as the print image, which may be a great limitation in product design.

  An object of the present invention is to solve the above-described problem, and an observer recognizes a “jump” phenomenon with the aim of reducing a sense of incongruity due to a “jump” phenomenon of a base image appearing under specular reflection light. It is an object to propose a latent image printed matter that is difficult to perform.

  The latent image printed matter of the present invention includes a print image area on at least a part of a substrate, and the print image area is formed by laminating a second print layer on the first print layer. The layer has a bowl-like shape in which a plurality of bowl-shaped elements having a bulge having at least one of light / dark flip-flop characteristics and color flip-flop characteristics under regular reflection light are arranged at a first pitch in a first direction. The second printed layer has an IP line group and a camouflage line group having a color different from the color under the regular reflection light of the bowl-shaped element. The camouflage image group is a camouflage image obtained by dividing camouflage image information of an image different from the base image. Line in the first direction When the IP image group and camouflage image group are arranged without overlapping each other in the first direction and observed at a specific observation angle under specular reflection light When the base image appears, the camouflage information appears when the base image disappears while the base image is dynamically viewed when the observation angle is changed within the range of the regular reflection light region. .

  The latent image printed matter of the present invention includes a print image area on at least a part of a substrate, and the print image area is formed by laminating a second print layer on the first print layer. The layer is formed by a pixel-like curved element having a bulge having at least one of a light-dark flip-flop property and a color flip-flop property under specular reflection light and intersecting the first direction and the first direction. A plurality of checkered elements arranged in a checkered pattern in two directions, and adjacent hook elements adjacent to each other in the first direction are adjacent to the hook elements adjacent to each other in the first direction. The phase of the center in the first direction between and the phase of the center in the first direction of the saddle-shaped elements adjacent in the oblique direction coincide with each other, and Adjacent saddle elements overlap in the first direction The hook-shaped elements diagonally adjacent to each other are arranged at a first pitch shifted in the first direction, and the first pitch is equal to or less than the length of the hook-shaped elements in the first direction. The second printed layer has an IP line group and a camouflage line group having a color different from the color under the regular reflection light of the bowl-shaped element, and the IP line group includes a base image. A plurality of IP lines having different shapes, which are divided and compressed, are arranged in the first direction at a first pitch, and the camouflage line group is composed of camouflage lines obtained by dividing the camouflage information of an image different from the base image. A plurality of IP lines and camouflage lines are arranged in the first direction without overlapping each other in the first direction, and a specific observation angle under specular reflection light. When observing with, the base image appears. In that varying the observation angle within a range of specular reflection light region group image is dynamically viewing, characterized in that the camouflage information appears when the original image is lost.

  In the latent image printed material of the present invention, camouflage information once appears at the moment when the base image reaches the end point of movement and disappears, and appears again at a position different from the point at which the base image disappears at the moment when the camouflage information disappears. . In other words, although the “jump” phenomenon itself in which the phase of the base image changes suddenly occurs, an image different from the base image once appears at the moment of “jump”, so that the consciousness that the image to be viewed changes will change. Concentrate and do not notice that the position of the base image has changed. This eliminates the feeling of strangeness caused by observing the “jump” phenomenon. Further, since the image change effect is provided in addition to the moving image effect, the image change is richer than the conventional technology having only the moving image effect, and both the authenticity discrimination and the forgery resistance are improved.

  In order to avoid the occurrence of the “jump” phenomenon, it is no longer necessary to control the printing so that the saddle-like image line group and the latent image line group overlap each other. As a result, the manufacturing difficulty level is greatly reduced, and the manufacturing becomes easier.

  The latent image print of the present invention does not require a dedicated production apparatus or machine like a hologram, and can be produced by using a general functional material and an existing printing machine, and has a particularly high printing accuracy. Production is easy, and cost performance is high.

(A) shows the front view of the latent image printed material in this invention, (B) shows a side view. The outline | summary of a structure of the latent image printed matter in this invention is shown. The 1st printing layer in this invention is shown. The structure of the 2nd printing layer in this invention is shown. The IP drawing line group in this invention is shown. The structure and production method of the IP image line in the present invention will be described. The camouflage drawing line group in this invention is shown. An example of the positional relationship of the superposition of the bowl-shaped element, the IP image line, and the camouflage image line in the present invention is shown. FIG. 9 shows the effect when the latent image printed material in the present invention in FIG. An example of the positional relationship of the superposition of the bowl-shaped element, the IP image line, and the camouflage image line in the present invention is shown. The effect at the time of changing and observing the inclination of the latent image printed matter in this invention of FIG. 10 is shown. (A) shows the front view of the latent image printed material in this invention, (B) shows a side view. The outline | summary of a structure of the latent image printed matter in this invention is shown. The 1st printing layer in this invention is shown. The specific structure of the 1st printing layer in this invention is shown. The structure of the 2nd printing layer in this invention is shown. An example of the positional relationship of the superposition of the bowl-shaped element, the IP image line, and the camouflage image line in the present invention is shown. The effect at the time of observing by changing the inclination of the latent image printed matter of the present invention in FIG. 17 is shown. An example of the positional relationship of the superposition of the bowl-shaped element, the IP image line, and the camouflage image line in the present invention is shown. The effect at the time of observing by changing the inclination of the latent image printed matter of the present invention in FIG. 19 is shown. (A) shows the front view of the latent image printed material in this invention, (B) shows a side view. The outline | summary of a structure of the latent image printed matter in this invention is shown. The 1st printing layer in this invention is shown. The structure of the 2nd printing layer in this invention is shown. An example of the positional relationship of the superposition of the bowl-shaped element, the IP image line, and the camouflage image line in the present invention is shown. FIG. 25 shows the effect when the latent image printed material in the present invention in FIG. Problems in the prior art will be described. Problems in the prior art will be described.

(First embodiment)
DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

  In the first embodiment, a configuration in the case where the bowl-shaped element (8) has a line shape will be described. FIG. 1 shows a latent image printed material (1) according to the present invention. FIG. 1A shows a front view of the latent image printed matter (1), and FIG. 1B shows a cross-sectional view of the latent image printed matter (1) along the line AA ′.

  The latent image print (1) is formed by forming a print image region (3) on a substrate (2). The substrate (2) may be paper, plastic, metal or the like as long as the print image region (3) can be formed, and the material is not limited. The print image area (3) may be any color, and may be transparent or translucent. Moreover, there is no restriction | limiting in particular also about the magnitude | size of a base material (2).

  An outline of the configuration of the print image area (3) of the present invention is shown in FIG. The print image area (3) is composed of a first print layer (4) and a second print layer (5). As the stacking order, the second printed layer (5) is overlapped on the first printed layer (4). The second print layer (5) has an IP image line group (6) and a camouflage image line group (7).

