JP6516262B2 - Latent image printed matter - Google Patents

Description

  The present invention relates to a latent image under specular light in the field of valuable printed matter such as banknotes, passports, securities, identification documents, cards, passing tickets, etc., which are security printed matter requiring a forgery-preventing effect. The present invention relates to a latent image printed matter characterized by having an animation effect that appears and appears to shake.

  Security printed matter represented by banknotes, passports, securities, identification cards, etc. requires anti-counterfeit technology in order to prevent copying and forgery. In addition, among the forgery prevention techniques, there is a particular need for a forgery prevention technique that can be used to determine authenticity, without requiring tools such as watermarks and holograms, and for all persons who have obtained printed matter.

  Among them, anti-counterfeit technology with so-called "moving visual effects" in which images appear to move is particularly noted. Moving-image visual effects (hereinafter referred to as "moving-image effects") in which images appear to move are easily used as eye-catching eyes and are difficult to forge, and thus they are often used as authenticity discriminators of security printed matter in recent years. There is a tendency. Technologies using holograms, parallax barriers, lenticules, etc. exist as well-known technologies capable of realizing the moving image effect, and these technologies have the feature that the image can be changed with a slight angle change, and the image is three-dimensional. Security printed matter having an effect that can be visually recognized and a moving image effect already exists widely.

  However, when a moving image effect is realized using a general parallax barrier or lenticular, a clear layer or a lens is required, so the substrate is almost limited to plastic, and the printed matter has a certain thickness (at least (About 150 μm), which exceeds the thickness allowed for generally available printed matter. For this reason, it can not be used for printed matter having a limited thickness, and tends not to be adopted except for plastic cards which allow a certain thickness. In addition, it is possible to finish the hologram extremely thin, and although it is used for various security printed matter represented by banknotes, there are major problems in the complexity of the manufacturing process and the high manufacturing cost as compared with general printed matter. .

  In order to solve the above problems, when light is incident on a scaly shaped line having high gloss and climax, the present inventors select the incident light and the normal of the scaly shaped line having climax. We have already applied for a printing technology capable of forming a three-dimensional effect and a moving image effect that utilizes the phenomenon in which light is strongly reflected only by the formed surface. The technology described in Patent Document 1 is an image obtained by processing an image obtained by a method for capturing a three-dimensional image called integral photography, and a technology capable of realizing a moving image effect as excellent as the technology described in Patent Document 1. It is. These technologies can be formed with a thickness of about 1/10 of the thickness of parallax barriers and lenticulars, and the manufacturing technology can be easily implemented using conventional plate making technology and printing technology. It has an excellent feature of being able to form a print image with a moving image effect at the same cost as a general print.

JP, 2011-126028, A

  The technique of Patent Document 1 has a characteristic of strongly specularly reflecting incident light, and divides a base image onto a group of ridge-like lines formed of ridge-like lines or pixels having a bulge. This is a technology that superimposes latent image lines formed by compressing an in-frame image with a predetermined reduction ratio, and interference between a wrinkled line group and a latent image line group under regular reflection light The basic image appears as a latent image in the above, and by changing the inclination of the printed matter, it is a technology that has the effect of making the basic image appear to move. This technology is particularly excellent for moving picture effects, and is characterized in that the base image that appears appears to move continuously and smoothly, but the direction of movement of the base image is the line direction of the group of eyelid-like lines. Since the direction of movement is limited in the orthogonal direction, that is, the arrangement direction of the drawing lines, only the movement in which the emerging base image translates in the same direction can be generated. That is, there is a problem that the movement is uniform and the variation of the visual effect is poor.

  The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to propose a latent image printed matter capable of producing a unique moving image effect that a base image appearing under specular light shakes. I assume.

  The latent image print of the present invention comprises a printed image area on at least a part of the substrate, and the printed image area is a scaly line having at least one of bright-dark flip-flop property and color flip-flop property. A latent image line group having a color different from the color of the wrinkled line under regular reflection light is stacked on the wrinkled line group arranged in a line at a first pitch in a first direction. In the latent image line group, a plurality of IP elements obtained by compressing an image obtained by dividing the base image at a predetermined reduction ratio are arranged in a line shape with at least one different from the direction or the pitch of the ridged line. A plurality of IP inversion elements, and a plurality of IP inversion elements formed by mirror-inversion of a plurality of IP elements have IP inversion elements arranged in a line in the order divided by the same direction and pitch as the IP elements; Elements and IP inversion elements overlap alternately It is arranged without, when observed under specular light, and based on the image appearance, depending on the viewing angle, and wherein a group image is visible swings.

  Furthermore, in the IP element group of the latent image printed matter according to the present invention, when the observation angle is continuously changed by arranging a plurality of IP elements in a direction and a pitch different from that of the ridge line, the base image It is characterized in that it is visually recognized as rocking motion with a twist.

  In the latent image printed matter of the present invention, unlike the moving image effect in which the conventional base image is translated only in a specific direction, the shape of the base image is changed, and a unique visual effect occurs. . This visual effect is eye-catching, excellent in discriminability, and excellent in counterfeit resistance since it is difficult to reproduce the same effect.

