JP7089248B2 - Latent image printed matter using brilliant expression structure and brilliant expression structure - Google Patents

Description

The present invention has high brightness and saturation in the field of security printed matter such as banknotes, passports, securities, identification cards, cards, and toll tickets that require anti-counterfeiting effect, and has excellent durability. The present invention relates to a brilliant expression structure and a latent image printed matter using the brilliant expression structure, which are image lines having a forgery-like shape.

Security products such as banknotes, passports, securities, and ID cards are required to be resistant to forgery and falsification, and therefore various anti-counterfeiting technologies are adopted. As a typical example of these, holograms are known as a technique capable of visually discriminating authenticity. Since the hologram has an image changing effect in which a plurality of images appear by changing the observation angle, it is easy to attract attention and a high anti-counterfeiting effect can be obtained.

However, unlike the conventional anti-counterfeiting technique that can be formed by printing, the hologram is formed by using a complicated manufacturing process and a special material, so that the manufacturing process is complicated as compared with the conventional printing technique. , The manufacturing cost was high, and the applicable products were limited.

Therefore, the Applicant has formed a mirror-like glossy gem-like image regularly at a constant pitch and a constant image width, and changes the arrangement direction of the image lines in the image portion and the background portion to diffuse the image. Under reflected light, it is observed as an image with uniform brightness, but under normal reflected light, a printed matter that can be used to determine the authenticity of the latent image image due to the difference in the amount of reflected light generated from the latent image portion and the background portion. (See, for example, Patent Document 1).

This is because the printed matter of Patent Document 1 utilizes the fact that a strong mirror gloss is generated from the surface of the Kamaboko-shaped image line, so that the amount of reflected light generated from the latent image portion and the background portion differs depending on the observation angle. It is essential to obtain a strong amount of reflected light. Therefore, a water- and oil-repellent treatment is required to orient the glittering material on the surface of the semi-cylindrical image, which increases the cost and the glitter pigment formed on the surface of the image has abrasion resistance and the like. There was a problem with the robustness of.

Therefore, the applicant has applied at least one polyfunctional UV-curable oligomer and at least one UV-curable monomer as a bright ink composition for UV-curable screen printing that forms a scab-like image line containing a bright pigment. A bright ink composition for ultraviolet curable screen printing having at least a photopolymerizable compound, a photopolymerization initiator, and a bright pigment, which has a silicone-based compound and / or a fluorine-based compound on the surface layer of the bright pigment. An application has been filed for a bright ink composition for ultraviolet curable screen printing containing the above (see, for example, Patent Document 2).

In addition, the applicant has formed a latent image element having a different amount of reflected light on a base material that strongly reflects light as a special latent image image body using a sword-shaped image line, and further has a light transmitting property on the latent image element. By forming the scab-like element, the amount of light reflected from the surface of the base material that the light source incident on the stalk-like element strongly reflects the light formed in the lower layer and the amount of reflected light from the latent image element formed in the upper layer thereof. An application has been filed for a special latent image image forming body capable of giving a change effect of an image and a change dynamically to an image by selectively observing the image (see, for example, Patent Document 3).

Japanese Unexamined Patent Publication No. 2004-209646 Japanese Patent No. 6186620 Japanese Patent No. 6300101

However, although the bright ink composition for ultraviolet curable screen printing of Patent Document 2 can obtain high brightness and saturation from the surface of a scabbard image, the reproducible hue is limited to the hue of the bright pigment. Therefore, there is a limit to the visibility of the latent image.

Further, in the special latent image forming body of Patent Document 3, in order to obtain a high brightness difference, it is necessary to prepare a base material that strongly reflects light or to form a reflective layer that obtains high reflected light on the surface of the base material. Therefore, the base material is limited or the reflective layer needs to be formed separately, which leaves a problem in terms of cost or manufacturing process.

An object of the present invention is to solve such a conventional problem, that a high change effect and a dynamic effect can be obtained, the color expression is rich, and the visibility of the latent image is excellent. Provided is a brilliant expression structure capable of forming a latent image printed matter.

The brilliant expression structure of the present invention has a brilliant glamorous element group in which a plurality of brilliant gem-like elements are regularly formed at a predetermined pitch on at least a part of the substrate, and the brilliant glamorous element is formed. The group consists of a light-reflecting layer in which a plurality of scab-shaped light-reflecting elements formed by a bright ink are arranged, and a plurality of light-transmitting coloring elements formed by a light-transmitting colored ink on the light-reflecting elements. It is composed of a light transmitting colored layer, and the light reflecting layer has a 60 ° gloss of 32 or more, and the light transmitting colored layer has a 60 ° gloss lower than that of the light reflecting layer, and the difference is 20 or less. It is a characteristic brilliant expression structure.