  First, the first printed layer (4) will be specifically described. Shown in FIG. 3 is a first printed layer (4), and a ridge-like element (8) having a specific line width (W1) having a bulge is first in a first direction (direction S1 in the figure). And a plurality of bowl-shaped element groups (15) formed by being arranged at a pitch (P1). In the first printed layer (4), an image other than the bowl-shaped element group (15) can be formed. In the first embodiment, the first printed layer (4) has a wrinkle. In this example, the first printed layer (4) and the saddle-shaped element group (15) are the same because only the element group (15) exists. Hereinafter, the hook-shaped element group (15) will be described as the first printed layer (4).

  In FIG. 3, a plurality of vertically striped lines are arranged in the bowl-shaped element (8), but this is a pattern for distinguishing from other lines, and is actually a simple one. It is a line of books (hereinafter, the same applies to other image lines). Under diffuse reflected light, the color of the hook-like element (8) is not limited, and any color may be used. There may be.

  Further, the bowl-shaped element (8) needs to have light-dark flip-flop properties and / or color flip-flop properties and a characteristic of emitting strong reflected light under regular reflection light. In the present invention, “light / dark flip-flop” refers to the property that the brightness of a substance changes when light enters the substance, and “color flip-flop” refers to a substance that changes when the light enters the substance. Refers to the property of changing the hue of. Examples of inks used in printing having light and dark flip-flop properties include metallic metallic inks such as gold and silver, and glossy colored inks. Substances that are generally felt glossy have light and dark flip-flop properties. For example, silver ink looks only dark gray under diffusely reflected light that does not strongly reflect light, but appears lighter gray or white under specularly reflected light that strongly reflects light. In this way, the brightness of the ink having “brightness / darkness flip-flop” changes under regular reflection light.

  On the other hand, as ink used in printing having color flip-flop properties, there are pearl ink, liquid crystal ink, OVI, CSI (Color Shifting Ink) and the like. Many inks have an object color, but the iris pearl ink is colorless and transparent. For example, a red iris pearl ink is colorless and transparent under diffuse reflection light, but emits a red interference color under regular reflection light. As described above, the ink having the “color flip-flop property” changes in hue under specular reflection light. The saddle-like element (8) needs to have the optical characteristics as described above.

  Each bowl-shaped element (8) needs a certain raised height, and preferably has a raised height of at least 3 μm. Even when it is formed at a height lower than 3 μm, the effect of the present invention can be reproduced by forming the pitch of the elements narrow, but the visibility of the latent image becomes extremely low, as described above. In many cases, the latent image appearing on the screen is reproduced with a blurred feeling, which is not preferable. In addition, there is no upper limit in terms of the upper limit of the height of swell, but it is set to 50 μm or less in consideration of stability, friction resistance, proper distribution, etc. when a large amount is loaded.

  The first print layer (4) in the present invention is required to be printed by a printing method capable of forming a swell in a printed image line because a swell height is essential for the constituent elements. That is, it may be formed by flexographic printing, gravure printing, intaglio printing, screen printing, an ink jet printer, or the like. In addition, as in the embodiment, instead of directly forming the rising of the image line by printing, forming an uneven structure on the substrate by embossing or see-through, forming a printed film thereon, A film may be attached to form the first printed layer (4).

  In addition, when it is desired to impart high color flip-flop properties to the saddle-like element (8), it is desirable that pigments having color flip-flop properties are aligned and oriented on the surface of the image line of the saddle-like element (8). . Such a state is generally called leafing. As a method for obtaining an excellent leafing effect, for example, there is a method of imparting water repellency and oil repellency to a pigment as in the technique described in JP-A-2001-106937. When this method is used, it is preferable because the color of the reflected light emitted from the bowl-shaped element (8) under the specularly reflected light can be made richer. When the functional pigment and the color pigment having the leafing effect as described above are blended in a single ink, the functional pigment and the color pigment having the leafing effect are in a bowl-like shape even though they are printed with a single ink. In order to form separate layer structures in the upper layer and lower layer of the element (8), to exhibit extremely high color flip-flop properties as if the colored ink layer and functional pigment layer were printed with separate inks, It is particularly effective.

  Next, the second image (5) will be specifically described. FIG. 4 shows a second print layer (5). The second print layer (5) includes an IP image line group (6) shown in FIG. 5 and a camouflage image line group ( 7), and arranged alternately by shifting the phase in the first direction (S1 direction) so that the image lines do not overlap each other. The rising height is not particularly necessary for all the lines constituting the second printed layer (5).

  First, the IP image line group (6) among the two image line groups constituting the second print layer (5) will be described. Note that the IP of the IP image line is an abbreviation for Integral Photography, and is an abbreviation for a classic stereoscopic image forming method. This name is used because the basic structure of the image line group constituting the latent image of the present technology is similar to the image line structure obtained from this classic stereoscopic image forming method. The IP image line group (6) shown in FIG. 5 has a specific image line width (W2), and each of the IP image lines (9) having different shapes has a specific pitch P1 in the first direction (S1 direction). It is arranged in multiple numbers. The IP image line group (6) and the saddle-shaped element group (15) interfere with each other to produce an effect of appearance of an image moving under specular reflection, which is a feature of the present invention. Note that the IP image line (9) and the camouflage image line (10) to be described later refer not only to a black-painted image but also to an entire area of a certain size including a blank where no image exists. . A specific configuration and manufacturing method of the IP image line group (6) will be described with reference to FIG.

  FIG. 6 shows an image intended by the producer to appear as a latent image having a moving image effect under specular reflection light, that is, a base image (11). The base image (11) may be a character, a numerical value, a symbol, a mark, a figure, or the like, and may represent any arbitrary information. The base image (11) in the first embodiment is an image of cherry blossom petals. In this example, a binary image with poor gradation expression is used as the base image (11). However, a gradation image such as a photograph or a face image may be used. This base image (11) is converted into an IP line by the following procedure.

  When the base image (11) is selected, the width (W3) is shorter than the width of the base image (11) in the first direction (S1 direction), and the base is in the second direction (S2 direction) orthogonal to the first direction. The frame (12) having a height (H) longer than the height of the image (11) is applied to the base image (11), and only the base image (11) included in the frame is extracted and specified. To the image line width (W2). A value obtained by dividing W2 by W3 is referred to as a compression ratio. The smaller the compression ratio, the greater the magnitude and speed of movement of the base image (11) appearing as a latent image, the perspective, and the like.

  When one IP image line (9i) is completed, the position of the frame with respect to the base image (11) is then shifted by a specific pitch (P1) in the first direction (S1 direction) and included in the frame again. Only the base image (11) is taken out and compressed to a specific line width (W2). The completed IP image line (9i + 1) is arranged at a position translated from the previous IP image line (9i) by a specific pitch (P1) in the first direction (S1 direction). By continuing this operation until the frame (12) moves in the first direction (S1 direction) to a position where the base image (11) is not included in the frame (12), the IP image line group (6) is completed. To do. Adjacent IP image lines (9) compress an image in which the position where the frame (12) is applied to the base image (11) is shifted by a specific pitch (P1) in the first direction (S1 direction). Therefore, each IP line (9) is slightly different.