  In the present technology, as long as the latent image line groups overlap at a predetermined angle on the wrinkled line groups, the visually same visual effect always occurs, so that the wrinkled line and the latent image line are completely completed. It is no longer necessary to control imprinting so that they overlap to coincide. This greatly reduces the manufacturing difficulty and makes it easier to manufacture.

  The latent image printed matter of the present invention does not require a dedicated production apparatus or machine like a hologram, can be produced using a general functional material and an existing printing machine, and has high cost performance.

(A) shows the front view of an example of the latent image printed matter in this invention, (b) shows sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS The outline | summary of a structure of the latent image printed matter in this invention is shown. 1 shows a group of scaly streaks in the present invention. The latent image line group in this invention is shown. 1 shows IP elements in the present invention. 1 shows IP inversion elements in the present invention. The difference in the angle of the drawing direction of the eyelid-like drawing line group and the latent image drawing line group in this invention is shown. The production method of the IP element group in the present invention is shown. The production method of the IP reversal element group in this invention is shown. An example of the positional relationship which arrange | positions IP element group and IP inversion element group in this invention alternately is shown. An example of the positional relationship of the superposition of the cage-like drawing line group and the latent image drawing line group in this invention is shown. The effect at the time of changing the inclination and observing it is shown in the latent image printed matter of FIG. It is explanatory drawing of the fluctuating animation effect in this invention. An example of the effect of the latent image printed matter in this invention is shown.

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

  In the present embodiment, an example of a latent image printed matter (1) in which arrangement angles of the wrinkled drawing line group (4) and the latent image drawing line group (5) are different will be described. FIG. 1 shows a latent image print (1) in the present invention. FIG. 1 (a) is a front view of the latent image print (1), and FIG. 1 (b) is a cross-sectional view of the latent image print (1) in FIG. 1 (a) along line AA '. It is.

  The latent image print (1) has a print image area (3) formed on at least a part of the substrate (2). The substrate (2) may be paper, plastic, metal or the like as long as the print image area (3) can be formed, and the material is not limited. The formation site of the print image area (3) may be a part or the whole on the substrate (2). Also, the print image area (3) may be of 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 ridge-shaped line group (4) and a latent image line group (5). As the stacking order, the latent image line group (5) is stacked on the ridged line group (4). Further, the latent image drawing group (5) has an IP element group (5A) and an IP inverting element group (5B). In addition, "IP" of IP element is an abbreviation of Integral Photography, and is an abbreviation of the formation method of a classical three-dimensional image. This name is used because the basic structure of the elements constituting the moving image of the present technology is similar to the line structure obtained from this classical method of forming a stereoscopic image.

  First, the eyelid group (4) will be specifically described. FIG. 3 shows a group of eyelid-shaped lines (4), which has ridges and which has a line direction of a second direction (direction S2 in the drawing), and which has a specific line width (W1). The drawing line (6) is formed by being arranged in a line at a first pitch (P1) in a first direction (direction S1 in the drawing).

  In the present invention, “arranged in a line” means a state in which a plurality of elements are regularly arranged at a predetermined pitch. Further, “image line” in the present invention means a dotted line or broken line dividing line, a straight line, a curve, or the like, which is a small dot of a minimum unit forming a print image and arranged continuously for a fixed distance in a specific direction. Point a broken line etc.

  Although a plurality of vertical stripe lines are shown in FIG. 3 as being arranged in the form of a ridged line (6), this is a pattern for distinguishing it from the other lines, and it is actually a simple one. It is a line of a book (following, the same applies to other drawing lines). Under diffuse reflected light, the color of the wrinkled drawing line (6) may be any color, and it may be transparent or translucent.

  In addition, the ridge-shaped drawing line (6) needs to have bright and dark flip flop properties and / or color flip flop properties, and has a property of emitting strong reflected light under regular reflected light. In the present invention, "bright-and-dark flip-flop property" refers to the property that the lightness of the substance changes when light is incident on the substance, and "color flip-flop property" refers to the substance when light is incident on the substance. Refers to the nature of changing the hue of. Examples of the ink having light and dark flip-flop properties and used for printing include metallic metal inks such as gold and silver and gloss type colored inks. Substances that are generally perceived as shiny have bright and dark flip-flop properties. For example, silver ink appears only dark gray under diffuse light that does not reflect light strongly, but appears lighter gray or white under specular light that reflects light strongly. Thus, the ink having "bright and dark flip-flop" changes in lightness under regular reflection light.

  Pearl ink, liquid crystal ink, OVI, CSI (Color Shifting Ink), etc. exist as an ink used by printing provided with one color flip-flop property. Many inks have object colors, but iris colored pearl inks are colorless and transparent. For example, a red iris colored pearlescent ink is colorless and transparent under diffuse light, but emits a red interference color under specular light. Thus, the ink having "color flip flop" changes its hue under specular light. The scaly streaks (6) need to have the optical properties as described above.