Further, in the brilliant expression structure of the present invention, the height of the brilliant scab-like element is 3 μm to 50 μm, the brightness L * is 210 or more, and the saturation C * ab is the saturation of only the light reflecting layer. It is a brilliant expression structure characterized by being 3 or more higher than C * ab.

Further, in the image region of the latent image printed matter in which the latent image image is formed by the brilliant expression structure of the present invention, the brilliant hump-like elements having a predetermined pitch and image width are formed in a universal line shape along the first direction. The first group of glittering glamorous elements arranged and the glittering glamorous elements having the above-mentioned predetermined pitch and image width described above along a second direction different from the first direction are arranged in a universal line. When the latent image printed matter is observed under diffuse reflection light, the first bright gem-like element group and the second bright gadget-like element group are visually recognized as having the same density. When observed under normal reflected light, the latent image is visually recognized due to a difference in the amount of reflected light between the first bright gem-like element group and the second bright gem-like element group. It is an image printed matter.

Further, it is a latent image printed matter in which an image region having a latent image is formed by the brilliant expression structure of the present invention, and the image region is a brilliant limb on a group of brilliant limb-like elements under normal reflected light. When a latent image element group having a color different from that of the shape element group and in which a plurality of latent image elements obtained by dividing and / or compressing the basic image are arranged is formed and the latent image printed matter is observed under normal reflected light. The latent image is visually recognized due to the difference in color from the surface of the brilliant scabbard element group and the latent image element group, and further, when observed at different observation angles of the latent image printed matter under normal reflected light, the latent image is latent. It is a latent image printed matter characterized in that the image is changed and visually recognized.

Further, it is a latent image printed matter in which an image region having a latent image is formed by the brilliant expression structure of the present invention, and the image region is a brilliant 蒲 鉾 formed in the shape of the base image which is the base of the latent image. A latent image element group is formed on which a plurality of latent image elements having a color different from that of the brilliant gambling element group under normal reflected light and having a divided or divided base image are arranged. , The latent image element is formed so as to have a different shape along a specific direction within the range of the brilliant scabbard element group formed in the shape of the base image, and the latent image printed matter is formed under normal reflected light. When visually recognized, the latent image is visually recognized due to the difference in color from the surface of the brilliant scabbard element group and the latent image element group, and further, the observation angle of the latent image printed matter is changed under normal reflected light. It is a latent image printed matter characterized in that when observed, the latent image is visually recognized by changing along a predetermined direction within the range of the glittering scabbard element group.

The brilliant expression structure of the present invention is different from the semi-cylindrical strokes formed by the prior art, and has high lightness and saturation, and can form a brilliant semi-cylindrical element group formed by any coloring. Therefore, when applied to printed matter such as Patent Documents 1 and 3, the visibility of the latent image is high, a smooth dynamic image or a change image can be visually recognized, and the latent image has an excellent color expression. Image prints can be provided. Further, since the light-transmitting colored layer serves to protect the light-reflecting layer, the light-reflecting characteristics can be maintained and the durability is excellent.

The figure which shows an example of the brilliant expression structure of this invention. The figure which shows an example of the composition of the brilliant Kamaboko-like element. The figure which shows an example of the relationship between a light reflection layer and a light transmission coloring layer. The figure explaining the reflected light which is visually recognized by the arrangement angle of the brilliant Kamaboko-shaped element. The figure which shows the expression principle about the optical property of a brilliant expression structure. The figure which shows the principle that the reflected light is expressed from the brilliant Kamaboko-like element. The figure which shows the comparative example which does not have a light transmission colored layer. The figure which shows the comparative example which compounded the color pigment in the light reflection layer itself. The figure which shows the comparative example which formed the light-transmitting colored layer on the base material, and formed the light-reflecting layer on it. The figure which shows an example of the 1st latent image printed matter which applied the brilliant expression structure of this invention. The figure which shows an example of the 2nd latent image printed matter which applied the brilliant expression structure of this invention. The figure which shows the relationship between the light transmission colored layer and the latent image element group formed on the light reflection layer. The figure which shows the composition of the brilliant latent image element. The figure which shows the positional relationship between the brilliant kamaboko element and the latent image element. The figure which shows an example of the 3rd latent image printed matter which applied the brilliant expression structure of this invention. The figure which shows the composition and the evaluation result of the visibility of the screen ink and the offset ink used for the brilliant expression structure of Comparative Examples 1 and 2 from Examples 1 to 4. The figure which shows the composition and the evaluation result of the visibility of the screen ink and the offset ink used for the brilliant expression structure of Example 5 and Comparative Example 3. FIG. The figure which shows the composition and the evaluation result of the visibility of the screen ink and the offset ink used for the brilliant expression structure of Example 6, Comparative Examples 4 and 5. The figure which shows the composition of the screen ink and the offset ink used for the brilliant expression structure of Example 7 and Comparative Example 6, and the evaluation result of the visibility. The figure which shows the composition and the evaluation result of the visibility of the screen ink and the offset ink used for the brilliant expression structure of Example 1, Comparative Examples 1, 7 and 8. The figure which shows the latent image image visually recognized by the observation condition in the latent image printed matter of Example 8. FIG. The figure which shows the latent image image visually recognized by the observation condition in the latent image printed matter of Example 9. FIG. The figure which shows the latent image image visually recognized by the observation condition in the latent image printed matter of Example 10.