  In addition, the production method and the configuration of the IP image line group (6), the effects produced by changing the compression ratio, and the like are as described in Japanese Patent Application Laid-Open No. 2011-126028. Various configurations described in the publication may be applied.

  Next, the camouflage drawing line group (7) will be described. The camouflage image line group (7) is an image line group in which camouflage information intended to appear as a latent image is divided and expressed by a specific image line. As shown in FIG. 7, a pattern in which the characters “JAPAN” and the Hinomaru are deformed is the camouflage information in the first embodiment, and this camouflage information is represented by an image line having a specific line width (W4) at a specific pitch. The camouflage drawing line group (7) is configured and expressed by continuously arranging in (P1).

  The camouflage information of the present invention may be characters, numerical values, symbols, marks, figures, etc., and may represent arbitrary information. In this example, a binary image with poor gradation expression is used as camouflage information. However, a gradation image such as a photograph or a face image may be used. For the detailed configuration and manufacturing method, the matters described in Japanese Patent No. 4682283 and Japanese Patent No. 4660775 may be applied. Further, another IP image line obtained by dividing and compressing another base image (11) in the camouflage information may be used as the camouflage image line (10).

  Note that the line width (W2) of the IP line (9) and the line width (W4) of the camouflage line (10) exist between the hook-shaped element (8) and the hook-shaped element (8). It is desirable that the width is larger than the non-image line width (P1-W1). This is because the IP drawing line (9) and the camouflage drawing line (10) completely enter the non-drawing line existing between the hook-like element (8) and the hook-like element (8), and the hook-like element (8 This is because those image lines cannot appear as a latent image under regular reflection light when they do not overlap with each other.

  The second printed layer (5) having the IP image line group (6) and the camouflage image line group (7) having the above-described configuration has a color different from the color emitted by the hook-shaped element (8) under specular reflection light. Need to be. This characteristic is necessary for visualizing the latent image with a constant contrast under regular reflection light. In addition, since the second printed layer is preferably invisible under diffuse reflected light, it is desirable that the second printed layer be transparent, translucent, or light in color. The term “translucent” as used in this specification refers to a state that is not completely transparent but has a degree of transparency that does not completely hide the base.

  In addition, the second printing layer (5) prevents light from entering the first printing layer (4) existing under the second printing layer (5) under specular reflection light, resulting in printing. In order to create a latent image by creating the intensity of reflected light in the image area (3), it is desirable that the image area (3) has low gloss (matte) or has excellent light blocking properties. Note that the second printed layer (5) does not necessarily have the light and dark flip-flop properties and the color flip-flop properties as in the case of the bowl-shaped element (8), but it does not matter if it has these properties.

  The second printed layer is not particularly required to have a raised structure and may have a flat structure, but may have a raised structure. That is, it may be formed by offset printing, letterpress printing, flexographic printing, gravure printing, intaglio printing, screen printing, or the like, or may be formed by an ink jet printer or a laser printer.

  The second print layer (5) is superimposed on the first print layer (4) having the above-described configuration to form the latent image (1) of the present invention. First, the first printing layer (4) and the second printing layer are changed in effect by changing the positional relationship of the overlapping of the first printing layer (4) and the second printing layer (5). The most desirable positional relationship of the superposition of (5), the effect in that case, and the principle of the effect will be described. FIG. 8 is a diagram in which the first printed layer (4) and the second printed layer (5) overlap with each other in the most desirable positional relationship. As shown in FIG. 8, the first printed layer (4) is most desirable to have a relationship in which the IP image line (9) and the camouflage image line (10) overlap one by one on the saddle-like element (8). This is the positional relationship of the overlay of the second print layer (5).

  FIG. 9 shows the effect when the two printed layers overlap in the positional relationship of FIG. Under diffuse reflected light, neither the base image (11) nor the camouflage information appears in the printed image area (3), and is completely invisible (not shown). On the other hand, in the case of observing in a state where the A side is raised and tilted as shown in FIG. 9A under regular reflection light, the second printed layer (5) existing on the A side above the bowl-shaped element (8). ) Information is reproduced. That is, the characters “JAPAN” that is camouflage information appear.

  Next, when the latent image printed matter (1) is observed in a horizontal state as shown in FIG. 9B under the specular reflection light, the second existing at the apex of the raised portion on the bowl-like element (8). Information of the print layer (5) is reproduced. That is, the information existing at the apex of the raised portion on the bowl-shaped element (8) is the information that the base image (11) exists on the A ′ side of the image information of the IP image line group (6). The base image (11) appears on the A ′ side.

  Subsequently, when the A ′ side of the latent image printed material (1) is observed to be up as shown in FIG. 9C under regular reflection light, the second existing on the A side of the bowl-shaped element (8). The information of the print layer (5) is reproduced. That is, since the A ′ side above the saddle-shaped element (8) is information that the base image (11) exists on the A side of the image information of the IP image line group (6), The base image (11) appears on the A side. Note that the movement of the base image (11) is continuous between the angles from FIG. 9B to FIG. 9C, and changing the inclination of the latent image print (1) corresponds to the change. Thus, the base image (11) moves smoothly in parallel with the first direction.

  The principle that produces the above effect will be described. First, there is no light directly incident on the first printed layer (4) and the second printed layer (5) under diffuse reflected light, and no strong regular reflected light is emitted. ) And camouflage information is not sampled, and each image is completely invisible or nearly invisible.

  Next, the principle that camouflage information and the base image (11) appear at a specific observation angle under specular reflection light, and that each image changes or appears to move by changing the observation angle will be described. . The saddle-like element (8) constituting the first printing layer (4) has at least one of color flip-flop property and light-dark flip-flop property, so that light is emitted to the print image region (3). When incident, the bowl-shaped element (8) reflects light strongly and regularly. In addition, since the bowl-shaped element (8) has a three-dimensional rise, when light is incident, the entire surface of the image line of the bowl-shaped element (8) does not reflect the light, but the incident light and the normal line. Only the surface of the image line forming a strong reflection of light. In addition, on the surface of each of the saddle-shaped elements (8), the camouflage image (10) and the IP image (9) obtained by compressing the base image (11) in the first direction (S1) are overlapped. Unlike the saddle-shaped element (8), each image line constituting the second printed layer (5) does not have the property of strongly reflecting light, and thus the saddle-shaped element (normal to the incident light) ( 8) While the surface of the very narrow image line reflects light, each image line of the second printed layer (5) overlaid on the surface suppresses the reflection of light, so that it reflects on the bowl-shaped element (8). Light intensity is generated. As a result, only the information of the second printed layer (5), which is normal to the incident light and superimposed on a very narrow range of saddle-like elements (8), is sampled and visualized by the intensity of the light. . In the saddle-like line group (4), the saddle-like elements (8) having bulges are continuously arranged at the pitch P1, and the surface of the line that is normal to the incident light exists every other pitch P1. As a result, the camouflage image line (10) or the IP image line (9) of the second printed layer (5) overlying the bowl-shaped element (8) is sampled at a period of the pitch P1, and the reflected light Visualized by strength.