  Each ridge-like drawing line (6) needs a certain rise height, and preferably has a rise height of at least 3 μm or more. Even in the case where the height is less than 3 μm, although it is possible to reproduce the effect of the present invention by forming the pitch of the drawing lines narrow, the visibility of the latent image becomes extremely low or the above As such, the base image that appears is often reproduced in an unclear and blurry manner, which is not preferable. There is no upper limit on the upper limit of the height of the swell, but the upper limit is not more than 1 mm in consideration of stability, friction resistance, distribution suitability, etc. when loaded in large quantities.

  According to the present invention, since a certain height of swelling is essential to the wrinkled drawing lines (6) constituting the wrinkled drawing lines group (4), printing is performed by a printing method capable of forming a swell on the printed drawing lines. Is preferred. That is, it may be formed by flexographic printing, gravure printing, intaglio printing, screen printing or the like. Also, as in the embodiment, instead of directly forming the bulge of the printing line by printing, a concavo-convex structure is formed on the base material (2) by embossing or plunging, and a printing film is formed thereon. Alternatively, a film may be attached to form a ridged streak group (4).

  Further, when it is desired to impart high color flip-flop properties to the eyelid-like drawing lines (6), it is preferable that pigments having color flip-flop properties are uniformly aligned on the surface of the eyelid-like drawing lines (6). . Such a state is generally called leafing, and as a method of obtaining excellent leafing effect, for example, a method of imparting water and oil repellency to a pigment as in the technology described in JP-A-2001-106937 is used. is there. Use of this method is preferable because the color of reflected light emitted from the scaly streak (6) under regular reflection light can be further enhanced. When a functional pigment having a leafing effect as described above and a coloring pigment are mixed in a single ink, the functional pigment having a leafing effect and the coloring pigment are in the form of a ridge despite printing with a single ink. In order to form a separate layer structure in the upper layer and the lower layer of the image line (6), in order to exert extremely high color flip-flop properties equivalent to the case where the colored ink layer and the functional pigment layer are printed with different inks. It is particularly effective. The above is the description of the eyelet-shaped ray group (4) of the present invention.

  Next, the latent image line group (5) will be specifically described. FIG. 4 shows a latent image line group (5), and the latent image line group (5) is, as described above, the IP element group (5A) shown in FIG. 5 and the IP inversion shown in FIG. And an element group (5B). As shown in the enlarged view of FIG. 4, the IP element group (5A) consists of a set of IP elements (7A), and the IP inversion element group (5B) consists of a set of IP inversion elements (7B). In the latent image line group (5), the IP element (7A) and the IP reversal element (7B) are arranged in a first direction (direction S1) in which the ridged line (6) is disposed so as not to overlap each other. Are alternately arranged out of phase in a third direction (S3 direction) which is a different direction. When IP elements (7A) and IP inverting elements (7B) adjacent to each other in one second pitch (P2) are folded at the center (C) of the second pitch (P2) shown by a dotted line in FIG. The shapes are almost similar shapes that substantially match the shape.

  In the present embodiment, the fourth direction (S4 direction) which is the drawing direction of the latent image line group (5) and the third direction (S3 direction) which is the arrangement direction And the first direction (S1 direction), which is the arrangement direction. In the present invention, the first pitch (P1) and the second pitch (P2), which are the arrangement pitches of the ridge-shaped line group (4) and the latent image line group (5), or the line It is necessary that at least one of the first direction (S1 direction) and the second direction (S2 direction), which are the arrangement directions, be different.

  Here, the image of the latent image drawing line group (5) in the second direction (S2 direction) which is the drawing direction of the eyelid-shaped drawing line group (4) and the first direction (S1 direction) which is the arrangement direction. The difference between the fourth direction (S4 direction) which is the line direction and the third direction (S3 direction) which is the arrangement direction is shown in FIG. In FIG. 7, the second direction (S2 direction) and the fourth direction (S4 direction) which are the drawing direction of each drawing line, and the first direction (S1 direction) and the third direction which are arrangement directions The angular relationship in the (S3 direction) is orthogonal to 90 degrees. Therefore, if the drawing direction is different by the angle α, the arrangement direction is also different by the angle α. In an example in which the arrangement directions (S1 direction and S3 direction) of the ridge-shaped line group (4) and the latent image line group (5) are different as in the present embodiment, the area of the print image area (3) Although it depends on the size of the base image (8) to appear, for example, in the case of a print image area (3) having a size of about 30 mm × 30 mm, the ridge-like line group (4) and the latent image line group The angular difference α between the first direction (S1 direction) and the third direction (S3 direction), which is the arrangement direction of 5), needs to be plus or minus 0.3 degrees or more and plus or minus 10 degrees or less. If it is less than 0.3 degrees, the swinging motion which is a feature of the present invention hardly occurs, and it can be recognized only as a visual effect translating in the arrangement direction as in the prior art. The reason is that it becomes too strong to recognize the shape of the base image (8). The base image (8) described above is an image for appearing as a latent image having a moving image effect under regular reflection light.