A mode 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 in the claims.

(First embodiment)
The configuration of the brilliant expression structure (1) in the first embodiment will be described with reference to FIG. The brilliant expression structure (1) is a structure in which a brilliant kamaboko-like element (3) is formed on a base material (2). The base material (2) is not particularly limited as long as it can be printed, and high-quality paper, coated paper, film or the like is used. The height (T1) of the glittering kamaboko element (3) is from 3 μm to 50 μm, more preferably from 5 μm to 30 μm. This is because when the thickness is 3 μm or less, the surface of the element does not have a shape having a sufficiently semi-cylindrical curved surface, and it is difficult to visually recognize the difference in glossiness depending on the observation angle. Further, if it is 50 μm or more, the printability is inferior. The width of the element (W1) is from 50 μm to 1000 μm, more preferably from 100 μm to 600 μm. If the height is 50 μm or less, it is difficult to make the height of the bright kamaboko element (3) 3 μm or more, and if it is 1000 μm or more, the bright kamaboko element (3) approaches a trapezoid rather than a shape having a kamaboko-shaped curved surface. This is because it is difficult to visually recognize the difference in glossiness depending on the observation angle. It should be noted that the hump-shaped shape in the present invention is not limited to the cross-sectional shape shown in FIG. There may be.

The lightness L * and the saturation C * ab of the brilliant scab-like element (3) form a uniform light reflection layer (4) having a height of about 20 μm in a region of 20 mm in length × 40 mm in width, and are on the reflection layer. A region in which a uniform light-transmitting colored layer (5) having a length of 20 mm, a width of 40 mm, and a height of about 1 μm is formed is incident light with a variable-angle spectroscopic colorimeter (Murakami Color Technology Research Institute _GCMS-4 type). The value was taken as the value at 45 ° of the reflected light with respect to 45 °. At this time, the brightness L * needs to be 210 or more. This is because when the brightness L * is 210 or less, glossy visibility cannot be obtained. Further, the saturation C * ab needs to be 3 or more than the saturation C * ab of only the light reflecting layer. This is because when the value is 3 or less, the hue cannot be visually recognized as if it became vivid.

The configuration of the brilliant kamaboko-shaped element (3) will be described with reference to FIG. As shown in FIG. 2A, the brilliant kamaboko-like element (3) has a light-reflecting layer (4) having a surface gloss and a light-transmitting colored layer (5) that transmits light to the upper layer of the light-reflecting layer (4). ) Are laminated.

(Light reflecting layer)
The light reflecting layer (4) can be formed by screen printing or flexographic printing of bright ink. In order to further enhance the surface gloss, it is desirable to screen-print the ultraviolet curable ink, and in order to further enhance the brilliance, the brilliant pigment (14) can be blended as shown in FIG. 2 (b). .. As the brilliant pigment, known scaly brilliant pigments such as scaly pearl pigments, scaly metal pigments, glass flake pigments, and cholesteric liquid crystal pigments can be used.

The light reflection characteristic of the light reflection layer (4) is that a uniform light reflection layer (4) having a height of about 20 μm is formed in a region of 20 mm in length × 40 mm in width, and the region is used as a gloss meter (BYK _microtri). It is necessary that the glossiness of 60 ° measured by gloss) is 32 or more. This is because if the glossiness is less than 32, a sufficient brilliance feeling cannot be obtained.

(Light transmission colored layer)
The light transmission colored layer (5) can be formed by offset printing, inkjet printing, gravure printing, or the like for coloring ink. As the coloring ink, any ink such as an ultraviolet curable type and an oxidative polymerization type can be used.