  Since the camouflage drawing line group (7) is formed by arranging a plurality of camouflage drawing lines (10) at a pitch P1, the camouflage information is reproduced when the camouflage drawing line group (7) is sampled at a pitch P1 period. Is done. One IP image line group (6) is formed by arranging a plurality of IP image lines (9) with a period of pitch P1, and each IP image line (9) stores image information of the base image (11). Since the information is composed of information compressed and shifted by the pitch P1, the base image (11) is reproduced when the IP image line group (6) is sampled at the cycle of the pitch P1. As described above, when the first print layer (4) and the second print layer (5) interfere with each other, camouflage information is sampled from the camouflage image line group (7), and the IP image line group (6). Has a structure in which the base image (11) is sampled.

  As shown in FIGS. 9A to 9B and 9C, when the observation angle is changed under specular reflection light, the angle of light incident on the latent image printed material (1) changes. In this case, the image surface of the saddle-like element (8) that is normal to the incident light changes with a change in the angle of the incident light, and the phase of the second printed layer (6) to be sampled is shifted accordingly. If incident light is incident at an angle orthogonal to the surface of the saddle-like element (8) on which the camouflage image line group (7) overlaps, the camouflage information is reproduced and the IP image line group (6) is The base image (11) is reproduced when it is incident at an angle perpendicular to the surface of the line of the overlapping saddle-like elements (8). The IP image line (9) is composed of information obtained by compressing the entire base image (11) in the first direction. This information includes the base image (11) by the width of the frame in the first direction. Since it corresponds to the moved image information, when the sampling phase is shifted with respect to the latent image line (7), the phase of the reproduced base image (11) changes in the first direction. For this reason, when the observation angle is changed under specular reflection light, an effect appears in which the appeared base image (11) moves in parallel with the first direction.

  The above is the principle that camouflage information and the base image (11) appear at a specific observation angle under specular reflection light, and that each image changes or appears to move by changing the observation angle.

  As described above, in the case of the most desirable positional relationship of the superposition of the first print layer (4) and the second print layer (5), the “jump” phenomenon that has been a problem of the conventional technique is No camouflage information and the base image (11) are changed at a specific observation angle, and when the base image (11) appears, the camouflage information and the base image (11) are continuously changed to the specific angle (direction S1) as the observation angle changes. A moving effect occurs.

  Subsequently, an effect when the first printed layer (4) and the second printed layer (5) are deviated from the most desirable positional relationship will be described. FIG. 10 shows an example in which the first printing layer (4) and the second printing layer (5) are formed so as to deviate from the most desirable positions, and one saddle-like element (8) has one This is an example in which a camouflage drawing line (10) and two other IP drawing lines (9A, 9B) overlap.

  FIG. 11 is used to explain the effect produced in the latent image printed material (1) of the present invention when the first printed layer (4) and the second printed layer (5) are laminated in the overlapping positional relationship shown in FIG. I will explain. Under diffuse reflected light, neither the base image (11) nor the camouflage information appears in the printed image area (3), and is completely invisible (not shown). On the other hand, in the case of observing in a state where the A side is raised and tilted as shown in FIG. 9A under regular reflection light, the second printed layer (5 ) Information is reproduced. That is, the information on the 9 A IP line (9A) out of the two IP lines (9A, 9B) exists on the A side of the bowl-shaped element (8), and this information is the A side. Therefore, the base image (11) appears on the A side. When the latent image print (1) is tilted from the angle shown in FIG. 11 (a) to the horizontal angle shown in FIG. 11 (b), the base image (11) moves from the A side, but the A side Suddenly becomes invisible at certain locations (vanishing points).

  Next, when the latent image print (1) is observed in a horizontal state as shown in FIG. 11 (b) under specular reflection light, the second existing at the apex of the raised portion on the bowl-shaped element (8). Information of the print layer (5) is reproduced. That is, since it is the camouflage drawing line group (10) that exists at the apex of the rising portion on the bowl-shaped element (8), camouflage information appears.

  Subsequently, when the A ′ side of the latent image printed material (1) is tilted to the up position as shown in FIG. 11C under regular reflection light, it exists on the A ′ side of the bowl-shaped element (8). The information of the second print layer (5) to be reproduced is reproduced. That is, what exists on the A ′ side of the bowl-shaped element (8) is information on the IP line (9B) of 9B out of the two IP lines (9A, 9B), and this information is A ′. Since the base image (11) exists on the side, the camouflage information disappears and the base image (11) appears on the A ′ side. In this case, the phase at which the base image (11) appears and the vanishing point at which the base image (11) becomes invisible in FIG. 11 (a) are greatly different, but the observer is aware of it. Absent. Further, as shown in FIGS. 11A and 11B, when the base image (11) once appears, if the inclination of the latent image printed material (1) is changed, the change corresponds to the change. The phase of the base image (11) continuously moves in parallel with the first direction until the base image (11) disappears. The principle that produces these effects is the same as the principle described in the example of FIG.

  As described above, another IP image line that is different from the most desirable positional relationship of the superposition of the first printed layer (4) and the second printed layer (5) and is different for one saddle-shaped element (8). When (9A, 9B) overlap, the “jump” phenomenon itself occurs, but camouflage information once appears before the base image (11) disappears and appears again at a different position.

  That is, although the “jump” phenomenon itself in which the phase of the base image changes suddenly occurs, camouflage information different from the base image (11) appears once at the moment of “jump”, so that even if “jump” occurs, the image does not appear. Consciousness concentrates on the change (the base image has reappeared), and an effect of not noticing that the position of the base image (11) has changed is produced. As a result, the viewer no longer feels uncomfortable due to a sudden change in the position of the base image (11) due to the “jump” phenomenon.

  Due to this effect, in order to avoid the occurrence of the “jump” phenomenon as in the prior art, the printing is controlled so that the first printing layer (4) and the second printing layer (5) overlap each other. This eliminates the need for it, and the effect of greatly reducing the manufacturing difficulty can be obtained.

  In the first embodiment, the IP image line group (9) that appears under specular reflection light has been described as an example composed of one type of base image (11). However, the IP image line group (9) consists of a plurality of different base images (11). Also good. As a specific configuration of the IP image line group (6), various configurations described in JP2011-126028A can be used.

  In the first embodiment, the saddle-like element (8) of the first printed layer (4) is a simple image line, but is not limited to this. The first printed layer (4) may be arranged in a matrix. An example of forming a special checkered pattern instead of simply arranging in a matrix using the pixel-shaped ridge-like elements (8) will be described in the second embodiment. Further, in the first embodiment, the line width of all the saddle-like elements (8) is the same, but the line width is changed within a range not exceeding 20%, and the first printed layer (2) It is also possible to express significant information by creating shades.