  It is preferable that the size of the second pitch (P2) of the latent image drawing line group (5) to the first pitch (P1) of the eyelid drawing line group (4) be in the range of 80% to 120%. . If the second pitch (P2) is smaller than 80% and larger than 120% of the first pitch (P1), the shape of the base image (8) can not be recognized.

  The most effective is in the range of about plus or minus 1 to 3 degrees with the angle difference α, and the second pitch (P2) is about 95% to 105% with respect to the first pitch (P1) Is the case of. The difference between the angle difference α and the pitch may be used simultaneously or may be used alone. In the case of using the pitch difference alone, it is natural that the second pitch (P2) should not be 100% of the first pitch (P1).

  An IP element group (5A) which is one of two element groups constituting the latent image drawing line group (5) is shown in FIG. The IP element group (5A) shown in FIG. 5 has a drawing direction in the fourth direction (S4 direction), and a plurality of IP elements (7A) having different shapes of a specific drawing line width (W2) are It is disposed in a line in the third direction (S3 direction) at a second pitch (P2) which is a specific pitch.

  An IP inversion element group (5B) which is another element group of two element groups constituting the latent image drawing line group (5) is shown in FIG. The IP inversion element group (5B) shown in FIG. 6 has a drawing direction in the fourth direction (S4 direction), and a plurality of IP inversion elements (7B) having different shapes of a specific drawing line width (W3). Are arranged in a line in the third direction (S3 direction) at the second pitch (P2).

  In the IP element group (5A) and the IP inversion element group (5B), the second pitch (P2), the third direction (S3 direction) and the fourth direction (S4 direction) of each need to be the same. is there. Further, the line widths (W2, W3) of the respective IP elements (7A) and IP inversion elements (7B) are preferably the same, but may be different. However, it is preferable to set the same value or a similar value as long as it is not desired to cause a significant deviation in the swinging manner of the appearing base image (8). If the line widths (W2, W3) of the elements are significantly different, it is difficult to make the IP elements (7A) and IP inversion elements (7B) adjacent to each other in one pitch approximately similar in shape As a result, a large deviation occurs in the way of the movement of the base image (8) that appears as a result.

  Also, although the IP element (7A) and the IP inversion element (7B) shown in the enlarged views of FIGS. 4, 5 and 6 are shown in different colors, this is for the sake of clarity of explanation and are the same color. You may use a different color for each element. Note that the IP element (7A) and the IP inversion element (7B) described later indicate not only the filled image but also the entire area of a certain size including the blank space where the image does not exist.

  First, the specific configuration and manufacturing method of the IP element group (5A) will be described with reference to FIG. What is shown in FIG. 8 is an image intended by the producer to appear as a latent image having a moving image effect under regular reflection light, and is composed of a base image (8). This base image (8) 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 (8) in the first embodiment is an image of cherry petals. Further, in the present embodiment, a binary image with poor gradation expression is used as the basic image (8), but a gradation image such as a photograph or a face image may be used. The basic image (8), which is an image of the petals of cherry blossoms, is made into an IP element (7A) in the following procedure.

  First, when the base image (8) is selected, a width (W4) shorter than the width in the third direction (S3 direction) of the base image (8) and a fourth direction orthogonal to the third direction (S3 direction) A frame (9A) having a size of height (H) longer than the height of the base image (8) in the (S4 direction) is applied to the base image (8), and the base image included in the frame (9A) (8) Only the image is taken out, and the taken out image is compressed to a specific image line width (W2) in the third direction (S3 direction). One IP element (7Ai) is completed by this series of procedures. The value obtained by dividing the specific image width after compression (W2) by the width before compression (W4) is called the compression ratio of the IP element (7Ai). The smaller the compression ratio, the larger the magnitude and speed of movement of the basic image (8) appearing as a moving image, the greater the sense of perspective, etc., while the appearing image becomes blurry and unclear.

  When one IP image line (7Ai) is completed, the position of the frame (9A) relative to the base image (8) is shifted by the second pitch (P2) in the third direction (S3 direction), Only the base image (8) included in (9A) is taken out and compressed to a specific line width (W2). The completed IP element (7Ai + 1) is disposed at a position translated from the previous IP element (7Ai) in the third direction (S3 direction) by a specific second pitch (P2). By repeating this work until reaching a position where the base image (8) is not included in the frame (9A), the IP element group (5A) is completed. As described above, since each IP element (7A) is configured while changing the position where the frame (9A) is applied to the base image (8), an image including even between adjacent IP elements (7A) Are slightly different.

  This IP element group (5A) is created by cutting out and compressing the phase (9A) of the frame (9A) by the second pitch (P2) in the third direction (S3 direction) with respect to the base image (8) In the order in which each IP element (7A) is cut out and compressed at a second pitch (P2), for example, in FIG. 8, 7Ai, 7Ai + 1, 7Ai + 2,. Therefore, when the image is sampled in the drawing direction (S3 direction) of the IP element (7A) with the second pitch (P2) and the width sufficiently narrower than the second pitch (P2), the base image (8 ) Is reproduced as it is. In the latent image printed matter (1) of the present invention, the basic image (8) which appears by changing the sampling position partially instead of sampling at a constant pitch or angle of the IP element group (5A) is shaken. To get the effect that Hereinafter, in the present invention, the IP element (7A) and the IP inversion element (7B) are cut out and compressed while shifting the phase of the frame (9A) by a fixed pitch in a specific direction with respect to the base image (8) The configuration arranged in order is referred to as "arranged in the order of division".