The light transmission characteristic of the light transmission colored layer (5) is that a uniform light reflection layer (4) having a height of about 20 μm is formed in a region of 20 mm in length × 40 mm in width, and the light reflection layer (4) is 20 mm in length. × The 60 ° value measured by a gloss meter (BYK_microtrigloss) in the region where a uniform light-transmitting colored layer (5) with a width of 40 mm and a height of about 1 μmm was formed, and the light-reflecting layer (4). ) Is set by the difference in the glossiness values, and the glossiness difference is required to be 20 or less, more preferably 10 or less. This is because when the difference in glossiness is more than 20, the light transmission is weak and the brightness is lowered, so that a sufficient glossiness cannot be obtained.

Next, the relationship between the light reflecting layer (4) and the light transmitting colored layer (5) will be described with reference to FIG. For the sake of explanation, the shape of the light reflecting layer (4) will be described as an ellipse. A configuration in which a light reflecting layer (4) is formed on a base material (2) as shown in FIG. 3 (a) to form a light transmitting colored layer (5) having the same shape as the light reflecting layer (4), and FIG. A configuration in which a significant image is formed on the light transmitting colored layer (5) as shown in (b), and a configuration in which a light transmitting colored layer (5) is formed in a shape different from that of the light reflecting layer (4) as shown in FIG. 3 (c). , The configuration in which the light transmitting colored layer (5) is formed with a plurality of different hues as shown in FIG. 3 (d) and the like can be mentioned.

Next, the difference in the reflected light generated by the arrangement angle of the brilliant kamaboko-shaped element (3) will be described with reference to FIG. As shown in FIG. 4, when the observation position and the light source position are constant with respect to the brilliant kamaboko element (3), the brilliant kamaboko element (3) is arranged at a different angle due to the characteristics of the image line shape. The direction of light reflected is different. When the image angle in the direction perpendicular to the light source (6) and the observation position (7) is set to 0 °, the reflected light appears in the direction of 0 °. On the other hand, when the image angle in the direction parallel to the light source and the observation position (7) is set to 90 °, the reflected light is expressed in the direction of 90 °. The amount of reflected light from 3) is observed to be relatively different.

FIG. 5 describes the relationship of the reflected light when the position of observing the brilliant kamaboko element (3) is fixed and the position of the light source (6) is moved with respect to the brilliant kamaboko element (3). It is a figure. As shown in FIG. 5, when the observation position is fixed with respect to the brilliant kamaboko element (3) and the light source position is smoothly changed from the position A to the position B, the curved surface of the brilliant kamaboko element (3) is formed. The reflected light moves smoothly.

FIG. 6 is a diagram showing a state in which a light source incident on the glittering kamaboko element (3) is reflected. FIG. 6B is an enlarged view of the broken line portion of FIG. 6A, and is shown as a horizontal plane for explanation. The reflected light (L1) is transmitted through the light transmitting colored layer (5) and reflected by the surface portion of the light reflecting layer (4) with respect to the incident light (L0), and the reflected light (L2) is light. The light incident on the brilliant pigment (14) existing in the reflective layer (4) is reflected, and the reflected light (L3) is the reflected light reflected from the surface of the light transmitting colored layer (5). High brightness (L * 210 or more) can be obtained by the sum of the reflected light (L1, L2, L3), and the reflected light (L1) is the light transmitted colored layer (5) from the light reflecting layer (4). By passing through the above, it has high saturation, and when the bright pigment (14) is blended, highly saturated reflected light L2 from the bright pigment (14) can be obtained, so that the saturation is high. C * ab is 3 or more larger than the saturation C * ab of only the light reflecting layer (4). Further, since the light transmitting coloring layer (5) is laminated on the light reflecting layer (4) containing the brilliant pigment (14), the effect of preventing the brilliant pigment (14) from being detached can also be obtained.

FIG. 7 is a diagram showing a comparative example having no light transmitting colored layer (5). With respect to the incident light (L0), the reflected light (L1) is the reflected light reflected on the surface of the light reflecting layer (4'), and the reflected light (L2) is the reflected light from the bright pigment (14). .. In the light reflecting layer (4'), the bright pigment (14') inside the light reflecting layer (4') is obtained as compared with the case where the strong reflected light L1 (60 ° gloss of 32 or more) is obtained from the layer surface by surface reflection. ), The reflected light L2 becomes weak. Therefore, the relationship is L1 >> L2, and since L1 has no saturation, the reflected light having low saturation is visually recognized as a whole.