  The image line in the present invention refers to a dotted line, a broken line, a straight line, a curved line, a broken line, or the like in which halftone dots, which are small dots forming a printed image, are continuously arranged in a specific direction at a certain distance. A pixel is formed by collecting at least one printing halftone dot or a plurality of printing halftone dots into a lump, various shapes such as a circle, a triangle, a polygon including a quadrangle, and a star, or a character, a symbol, a number, or the like.

  In addition, specular reflection in this specification refers to a phenomenon in which strong reflected light is generated at an angle substantially equal to the angle of incident light when light is incident on a substance at an incident angle, and diffuse reflection is This refers to a phenomenon in which weak reflected light is generated at an angle different from the angle of incident light when light is incident on a substance at an incident angle. For example, when an iris pearl ink is taken as an example, it appears colorless and transparent in the diffuse reflection state, but emits a specific interference color in the regular reflection state. Observing under specularly reflected light means observing from a viewpoint at a reflection angle that is substantially equal to the angle of light incident on the printed material, and observing under diffusely reflected light means a larger angle than the angle of light incident on the printed material. It refers to the state of observation at different angles.

(Second embodiment)
Subsequently, as a second embodiment, the saddle-like elements (8), which were line-shaped in the first embodiment, are formed by circular pixels, and they are arranged in a special checkered pattern. An example that can ensure the effect that the image information of the IP image line group (6) and the camouflage element group (7) included in the second printed layer (5) is surely reproduced under regular reflection light. Will be described.

  FIG. 12 shows a latent image printed matter (1 ′) in the second embodiment. FIG. 12A shows a front view of the latent image printed matter (1 ′), and FIG. 12B shows a cross-sectional view of the latent image printed matter (1 ′) along the line AA ′.

  The latent image printed matter (1 ′) is formed by forming a print image region (3 ′) on a base material (2 ′). The substrate (2 ′) may be paper, plastic, metal or the like as long as the print image region (3 ′) can be formed, and the material is not limited. The print image area (3 ′) may be any color, and may be transparent or translucent. Moreover, there is no restriction | limiting in particular also about the magnitude | size of a base material (2 ').

  FIG. 13 shows an outline of the configuration of the print image area (3 ′) of the present invention. The print image area (3 ′) includes a first print layer (4 ′) and a second print layer (5 ′). As a laminated structure, the second printed layer (5 ′) is superimposed on the first printed layer (4 ′). The second print layer (5 ′) has an IP image line group (6 ′) and a camouflage image line group (7 ′).

  The first printing layer (4 ′) will be specifically described. FIG. 14 shows a first printed layer (4 ′). The first printed layer (4 ′) has a raised pixel-like curved element (8 ′) in a predetermined direction in a predetermined direction. Plurally arranged at a pitch. The curved surface element (8 ′) in the second embodiment has a shape of a circle having a rise, but is not limited to this shape, and the shape of the curved surface element (8 ′) May have any shape as long as the cross-sectional shape is a three-dimensional curved surface, that is, a structure having a bulge, and the planar shape is symmetrical with respect to at least one specific direction. It has not only a hemispherical shape with a raised center but also a three-dimensional curved surface shape such as a semi-elliptical sphere, a symmetrical shape with a certain curvature such as a bowl shape, and a polygonal column such as a triangular prism, pentagonal prism, hexagonal prism, etc. However, the planar shape may be a shape having a curve such as a circle or an ellipse, a polygon such as a triangle, a pentagon, or a hexagon. Note that the three-dimensional structures of all the curved elements (8 ′) constituting the first printed layer (4 ′) need to be similar in shape.

  The first printed layer (4) is formed by “arraying in a checkered pattern” in which curved-surface elements (8 ′) have a shape conforming to the checkered pattern. The “arranged in a checkered pattern” referred to in this specification is a state in which the elements are arranged in a pattern similar to a general checkered pattern, but is different from a state in which the elements are arranged in a complete checkered pattern. Specifically, “arranged in a checkered pattern” means “curved elements (8 ′) having the same shape are alternately arranged at a predetermined pitch like a checkered pattern, and in a specific direction (in the embodiment, , The curved elements (slantly adjacent to each other in the first direction (S1)) at an intermediate position in a specific direction between the curved element (8 ') and the curved element (8'). 8 ′) is a configuration in which the center in a specific direction is located, and the curved elements (8 ′) are arranged in a configuration in which none of the sides or end portions are in contact with each other. In addition, in the arrangement of the curved surface elements (8 ') constituting the curved surface elements (8'), other conditions that must be satisfied will be described later. In the description of the specific configuration in the embodiment, the specific direction is the first direction (horizontal direction: S1 direction in the drawing), and the direction orthogonal to the specific direction is the second direction (vertical direction: drawing). Middle S2 direction). In the present embodiment, the first direction is the horizontal direction and the second direction is the vertical direction. However, the first direction and the second direction may be any direction as long as they intersect each other.

  The first printed layer (4 ′) has a length of the element length W1 in the first direction (S1 direction in the figure) and the length of the element in the second direction (direction S2 in the figure) W2. Circular curved elements (8 ') having a specific pitch (P1) in the first direction (S1) and a specific pitch (P2) in the second direction (S2) are arranged in a checkered pattern. It consists of Further, the curved surface element (8 ′) may have any color, and may be transparent or translucent. The pitch (P1) and the pitch (P2) may be the same value or different values. In consideration of image line reproducibility in printing, image resolution required for the latent image, etc., both the length and each pitch (P1, P2) of the curved surface element (8 ′) in the first direction are It is desirable to form in the range of 0.05 mm to 5 mm.

  In the arrangement of the curved surface elements (8 ′) constituting the first printing layer (4 ′), the conditions that must be satisfied in addition to the checkerboard arrangement will be specifically described. First, in addition to arranging the curved elements (8 ′) in a checkered pattern, the positional relationship described below must be satisfied with respect to at least one specific direction. The positional relationship that the element length (W1) of the curved element (8 ′) and the arrangement pitch (P1) in the first direction (S1) must be satisfied will be specifically described with reference to FIG. FIG. 15B is an enlarged view showing, as an example, three saddle-like elements (8A ′, 8B ′, 8C ′) that are adjacent to each other in an oblique direction, which is a basic repeating structure in a checkered pattern arrangement. The first printed layer (4 ′) in the second embodiment can be considered to be formed by repeatedly arranging the basic structure shown in FIG. 15B vertically and horizontally. .