  Subsequently, a specific configuration of the IP inversion element group (5B) forming a pair with the IP element group (5A) and an example of a manufacturing method will be described with reference to FIG. Similar to the method of producing the IP element group (5A), a width (W5) shorter than the width in the third direction (S3 direction) of the base image (8), and a second orthogonal to the first direction (S1 direction) A frame (9B) having a size of height (H) longer than the height of the base image (8) in four directions (S4 direction) is fitted to the base image (8) and included in the frame (9B) Only the basic image (8) is taken out and compressed to a specific image line width (W3) in the third direction (S3 direction). The procedure up to here is the same as the fabrication procedure of the IP element (7A), but in the fabrication of the IP inversion element (7B), the element in this state is further orthogonal to the third direction (S3 direction) The mirror is inverted about the direction (S4 direction). Whether it becomes an IP inversion element (7B) or an IP element (7A) is determined depending on the presence or absence of this mirror inversion. One IP inversion element (7Bi) is completed by this series of procedures. The value obtained by dividing W3 by W5 is called the compression ratio of the IP inversion element (7Bi). The smaller the compression ratio, the larger the magnitude and speed of movement of the base image (8) that appears as a moving image, the greater the sense of perspective, etc., while the appearing image has a blurred and unclear outline. Same as 7A).

  When one IP inversion element (7Bi) is completed, subsequently, the position of the frame (9B) relative to the base image (8) is the second pitch (P2) having a specific pitch in the third direction (S3 direction) Shifting again, only the base image (8) contained in the frame (9B) is taken out and compressed to a specific line width (W3). The newly created IP inverting element (7Bi + 1) is disposed at a position translated from the previous IP inverting element (7Bi) in the third direction (S3 direction) by the second pitch (P2) having a specific pitch. Do. By continuing this work until reaching a position where the base image (8) is not included in the frame (9B), the IP reversal element group (5B) is completed. Similar to the IP elements (7A), the images contained in each adjacent IP inversion element (7B) are slightly different.

  This IP inversion element group (5B) is cut out and compressed while shifting the phase of the frame (9B) by the second pitch (P2) in the third direction (S3 direction) with respect to the base image (8) For example, in FIG. 9, an image in which each of the created IP inversion elements (7B) is continuously arranged as 7Bi, 7Bi + 1, 7Bi + 2,... Therefore, when the image is sampled in the drawing direction (S3 direction) of the IP inverting element (7B) with a second pitch (P2) and a width sufficiently narrower than the second pitch (P2), There is a feature that the image (8) is reproduced as it is. In the latent image printed matter (1) of the present invention, the sampling position is partially changed, instead of sampling at a constant pitch or angle of the IP inverting element group (5B) and the IP element group (5A) described above. It is possible to obtain an effect that a shaking motion occurs in the base image (8) that appears.

  The IP element group (5A) and the IP inversion element group (5B) are manufactured by the above procedure. As shown in FIG. 10A, if the IP element group (5A) and the IP inversion element group (5B) are arranged in the division order of the IP elements (7A) or IP inversion elements (7B), respectively, The same image as a mirror-inverted image, for example, an IP element (7Ai) and an IP inverting element (7Bi) obtained by mirror-inverting an IP element (7Ai) are arranged in a pair on one ridged drawing line (6) Not limited to the above configuration, as shown in FIG. 10 (b), an image substantially equal to the mirror-inverted image, for example, an IP element (7Ai) and an image substantially mirror-inverted to the IP element (7Ai) The IP inversion elements (7Bi + 1) may be arranged in pairs.

  The IP elements (7A) and IP inverting elements (7B) facing each other as a pair are the same as, or the same as, an image obtained by mirror inverting each other's image with respect to the direction orthogonal to the first direction (S1). The IP element group (5A) and the IP inversion element group (5B) are alternately arranged so that near, substantially equal images are paired, and the latent image line group (5) shown in FIG. 4 is completed.

  In addition, the method of producing the IP element group (5A) and the IP inversion element group (5B) and the configuration thereof, and the effects produced by changing the compression rate are as described in JP 2011-126028 A. You may apply the various structure of Unexamined-Japanese-Patent No. 2011-126028 description.

  Note that the sizes of the line width (W2) of the IP element (7A) and the line width (W3) of the IP inversion element (7B) are the gauze-like line (6) and the gauze-like line (6). Preferably, it is larger than the width of the non-image line between the first pitch (P1) and the line width (W1), which exists between This is because IP elements (7A) and IP inversion elements (7B) are completely contained in non-image lines existing between adjacent frame-like lines (6), and are placed on the frame-like lines (6). If they do not overlap, those lines can not appear as a latent image under specular light.