FIG. 8 is a diagram showing a comparative example in which a coloring pigment is blended in the light reflecting layer (4 ″) itself. The reflected light (L1) is the reflected light reflected on the surface of the light reflecting layer (4 ″) with respect to the incident light (L0), and the reflected light (L2) is the reflected light from the bright pigment (14). be. In the light reflecting layer (4 ″), the bright pigment inside the light reflecting layer (4 ″) is obtained as compared with the case where the strong reflected light L1 (60 ° gloss of 32 or more) is obtained from the layer surface by surface reflection. The reflected light L2 from (14) is weakened by being blocked by the coloring pigment. Further, although the light reflecting layer (4 ″) contains a coloring pigment inside, it has poor light transmission due to the presence of the coloring pigment and the brilliant pigment (14), and the light reflecting layer (4 ″) has poor light transmission. Since strong reflected light cannot be obtained from the surface of the base material which is the lower layer, strong reflected light does not pass through the light reflecting layer (4 ′ ′), so that high saturation cannot be obtained.

FIG. 9 is a diagram showing a comparative example in which a light transmitting colored layer (5') is formed on a base material (2) and a light reflecting layer (4''') is formed on the light transmitting colored layer (5'). The reflected light (L1) is the reflected light reflected on the surface of the light reflecting layer (4 ″ ″) with respect to the incident light (L0), and the reflected light (L2) is the reflected light from the bright pigment (14). The reflected light (L3) indicates the reflected light from the light transmitting colored layer (5'). In the light reflecting layer (4 ″ ″), the inside of the light reflecting layer (4 ″ ″) is compared with the case where strong reflected light (L1) (60 ° gloss of 32 or more) is obtained from the layer surface by surface reflection. The reflected light (L2) from the brilliant pigment (14) is weakened. Further, since the light transmitting colored layer (5') is provided under the light reflecting layer (4'''), strong reflected light does not pass through the light transmitting colored layer (5'), which is high. I can't get the saturation.

The expression principle for obtaining reflected light having high brightness and saturation from the brilliant kamaboko element (3) of the present invention has been described above, but by using this brilliant kamaboko element (3), the visibility is extremely high. It is possible to provide a latent image printed matter (8) that exhibits a high change image or a dynamic change.

Next, an example of a latent image printed matter (8) to which the brilliant expression structure (1) of the present invention is applied will be described with reference to FIG. In FIG. 10, two bright kamaboko-like element groups (9) are formed on the base material (2). Each brilliant kamaboko element group (9) is composed of a collection of brilliant kamaboko elements (3) formed along the same direction, and two brilliant kamaboko element groups (9-) having different arrangement directions. 1, 9-2) is formed.

Each bright kamaboko element group (9-1, 9-2) is composed of a plurality of bright kamaboko elements (3) formed along different angles, but has the same pitch and line width. Since it is formed of the brilliant kamaboko element (3), as described in FIG. 4, there is a difference in brightness in each brilliant kamaboko element group (9) visually recognized as a uniform density depending on the observation angle. It occurs, and the image changes and can be visually recognized. Although the configuration of the latent image printed matter (8) can obtain a certain effect even with the light reflecting layer (4', 4', 4'") of the comparative example, the brilliant expression structure (1) of the present invention can be obtained. By using it, it is possible to observe a change image having high brightness and saturation. Due to these synergistic effects, it is possible to provide a latent image printed matter (8) with high visibility.

Next, as a second application example, an example of a latent image printed matter (8') in which a latent image image is dynamically visually recognized depending on an observation angle will be described with reference to FIG. 11. As shown in FIG. 11A, a light reflecting layer (4) is formed on the base material (2), a light transmitting colored layer (5) is laminated on the light reflecting layer (4), and further light transmitting coloring is performed. It is a configuration in which a latent image element (10) is laminated on a layer (5). Further, as shown in FIG. 11B, a light reflecting layer (4) is formed on the base material (2), a latent image element (10) is laminated on the light reflecting layer (4), and a latent image is further formed. The same effect can be obtained by laminating the light transmitting colored layer (5) on the element (10).

The relationship between the light reflecting layer (4) and the light transmitting colored layer (5) will be described with reference to FIG. For the sake of explanation, the shape of the light reflecting layer (4) will be described as an ellipse. As shown in FIG. 12 (a), a light reflecting layer (4) is formed on the base material (2), a light transmitting colored layer (5) is formed in the same shape as the light reflecting layer (4), and further light is formed. A configuration in which the latent image element group (11) is formed in a shape different from that of the reflective layer (4) and the light-transmitting colored layer (5), and as shown in FIG. 12 (b), light is transmitted on the light-transmitting layer (4). Examples thereof include a configuration in which the colored layer (5) and the latent image element group (11) are formed in the same shape. The latent image element group (11) is a form in which a plurality of latent image elements (10) are assembled.