  Of the three bowl-shaped elements (8A ′, 8B ′, 8C ′), the left-end bowl-shaped element (8A ′) and the right-end bowl-shaped element (8C ′) have a pitch (P1) × 2 (double). The phase is shifted in the first direction (S1) only, and there is no shift in the second direction (S2). The positional relationship between the leftmost bowl-shaped element (8A ′) and the rightmost bowl-shaped element (8C ′) is referred to as a “position adjacent to the first direction” in this specification. On the other hand, the center in the first direction (S1) of the saddle-shaped element (8B ′) located at the top is the center in the first direction (S1) of the left-most saddle-shaped element (8A ′) The linear element (8C ′) is located on an extension of a straight line extending in the second direction through a point equidistant from the center in the first direction (S1). That is, the center of the saddle-shaped element (8B ′) positioned at the top is shifted by the pitch (P1) in the first direction (S1) with the center of the leftmost saddle-shaped element (8A ′) as a reference. In the second direction (S2), the phase is shifted by the pitch (P2). The positional relationship between the bowl-shaped element (8B ′) and the bowl-shaped element (8A ′) and the positional relation between the bowl-shaped element (8B ′) and the bowl-shaped element (8C ′) Is called a positional relationship.

  In constructing the first printed layer (4 ′), at least one direction (in the first embodiment, the first embodiment) in the positional relationship of the three adjacent saddle-shaped elements (8A ′, 8B ′, 8C ′). The phase of each end on the first direction (S1) of the adjacent saddle-shaped elements (8A ′, 8B ′, 8C ′) is completely in contact with one direction (S1)) It is indispensable to have a positional relationship overlapping with the part. Specifically, the phase in the first direction (S1) of the right end (8AR ′) of the leftmost saddle-shaped element (8A ′) is the left end (8BL ′) of the topmost saddle-shaped element (8B ′). ) In the first direction (S1) at the right end (8BR ') of the upper saddle-shaped element (8B') is present at the same position as or on the right side, and the rightmost saddle-shaped element (8B ') 8C ′) must be present at the same position as the left end (8CL ′) or on the right side. When completely touching, the phases of 8AR ′ and 8BL ′, 8BR ′ and 8CL ′ with respect to the first direction (S1) coincide with each other, and as shown in FIG. In this case, 8BL ′ has a region overlapping with each of 8BL ′ and 8AR ′ by being positioned on the left side of 8AR ′ (the direction in which the bowl-shaped element (8A ′ having 8AR ′) is located), and 8CL ′ ′ Is located on the left side of 8BR ′ (the direction in which the bowl-shaped element (8B ′) having 8BR ′ is present), so that 8CL ′ has a region overlapping each part of 8BR ′. In order to satisfy this positional relationship, in the first direction (S1) between the diagonally adjacent saddle-like elements (8) (for example, saddle-like elements (8A ′) and saddle-like elements (8B ′)). The phase difference (pitch (P1)) needs to be less than or equal to the length (element length (W1)) in the first direction (S1) of the bowl-shaped element (8). This is an essential condition in the arrangement of the saddle-like elements (8) forming the first printed layer (4 ') other than arranging them in a checkered pattern. Furthermore, the overlapping region in the present invention includes not only a region that partially overlaps but also a case where they are in contact with each other, that is, a case where the phases of 8AR ′ and 8BL ′ in the first direction (S1) are completely the same. is there.

  In summary, the requirements for the arrangement of the hook-like elements (8) in the first printed layer (4 ′) are that the hook-like elements (8) are arranged in a checkered pattern, that is, “the same shape The saddle-like elements (8) are arranged alternately in the vertical and horizontal directions like a checkerboard pattern, and are diagonally above and diagonally below on the middle phase in a specific direction between the laterally adjacent saddle-like elements (8). It is a configuration in which the centers of the matching hook-shaped elements (8) are positioned, and any side or end of each hook-shaped element (8) is arranged in a configuration that does not touch each other. And “the phase difference (pitch (P1)) in a specific direction between the saddle-shaped elements (8) obliquely adjacent to each other is equal to or less than the length (element length (W1)) in the specific direction of the bowl-shaped elements (8). It is only necessary to satisfy the two conditions. The other required configurations and characteristics of the first printing layer (4 ′) in the second embodiment are the same as those of the first printing layer (4) in the first embodiment, so that the description will be omitted. Omitted.

  FIG. 16 shows the second print layer (5 ′). Similar to the first embodiment, it has an IP image line group (6 ′) composed of IP image lines (9 ′) and a camouflage image line group (7 ′) composed of camouflage image lines (10 ′). Other specific configurations, characteristics, manufacturing methods, and the like are the same as those of the first printed layer (4) in the first embodiment, and thus description thereof is omitted.

  The latent image print (1 ′) in the second embodiment is obtained by superimposing the second print layer (5 ′) on the first print layer (4 ′) having the above-described configuration. Can do. FIG. 17 shows an example in which the second print layer (5 ′) overlaps the first print layer (4 ′) in the most desirable positional relationship, and FIG. 18 shows the effect in that case. FIG. 17 shows an example in which one camouflage drawing line (10 ′) and one IP drawing line (9 ′) overlap one curved element (8 ′).

  Under diffuse reflected light, neither the base image (11 ′) nor the camouflage information appears in the print image area (3 ′) and is completely invisible (not shown). On the other hand, when the observation is performed with the A side raised and tilted as shown in FIG. 18A under regular reflection light, the camouflage information “JAPAN” existing on the A side above the curved element (8 ′). Appears.

  Next, when the latent image print (1 ′) is observed in a horizontal state under regular reflection light as shown in FIG. 18B, it exists at the apex of the raised portion on the curved element (8 ′). Information of the second print layer (5 ') is reproduced. That is, the information that the base image (11 ′) exists on the A ′ side of the image information of the IP image line group (6 ′) exists at the apex of the rising portion on the curved surface element (8 ′). Therefore, the base image (11) appears on the A ′ side.

  Subsequently, when observed with the A ′ side of the latent image printed material (1 ′) raised as shown in FIG. 18C under regular reflection light, it exists on the A side of the curved element (8 ′). The information of the second print layer (5 ′) to be reproduced is reproduced. That is, since the information present on the A ′ side on the curved surface element (8 ′) is information indicating that the base image (11 ′) exists on the A side of the image information of the IP image line group, The image (11 ′) appears on the A side. When the base image (11 ′) once appears as shown in the angles shown in FIGS. 18B to 18C, if the inclination of the latent image printed material (1 ′) is changed, A smooth moving image effect is produced in which the base image (11 ′) continuously moves in parallel with the first direction in response to the change.

  As described above, in the case of the most desirable positional relationship of the superposition of the first print layer (4 ′) and the second print layer (5 ′), “jump”, which has been a problem of the prior art. The phenomenon does not occur, and the camouflage information and the base image (11 ′) change at a specific observation angle, and when the base image (11 ′) appears, the specific angle (S1 direction) is accompanied by a change in the observation angle. The effect is to move continuously.

  Next, an effect when the position of the first printed layer (4 ′) and the second printed layer (5 ′) are shifted from the most desirable positional relationship will be described. FIG. 19 shows an example in which the first printed layer (4 ′) and the second printed layer (5 ′) are formed so as to deviate from the most desirable positions, and one curved element (8 ′) is formed. This is an example in which one camouflage drawing line (10 ′) and two other IP drawing lines (9A ′, 9B ′) are arranged.