  The latent image line group (5) having the IP element group (5A) and the IP inversion element group (5B) configured as described above has a color different from the color emitted by the wrinkled line (6) under specular light. It needs to be. This property is necessary to visualize the latent image with constant contrast under specular light. Moreover, since it is preferable that the latent image line group (5) is invisible under the diffuse reflection light, it is preferable that the latent image drawing group (5) be transparent, semitransparent, or light in color. The term “translucent” as used herein is not completely transparent, but completely exists in the lower layer of the latent image line group (5), ie, the wrinkled line (6) and the substrate (2). It refers to the state of transparency that does not hide.

  In addition, the latent image line group (5) prevents light from being incident on the wrinkled line group (4) existing below the latent image line group (5) under the specular reflection light, resulting in printing In order to create the strength of the reflected light in the image area (3) to make the basic image (8) appear, it is preferable to have low gloss (mat) or have excellent light blocking properties. In the latent image group (5), although bright and dark flip flops and color flip flops like the scaly line (6) are not essential, there is no problem if they have these properties.

  The latent image drawing line group (5) is not particularly required to be raised and may have a flat structure, but may have a rise. That is, it may be formed by offset printing, letterpress printing, flexographic printing, gravure printing, intaglio printing, screen printing or the like, and there is no problem even if it is formed by an ink jet printer, a laser printer or the like.

  The latent image line group (5) is superimposed on the wrinkled line group (4) having the above-mentioned configuration to form the latent image print (1) of the present invention. An example of the positional relationship of superposition of the eyelid-like drawing line group (4) and the latent image drawing line group (5), the effect in that case, and the principle of the effect will be described. FIG. 11 is a view in which a group of eyelid-like drawing lines (4) and a group of latent image drawing lines (5) overlap in an arbitrary positional relationship. As shown in FIG. 11, the IP element (7A) overlaps the left slope (A side slope) of one ridge line (6), and the IP inversion element (7B) on the right slope (A 'side slope). Is a latent image print (1) in an overlapping positional relationship.

  An effect when two element groups overlap in the positional relationship of FIG. 11 is shown in FIG. Under diffuse reflection light, the base image (8) does not appear in the print image area (3), and the latent image line group (5) is also invisible (not shown). On the other hand, the base image (8) appears under regular reflection light as shown in FIGS. 12 (a), 12 (b) and 12 (c), and the angle of the latent image print (1) is changed. The shape of the image (8) changes and a swaying motion occurs. A unique movement occurs continuously as if it sways in the water and shakes in waves.

  Note that “specular reflection” as referred to in this specification refers to a phenomenon in which strongly reflected light is generated at an angle substantially equal to the angle of incident light when light is incident at an incident angle to a substance. "Refers to a phenomenon in which, when light is incident on a substance at an incident angle, weak reflected light is produced at an angle different from the angle of the incident light. For example, in the case of iris colored pearl ink as an example, it appears colorless and transparent in the diffuse reflection state, but emits a specific interference color in the specular reflection state. Moreover, "observation under specular reflection light" refers to a state in which observation is made from a viewpoint at a reflection angle substantially equal to the angle of light incident on the print, and "observation under diffuse reflection light" refers to the print It refers to a state in which observation is performed at an angle that is largely different from the angle of light incident on the. For example, FIG. 12 and FIG. 14 which will be described later are in a state where they are viewed from the viewpoint (11) at an angle greatly different from the angle of the light incident on the latent image print (1) from the light source (10). It is a figure which points out the state observed below, respectively.

  The principle of the above effect will be described. First, since there is no light directly incident on the scaly line group (4) and the latent image line group (5) under the diffuse reflection light, and no strong specular light is emitted. There is no color difference between the group (4) and the latent image group (5). Therefore, under the diffuse reflection light, the latent image line group (5) is completely invisible or almost invisible.

  On the other hand, under regular reflection light, the latent image line group (5) changes color largely due to the light and dark flip flop property, which is the optical characteristic of the eyelet group (4), or the color flip flop property. And a large color difference occurs, and the latent image line group (5) is visualized. However, since the eyelid-like drawing line (6) has a swell, the whole eyelid-like drawing line group (4) does not simultaneously reflect light, and the whole latent image line group (5) once It is not visible to Under specular light, only the surface of the drawing surface perpendicular to the incident light among the drawing surface of the gutter-shaped drawing line (6) strongly reflects light, and only that area is the gutter-shaped drawing group (4) and A large color difference occurs between the latent image lines (5). As a result, only the image information of the latent image line group (5) superimposed on the surface of the drawing line group (4) orthogonal to the incident light is sampled and visualized.

  Essentially, when the wrinkle-like line group (4) and the latent image line group (5) are formed at the same pitch and in the same arrangement direction as in the prior art, the base image is formed under the regular reflection light. (8) appears as it is, and changing the angle produces an effect of moving the base image (8) parallel to the arrangement direction. In this case, in the case where the IP element group (5A) is sampled and in the case where the IP inversion element group (5B) is sampled, the appearing base image (8) itself is the same but the motion direction is opposite Become.