The structure of the latent image element group (11) will be described with reference to FIG. The latent image element group (11) is a composite image line for exhibiting effects such as image change, animation, and stereoscopic vision using a lenticular lens. As an example, the cherry blossom pattern shown in FIG. 13 (a) is used as a base image (12), and a synthetic image (13) created so as to exhibit an animation effect that can be visually recognized by moving in the S1 direction is shown in FIG. 13 (b). .. Each latent image element (10) forming the composite image (13) is dynamically formed on the brilliant kamaboko-like element (3) constituting the brilliant expression structure (1) of the present invention. It creates change. Even in the case of the latent image element group (11) formed by compressing the basic image described in Japanese Patent No. 5138719 (not shown), the brilliant expression structure (1) of the present invention is used. It is possible to obtain a dynamic effect with high visibility.

FIG. 14 is a diagram illustrating the positional relationship between the brilliant kamaboko-shaped element (3) and the latent image element (10). The glittering kamaboko element (3) is a latent image element synthesized in a region formed by a constant pitch (P1) and a width (W1) with the same image pitch (P1) as the glittering kamaboko element (3). It is a structure formed by laminating (10) in parallel. That is, one latent image element (10) is laminated corresponding to one bright kamaboko-shaped element (3).

As described above, by forming the latent image element (10) on the bright kamaboko element (3), the region where the surface of the bright kamaboko element (3) is exposed and the latent image element (10) are formed. Since a large difference in brightness and color occurs in the laminated region, the position of the light incident on the curved surface of the Kamaboko-shaped element (3) has a large difference in brightness and color, and the position of the light incident on the curved surface of the Kamaboko-shaped element (3) changes. 3) The position where the latent image element (10) formed on the top is selected changes, and a dynamic latent image image is visually recognized. By using the brilliant expression structure (1) of the present invention in this configuration, it is possible to provide a latent image printed matter (8') having high brightness and saturation and exhibiting dynamic changes.

Next, as a third application example, FIG. 15 shows an example of a latent image printed matter (8 ′ ′) in which the latent image image existing in the contour region (15) is dynamically deformed and visually recognized depending on the observation angle. It will be explained using. As shown in FIG. 15 (a), the third application example has a configuration in which a latent image image is formed in the contour region (15) of the base image (12), as shown in FIG. 15 (b). The base image is divided and compressed, and the latent image element (10') is deformed along the first direction (S1) to form the image.

The formation position of the latent image element (10') and the stacking order with the light transmitting colored layer (5) are the same as in the second application example described above, and may be on the light reflecting layer (4). Even if it is formed on the light transmitting colored layer (5) formed on the light reflecting layer (4), a sufficient dynamic change effect of the latent image can be obtained. Further, the relationship between the latent image element (10') and the brilliant kamaboko element (3) is the same as that of the second latent image printed matter (8'), and one brilliant kamaboko element (3) has one. Two latent image elements (10') are stacked correspondingly.

When this latent image printed matter (8 ′ ′) is observed under diffuse reflected light, there is no difference in the amount of reflected light between the surfaces of the brilliant glamorous element (3) and the latent image element (10 ′). Only the element (3) is observed, but when the latent image printed matter (8 ″) is observed under normal reflected light, the latent image printed matter (8 ″) is observed in the contour region (15), and further. When the latent image printed matter (8') is visually recognized by changing the observation angle, the latent image image is dynamically deformed and visually recognized (not shown) in the contour region (15).

Examples of the brilliant expression structure (1) of the present invention will be described with reference to the drawings, but the brilliant expression structure (1) of the present invention is not limited to these examples and is claimed. As long as it is the scope of the technical idea in the description of the scope, it is not limited in any way.

(Example 1)
FIG. 16 shows the conditions of the screen ink for the light reflecting layer (4) and the offset ink for the light transmitting colored layer (5) used in the brilliant expression structure (1) of Examples and Comparative Examples. 16 (a) shows the conditions of the screen ink and the offset ink for producing the brilliant expression structure (1).