  Under diffuse reflected light, neither the base image (11 ′) nor the camouflage information appears in the print image area (3 ′) and is completely invisible (not shown). On the other hand, the second printed layer existing on the A side above the curved element (8 ') when observed with the A side raised and inclined as shown in FIG. The information (5 ′) is reproduced. That is, what exists on the A side of the curved surface element (8 ′) is information on the IP image line (9A ′) of 9A ′ out of the two IP image lines (9A ′, 9B ′). Since the information is information in which the base image (11 ′) exists on the A side, the base image (11 ′) appears on the A side. When the latent image print (1) is moved from the angle shown in FIG. 20 (a) to the horizontal angle shown in FIG. 20 (b), the base image (11) is closer to the A side, It suddenly becomes invisible at a specific place (vanishing point).

  Next, when the latent image print (1 ′) is observed in a horizontal state as shown in FIG. 20 (b) under the regular reflection light, the first existing at the apex of the raised portion above the bowl-shaped element (8). Information of the second print layer (5 ') is reproduced. That is, since the camouflage drawing line group (10 ′) is present at the apex of the raised portion on the curved surface element (8 ′), the camouflage information appears.

  Subsequently, when the A ′ side of the latent image printed material (1 ′) is observed to be raised as shown in FIG. 20C under the regular reflection light, the curved element (8 ′) is moved to the A ′ side. The information of the existing second printing layer (5 ′) is reproduced. That is, what exists on the A ′ side of the curved surface element (8 ′) is information on the IP image line (9B ′) of 9B ′ among the two IP image lines (9A ′, 9B ′). Since the information is information in which the base image (11 ′) exists on the A ′ side, the camouflage information disappears and the base image (11 ′) appears on the A ′ side. In this case, the phase at which the base image (11 ′) appears and the vanishing point at which the base image (11 ′) becomes invisible in FIG. There is nothing. Also, as shown in FIGS. 20A and 20B, when the base image (11 ′) once appears, changing the inclination of the latent image print (1) corresponds to the change. As a result, a smooth moving image effect is produced in which the phase of the base image (11 ′) continuously changes in the first direction.

  As described above, the first printed layer (4 ′) and the second printed layer (5 ′) deviate from the most desirable positional relationship, and one curved element (8 ′) is different from the other. When the IP image lines (9A ′, 9B ′) overlap, the “jump” phenomenon itself occurs, but the camouflage information is temporarily displayed until the base image (11 ′) disappears and appears again at a different position. Appear.

  Although the “jump” phenomenon itself in which the phase of the base image (11 ′) changes at a stroke is generated as in the first embodiment, camouflage information different from the base image (11 ′) is temporarily displayed at the moment of “jump”. Therefore, even if a “jump” occurs, the consciousness concentrates on the change of the image (the base image reappears), and the effect of not realizing that the position of the base image (11 ′) has changed is produced. As described above, in the first embodiment and the second embodiment, although the configuration of the first print layer (4) is greatly different, the same effect can be obtained.

  As described above, the difference between the first printed layer (4) in the first embodiment and the first printed layer (4 ′) in the second embodiment is that the line-shaped saddle-shaped element ( The area where the base material (2) between 8) and the bowl-shaped element (8) is exposed, that is, there is no non-image area that penetrates the entire print image area (3 ′) in the second direction (S2 direction). It is.

  The advantages of forming the first print layer (4 ′) in which there is no non-image area that penetrates the entire print image area (3 ′) are as follows. In the configuration of the latent image printed matter (1 ′) of the present invention, each image line included in the second printed layer (5 ′) superimposed on the first printed layer (4 ′) It is possible to obtain an effect of being visualized as a latent image under specular reflection light only after being superimposed on the curved surface element (8 ′) of the printing layer (4 ′). In other words, the imprinting between the first printed layer (4 ′) and the second printed layer (5 ′) shifts, so that there is no non-contact between the curved element (8 ′) and the curved element (8 ′). Each image line of the second printed layer (5 ′) that overlaps the image area and does not overlap the curved surface element (8 ′) is not visualized under specular reflection light. Therefore, for example, the camouflage image line (10 ′) or IP of the second printing layer is smaller than the image line width of the non-image area so that the entire image line does not enter the non-image area even when the printing is misaligned. By designing the image line width of the image line (9 ′) to be large, it is necessary to ensure the effect that all the latent image images are visualized under specular reflection light.

  In addition, in the case of fixed information, such as the camouflage information of the first embodiment or the second embodiment, it is only necessary that the camouflage information appears at a specific angle under specular reflection light, If the camouflage image line (10 ′) of the second print layer is designed to be larger than the image line width of the non-image area, the effect of visualizing the camouflage information can be ensured. However, in the case of an image line including image information in which the base image (11 ′) exists in different phases in the entire image line width of each IP image line (9 ′), such as the IP image line group (6 ′), Since the information of the IP image line (9 ′) that does not overlap the curved surface element (8 ′) is not reproduced, the motion information is discarded, and the motion of the base image (11 ′) that appears as a result is discarded. The size will be smaller.

  In the first printing layer (4 ′) configured in a checkered pattern in the second embodiment, the printing that was present in the image-like first printing layer (4 ′) in the second embodiment Since there is no non-image area that penetrates the entire image area (3 ′) in the second direction, all the IP image lines (9 ′) can be obtained even when the printing of the second print layer (5 ′) is greatly misaligned. ) And the camouflage drawing line (10 ′) always overlap the curved surface element (8 ′). As a result, it is possible to obtain an effect that all the image information included in the first direction of all IP image lines (9 ′) and camouflage image lines (10 ′) is reproduced. The filling rate (ratio occupied by the hook-shaped elements on the base material) of the curved-shaped elements (8 ′) in the second direction of the first printed layer (4 ′) in the checkered pattern is the same as that of the first embodiment. Since it is often lower than the first printed layer (4), the image resolution and visibility of the latent image appearing under specular reflection light tend to be low, but all the image information in the first direction This is effective as a configuration specialized for reproduction.

  As described above, in the latent image printed matter (1 ′) of the second embodiment, even if the first printing layer (4 ′) and the second printing layer (5 ′) are largely misaligned. The effect that all the image information included in the second print layer is reproduced can be ensured.

  Hereinafter, examples of the latent image printed matter produced in detail will be described in accordance with the above-described mode for carrying out the invention, but the present invention is not limited to these examples.

  FIG. 21 shows the latent image print (1-1). FIG. 21A shows a front view of the latent image printed matter (1-1), and FIG. 21B shows a cross-sectional view of the latent image printed matter (1-1) along the line AA ′. is there. The latent image print (1-1) is formed by forming a print image region (3-1) on a base material (2-1). As the substrate (2-1), a general white coated paper (Espricoat FM manufactured by Nippon Paper Industries Co., Ltd.) was used.

  The outline of the configuration of the print image area (3-1) of the present invention is shown in FIG. The print image area (3-1) has a first print layer (4-1) and a second print layer (5-1). In the second print layer (5-1), an IP image line group (6-1) and a camouflage image line group (7-1) are present.