  On the other hand, in the present invention, it is essential to form at least one of the pitch and the arrangement direction of the latent image line group (5) with respect to the wrinkled line group (4). Because the pitch and arrangement direction of the ridge-shaped line group (4) and the latent image line group (5) are different, the ridge-line group (4) and the latent image are arranged along the second direction (direction S2). The interference position of the object group (5) changes continuously. Therefore, in the case where the arrangement directions of the ridge-shaped line group (4) and the latent image line group (5) are different as shown in the embodiment, the first direction (the upper part of the print image area (3) The image of the latent image line group (5) on the side A of the direction S1) is sampled, and in the central portion of the print image area (3), the latent image line group (center of the first direction (direction S1) The image of 5) is sampled, and in the lower part of the print image area (3), the image of the latent image line group (5) on the A 'side in the first direction (S1 direction) is sampled. It occurs. In the latent image line group (5) of the present invention, two different images of the IP element (7A) and the IP inverting element (7B) are disposed in the first direction (S1 direction). The direction of movement is opposite. When the pitches of the wrinkled line group (4) and the latent image line group (5) are different, according to the phase of the latent image line group (5) in the first direction (direction S1), Since whether the IP element (7A) of the latent image group (5) is sampled or the IP inverting element (7B) is sampled changes, the change is continuous, so the latent image The direction and amount of movement of the drawing group (5) will change according to the phase in the first direction (S1 direction).

  Therefore, in the case where the arrangement directions of the ridge-shaped line group (4) and the latent image line group (5) are different as shown in the embodiment, the upper part of the appearing base image (8) moves to the right and the center Will stay in place and the lower part will move to the left. In addition, when the pitches of the wrinkle-like drawing line group (4) and the latent image drawing line group (5) are different, an effect of partial stretching or contraction occurs. For this reason, the shape of the base image (8) changes, not the moving image effect of the simple parallel movement as in the conventional case, and the moving image effect of the shaking motion occurs. The above is the principle on which the effects of the present invention occur.

  As described above, the configuration in which at least one of the pitch and arrangement direction of the latent image drawing group (5) is made different from the wrinkled drawing group (4) is intentionally used in the prior art. (Moire) is the same as the configuration that gives rise to. However, the "wobble" effect of the present invention is different from the "moire" which is generally used in the printing industry. The general moire is a phenomenon in which the density (the intensity of the interference fringes) of an image produced by the interference of two kinds of image lines slightly different in angle or slightly deviated in pitch changes. Then, this is integrated with the motion photography technology of integral photography method, and it is a phenomenon "swing movement" in which the direction and the amount of movement change continuously in each area, unlike the simple change of gradation like conventional moire. It has been sublimed as a special animated visual effect.

  The "swinging motion" which is a characteristic moving image effect of the present invention will be described with reference to FIG. As shown in FIG. 13 (a), the "swinging motion" referred to in the present specification is a bending of the original center line (L1), which is an image showing the center of the image, which should be straight. The basic image (8) appears with respect to the actual center line (L2) of the state, and by changing the observation angle, the second direction (S2 direction) which is the drawing direction of the ridge-shaped drawing group (4) ) Above, movement in which the direction of movement in the first direction (S1 direction) and the amount of movement change continuously, and the position of the original center line (L1) as shown in FIG. The base image (8) whose phase is shifted in the first direction (S1 direction) which is the arrangement direction with respect to the actual center line (L3) appears, and the observation angle is changed to obtain the base image (8). Motion in the first direction (S1 direction) in each of the regions having different phases in the first direction (S1 direction) It refers to the movement amount of the direction and movement changes continuously. The swinging motion of FIG. 13 (a) is an example of a remarkable motion when the angular direction α is provided by making the arrangement directions of the scissor-like drawing line group (4) and the latent image drawing line group (5) different. The swaying motion 13 (b) is an example of a remarkable motion when a pitch difference is provided between the ridge-like line group (4) and the latent image line group (5). It is assumed that the movement obtained by combining FIG. 13 (a) and FIG. 13 (b) is also "yaw movement". In the present specification, although both the movement of FIG. 13A and the movement of FIG. 13A are "swaying movement", the change of the base image (8) particularly with respect to the movement of FIG. 13A. In particular, it is called "a swing with a twist" because the movement is large and a more unique effect.

  Further, as in the present embodiment, not only one basic image (8) is arranged alone, but another latent image element group (5) prepared from another basic image (8) is arranged adjacent to one another. You may Furthermore, even in the same basic image (8), if the phase in the first direction (S1 direction) is shifted by about a half pitch (P1 / 2) of the first pitch (P1), the pairs appear In the base image (8 '), as shown in FIG. 14, a shaking motion that is exactly opposite to that of the base image (8) occurs. In this way, even with the same image, by arranging the pair of base images (8 ') adjacent to each other, the moving image effect is more easily recognized due to the opposite movement manner. preferable.