The brilliant expression structure (1) of Examples 1 to 4 is printed on the substrate (2) using the screen ink of each example, and then cured by UV irradiation (metal halide lamp) to form a light reflecting layer (a light reflecting layer (2). 4) was produced. Then, the light-transmitting colored layer (5) was overprinted on the light-reflecting layer (4) by offset printing, and then cured by UV irradiation (metal halide lamp) to develop the brilliant expression structure (1) of Examples 1 to 4. ) Was produced.

The base material used in the examples and comparative examples has a surface glossiness of 85 ° glossiness on a glossiness meter (BYK_microtrigloss) of 8.2, and a Beck-type smoothness of 145 seconds. High quality paper was used. For screen printing to form the light reflecting layer (4), a 250-line polymesh screen plate surface was used, and the screen ink was made into an ultraviolet curable resin having a viscosity of 1.0 Pa · s at 30 ° C. in the total amount of the ink. The ink was prepared by blending 6% by weight of Chromashine GD20-X (manufactured by Toyo Aluminum), which is an aluminum-based metal reflective pigment. As the ultraviolet curable resin, a mixed resin containing a urethane-based oligomer, an acrylate monomer, and Irgacure 184 (BASF) as a photopolymerization initiator as a main component and an auxiliary agent such as an antifoaming agent was used. The image design of the light reflecting layer was such that the image width of one image line was 400 μm, and the line pattern configuration was such that 50 image lines were gathered at an interval of 125 μm.

The light-transmitting colored layer (5) was printed using a dry offset plate surface. The offset ink used in each example was an ultraviolet curable offset ink, and the image design was formed as solid printing covering the light reflecting layer (4).

In Example 1, the light-reflecting layer (4) is completely covered with the UVL carton red (manufactured by T & K), which is the colored ultraviolet curable ink shown in FIG. 15 (a), on the light-reflecting layer (4) described above. As described above, the light-transmitting colored layer (5) was formed by solid printing by dry offset printing. The image height of the brilliant kamaboko-shaped element (3) of Example 1 was 20 μm.

(Example 2)
Example 2 has a configuration in which a light-transmitting colored layer (5) made of a colored ultraviolet curable ink is formed on a light-reflecting layer (4) as in Example 1, and the UVL shown in FIG. 16 (a) is used as an offset ink. A light transmitting colored layer (5) was formed using carton yellow. The image height of the brilliant kamaboko-shaped element (3) of Example 2 was 20 μm as in Example 1.

(Example 3)
Example 3 has a configuration in which a light-transmitting colored layer (5) made of a colored ultraviolet curable ink is formed on a light-reflecting layer (4) as in Examples 1 and 2, and is shown in FIG. 16 (a) as an offset ink. The light transmitting colored layer (5) was formed using the shown UVL carton indigo. The image height of the brilliant semi-cylindrical element (3) of Example 3 was 20 μm as in Examples 1 and 2.

(Example 4)
Example 4 has a configuration in which a light-transmitting colored layer (5) made of a colored ultraviolet curable ink is formed on a light-reflecting layer (4) in the same manner as in Examples 1 to 3, and is shown in FIG. 16 (a) as an offset ink. The light-transmitting colored layer (5) was formed using the UVLVECTA green shown in. The image height of the brilliant kamaboko element (3) of Example 4 was 20 μm as in Examples 1 to 3.

(Comparative Example 1)
In Comparative Example 1, the light reflecting layer (4) used in Examples 1 to 4 is used as it is. The image height of the brilliant semi-cylindrical element (3) of Comparative Example 1 was 19 μm.

(Comparative Example 2)
Comparative Example 2 has a configuration in which a light-transmitting colored layer (5) made of a colored ultraviolet curable ink is formed on the light-reflecting layer (4) as in Examples 1 to 4, and is shown in FIG. 16 (a) as an offset ink. The light-transmitting colored layer (5) was formed using the UVL Pantone yellow-green (manufactured by T & K) shown in the above. The image height of the brilliant semi-cylindrical element (3) of Comparative Example 2 was 20 μm.

FIG. 16 (b) shows the glossiness of the light reflecting layer (4), the difference in glossiness of the light transmitting colored layer (5), the brightness of the brilliant kamaboko element (3), the measurement results of the saturation, and the brilliant expression structure. The result of evaluating the visibility of (1) is shown. In the visibility evaluation of the brilliant expression structure (1), the light source (6) and the observation position (7) are fixed, and the brilliant feeling of the brilliant kamaboko-like element (3) when the base material (2) is tilted is visually observed. It was evaluated. The description of the evaluation is "○ indicates high brightness and saturation and a brilliant feeling can be visually recognized." "X indicates low brightness or saturation and the brilliant feeling is insufficient."