  FIG. 23 shows the first printed layer (4-1), and the first printed layer (4-1) has a width of 0.5 mm in the first direction (S1 direction) and the second direction. The pitch-shaped element (8-1), which is a circle with a diameter of 0.5 mm and a height of 0.5 mm, has a pitch in the first direction (S1 direction) between diagonally adjacent elements of 0.4 mm, It comprises a checkered ridge-shaped element group (15-1) arranged continuously in a plurality of pitches in the direction (S2 direction) at 0.4 mm. FIG. 24 shows the second printed layer (5-1), in which IP image lines having an image line width of 0.25 mm are continuously arranged in the first direction at a pitch of 0.4 mm. There is a camouflage image line group (7-1) in which an image line group (6-1) and an image line width of 0.08 mm camouflage image line (10-1) are continuously arranged in the S1 direction at a pitch of 0.4 mm. Each IP image line (9-1) and each camouflage image line (10-1) are in a positional relationship in which the phase is shifted by 0.2 mm in the first direction, and the respective image lines are not overlapped. It was.

  The frame (not shown) of the IP image line (9-1) in the present embodiment has a length in the first direction (S1 direction) of 4 mm and a height in the second direction (S2 direction) of 5 mm. The compression rate was 0.0625. Other specific configurations of the first print layer (4-1) and the second print layer (5-1) are the same as described in the second embodiment, and a description thereof is omitted.

  First, the first printing layer (4-1) was printed on the base material (2-1) by the UV-drying screen printing method. The UV screen ink shown in Table 1 was used as the ink. This ink is translucent under diffuse reflection light and emits a green interference color under regular reflection light. Finally, the second printing layer (5-1) was printed on the first printing layer (4-1) by the offset printing method of the UV drying method. The ink used was a transparent matte varnish (made by Matt Medium T & K TOKA). The raised height of the bowl-shaped element (8-1) was about 12 μm.

  As for the positional relationship of the overlapping of the two images, the respective images were superimposed so as to have the positional relationship shown in FIG.

  The effect of the latent image printed matter (1-1) of Example 1 formed with the above configuration will be described with reference to FIG. When the latent image printed matter (1-1) of the present invention is observed under diffuse reflection light, the base image (11-1) and the camouflage information appear in the print image region (3-1) under diffuse reflection light. It was completely invisible (not shown). On the other hand, when the observation is performed with the A side being raised and inclined as shown in FIG. 26A under regular reflection light, the gray base image (11-1) is A in the green print image area (3). Appeared on the side. Next, when the latent image print (1-1) is observed in a horizontal state as shown in FIG. 26 (b) under regular reflection light, gray camouflage information appears in the green print image area (3). did. Subsequently, when the A ′ side of the latent image printed material (1-1) is observed to be raised under the regular reflection light as shown in FIG. The base image (11-1) appeared on the A ′ side. The base image (11-1) disappears once at the angle of FIG. 26 (b), and camouflage information appears, but at the other observation angles, the first direction continuously corresponds to the change in inclination. It was confirmed that it changed in parallel.

  As mentioned above, it deviates from the most desirable positional relationship of the superposition of the first printed layer (4-1) and the second printed layer (5-1), and one saddle-shaped element (8-1) When different IP image lines (9A-1, 9B-1) overlap, the “jump” phenomenon itself occurs, but until the base image (11-1) disappears and appears again at a different position. In addition, once camouflage information appears and the “jump” occurs, it is confirmed that the consciousness concentrates on the change of the image, and the effect of not knowing that the position of the base image (11-1) has changed is produced. It was.

1, 1 ', 1-1 Latent image printed matter 2, 2', 2-1 substrate 3, 3 ', 3-1 print image area 4, 4', 4-1 first print layer 5, 5 ', 5-1 Second Print Layer 6, 6 ', 6-1 IP Image Line Group 7, 7', 7-1 Camouflage Image Line Group 8, 8 ', 8-1 Wavy Element 9, 9i, 9i + 1 , 9 ', 9A', 9B ', 9-1, 9A-1, 9B-1 IP image line 10, 10', 10A-1 Camouflage image line 11, 11 ', 11-1 Base image 12 Frame 13, 13 ', 13-1 Light source 14, 14', 14-1 Viewer's viewpoint 15, 15-1 Spider-like element group

Claims (2)

A printed image area on at least a part of the substrate;
The print image area is formed by laminating a second print layer on the first print layer,
The first printed layer includes a plurality of ridge-like elements having a bulge having at least one of a light-dark flip-flop property and a color flip-flop property under specular reflection light at a first pitch in a first direction. Having a group of hook-shaped elements arranged,
The second print layer has an IP line group and a camouflage line group having a color different from the color under regular reflection light of the bowl-shaped element,
The IP image line group is formed by arranging a plurality of IP image lines having different shapes obtained by dividing and compressing a base image in the first direction at the first pitch,
The camouflage image line group is formed by arranging a plurality of camouflage image lines obtained by dividing camouflage information of an image different from the base image at the first pitch in the first direction,
The IP stroke group and the camouflage stroke group are arranged without alternately overlapping in the first direction,
When observed at a specific observation angle under specular reflection light, the base image appears, and when the observation angle is changed within the range of the specular reflection light region, the base image is dynamically visually recognized. The latent image printed matter, wherein the camouflage information appears when the base image disappears. A printed image area on at least a part of the substrate;
The print image area is formed by laminating a second print layer on the first print layer,
The first printed layer has a pixel-like curved element having a bulge having at least one of a light / dark flip-flop property and a color flip-flop property under specular reflection light. A plurality of checkers are arranged in a second direction that intersects the direction,
The saddle-shaped elements adjacent in the oblique direction to the saddle-shaped elements adjacent in the first direction are the center in the first direction between the saddle-shaped elements adjacent in the first direction. And the phase of the center in the first direction of the saddle-shaped element adjacent in the oblique direction, and further adjacent to the saddle-shaped element adjacent in the first direction in the oblique direction. The matching saddle-shaped elements are arranged with overlapping regions in the first direction;
The diagonally adjacent hook-shaped elements are arranged with a first pitch shifted in the first direction, and the first pitch is equal to or less than the length of the hook-shaped element in the first direction. There,
The second print layer has an IP line group and a camouflage line group having a color different from the color under regular reflection light of the bowl-shaped element,
The IP image line group is formed by arranging a plurality of IP image lines having different shapes obtained by dividing and compressing a base image in the first direction at the first pitch,
The camouflage image line group is formed by arranging a plurality of camouflage image lines obtained by dividing camouflage information of an image different from the base image at the first pitch in the first direction,
The IP stroke group and the camouflage stroke group are arranged without alternately overlapping in the first direction,
When observed at a specific observation angle under specular reflection light, the base image appears, and when the observation angle is changed within the range of the specular reflection light region, the base image is dynamically visually recognized. The latent image printed matter, wherein the camouflage information appears when the base image disappears.

Images