  It is to be noted that even when the printing alignment is deviated in the first direction (direction S1) from the positional relationship between the scoop-like line group (4) and the latent image line group (5) shown in FIG. As shown in the pair of base images (8 '), although the motions are opposite ones, a moving image effect of the same shaking appears visually. The effect in this case is that the observer can not recognize that the direction of the movement is the opposite unless it is directly compared with the latent image print (1) in which the printing registration is not misaligned. As described above, regardless of the positional relationship of imprinting in the first direction (direction S1) of the scaly line group (4) and the latent image line group (5), the same moving image effect as viewed visually is also generated. It is one of the features of the present invention.

  Hereinafter, examples of latent image printed matter specifically produced according to the above-described embodiment will be described in detail with reference to FIGS. 1 to 12 used in the embodiment. It is not limited to this embodiment.

  FIG. 1 shows a latent image print (1). FIG. 1 (a) is a front view of the latent image print (1), and FIG. 1 (b) is a line AA 'of the latent image print (1) shown in FIG. 1 (a). FIG. The latent image print (1) is formed by forming a print image area (3) on a substrate (2). As a substrate (2), a general white coated paper (Esprecoat FM Nippon Paper Industries) was used.

  An outline of the configuration of the print image area (3) of the present invention is shown in FIG. The print image area (3) has a ridge-shaped line group (4) and a latent image line group (5). The latent image drawing line group (5) has an IP element group (5A) and an IP inversion element group (5B), each having the same cherry blossom petals as a base image (8).

  FIG. 4 shows a latent image drawing line group (5), which is composed of two element groups of an IP element group (5A) and an IP inverting element group (5B). FIG. 5 shows an IP element group (5A), and an IP element (7A) with a line width (W2) of 0.2 mm in a third direction (S3 direction) and a second pitch (P2) 0 It was arranged and arranged in a line at 4 mm. Further, FIG. 6 shows an IP inversion element group (5B), and an IP inversion element (7B) with a line width (W3) of 0.2 mm in a third direction (S3 direction) has a second pitch (P2). ) 0.4 mm and arranged in a line. A latent image line group (5) was constructed by arranging these elements alternately and continuously by shifting the phase by 0.2 mm in the first direction (S1 direction) so as not to overlap each other. The frame (not shown) of the IP image line in the present embodiment has a width of 4 mm in the third direction (S3 direction), and a height (H) in the fourth direction (S4 direction) of 6 mm. The compression rate in the (S3 direction) was 0.05.

  First, the two images of the above configuration were printed on the substrate (2) by a screen printing method using a UV drying method for forming a group of wrinkled lines (4). As the ink, UV screen ink shown in Table 1 was used. The ink is translucent under diffuse light and emits a green interference color under specular light. Subsequently, the latent image drawing line group (5) was printed on the wrinkled drawing line group (4) by a UV drying offset printing method. The ink used was a transparent matte varnish (Matt Medium T & K TOKA). In addition, the height of the ridge-like streaks (6) was about 12 μm. The positional relationship of the overlapping of the two element groups was superimposed in the positional relationship as shown in FIG.

  The effect of the latent image printed matter (1) of the present invention produced according to the above procedure was confirmed. Under diffuse light, cherry petals did not appear in the printed image area (3) and were completely invisible (not shown). On the other hand, a gray cherry petal appears in a background exhibiting a green color which is an interference color of a pearl pigment under regular reflection light, and latent as shown in FIGS. 12 (a), 12 (b) and 12 (c). When the image print (1) was tilted, the gray cherry petals swayed in the green background, and a moving image effect appeared to be seen. As described above, it has been confirmed that the base image (8) appears under regular reflection light, and the moving image effect that appears to shake is generated by changing the inclination.

DESCRIPTION OF SYMBOLS 1 latent image printed matter 2 base material 3 printing image area 4 ridged drawing line group 5 latent image drawing line group 5A IP element group 5B IP inversion element group 6 ridged drawing line 7A IP element 7B IP inversion element 8 base image 8 'pair Base image 9A, 9B frame 10 light source 11 observer's point of view

Claims (2)

At least a portion of the substrate comprises a print image area,
The printed image area is a ridged line in which ridged lines having at least one of bright and dark flip-flops and / or color flip-flops are arranged in a line at a first pitch in a first direction. On the group, a latent image drawing line group having a color different from the color of the ridge-like drawing line under the specular reflection light is laminated,
In the latent image group, a plurality of IP elements obtained by compressing an image obtained by dividing an original image at a predetermined reduction ratio are arranged in a line shape at least one of which is different from the direction or the pitch of the ridge line. IP elements,
A plurality of IP inversion elements formed by mirroring the plurality of IP elements have IP inversion elements arranged in a line in the order divided by the same direction and pitch as the IP elements,
The IP element and the IP inverting element are arranged without alternately overlapping,
When observed under specular light, the above-mentioned base image appears,
The latent image printed matter is characterized in that the base image is shaken and recognized according to an observation angle.   The base image has a twist when the observation angle is continuously changed by arranging a plurality of the IP elements in a direction and a pitch different from that of the ridge-like drawing line. The latent image printed matter according to claim 1, which is visually recognized as shaking.

Images