In the brilliant kamaboko-shaped elements (3) of Examples 1 to 4, each measured value (glossiness, glossiness difference, lightness, saturation) is within the specified range, and the brilliant expression structure (1) has a brilliant feeling. )Met. On the other hand, in Comparative Example 1, since the light-transmitting colored layer (5) was not provided, the saturation of the brilliant kamaboko-like element (3) was low, and the brilliant expression structure (1) was inferior in brilliance. Further, in Comparative Example 2, the difference in glossiness of the light-transmitting colored layer (5) was 20 or more, and the light-transmitting property was insufficient. The brilliant expression structure (1) was inferior to that of the above.

(Example 5)
The brilliant expression structure (1) of Example 5 will be described with reference to FIG. In the brilliant expression structure (1) of Example 5, the light reflecting layer (4) is formed by the screen ink shown in FIG. 17 (a), and the light transmitting colored layer (5) is formed by the offset ink. .. In Example 5, a screen ink containing 6% by weight of the brilliant pigment Chromashine GR20-X (manufactured by Toyo Aluminum) having a hue different from that of Examples 1 to 4 was used, but the formation of the light reflecting layer (4) was used. Since the method is the same as that of the first embodiment, the description thereof will be omitted.

(Comparative Example 3)
In Comparative Example 3, the light reflecting layer (4) used in Example 5 was used as it was.

FIG. 16 (b) shows the glossiness of the light reflecting layer (4), the difference in glossiness of the light transmitting colored layer (5), the brightness of the brilliant kamaboko element (3), the measurement results of the saturation, and the brilliant expression structure. The result of evaluating the visibility of (1) is shown. In the visibility evaluation of the brilliant expression structure (1), the light source (6) and the observation position (7) are fixed, and the brilliant feeling of the brilliant kamaboko-like element (3) when the base material (2) is tilted is visually observed. It was evaluated. The description of the evaluation is "○ indicates high brightness and saturation and a brilliant feeling can be visually recognized." "X indicates low brightness or saturation and the brilliant feeling is insufficient."

In Example 5, each measured value (glossiness, glossiness difference, lightness, saturation) was within the specified range, and the structure had a brilliant brilliance (1). On the other hand, in Comparative Example 3, since the light-transmitting colored layer (5) was not provided, the saturation of the brilliant kamaboko-like element (3) was low, and the brilliant expression structure (1) was inferior in brilliance.

(Example 6)
Next, the brilliant expression structure (1) of Example 6 will be described with reference to FIG. In the brilliant expression structure (1) of Example 6, the light reflecting layer (4) is formed by the screen ink shown in FIG. 18 (a), and the light transmissive colored layer (5) is formed by the same offset ink as in Example 1. Is formed. In Example 6, a screen ink containing 12.5% by weight of Color Stream T10-02 (manufactured by Toyo Aluminum K.K.), which is a light-transmitting bicolor pearl pigment shown in FIG. 18A, was used. Since the forming method of (4) is the same as that of the first embodiment, the description thereof will be omitted.

(Comparative Example 4)
In Comparative Example 4, the light reflecting layer (4) used in Example 6 was used as it was.

(Comparative Example 5)
Comparative Example 5 uses a screen ink containing 18% by weight of Color Stream T10-02 (manufactured by Toyo Aluminum), which is a light-transmitting bicolor pearl pigment used in the screen ink of Example 6, and reflects light. The layer (4) was formed, and the light transmitting colored layer (5) was not formed as in Comparative Example 4.

FIG. 18 (b) shows the glossiness of the light reflecting layer (4), the difference in glossiness of the light transmitting colored layer (5), the brightness of the brilliant kamaboko element (3), the measurement results of the saturation, and the brilliant expression structure. The result of evaluating the visibility of (1) is shown. In the visibility evaluation of the brilliant expression structure (1), the light source (6) and the observation position (7) are fixed, and the brilliant feeling of the brilliant kamaboko-like element (3) when the base material (2) is tilted is visually observed. It was evaluated. The description of the evaluation is "○ indicates high brightness and saturation and a brilliant feeling can be visually recognized." "X indicates low brightness or saturation and the brilliant feeling is insufficient."

In Example 6, each measured value (glossiness, glossiness difference, lightness, saturation) was within the specified range, and the structure had a brilliant brilliance (1). On the other hand, in Comparative Example 4, since the light-transmitting colored layer (5) was not provided, the saturation of the brilliant kamaboko-like element (3) was low, and the brilliant expression structure (1) was inferior in brilliance. Further, in Comparative Example 5, the saturation of the bright kamaboko element (3) could be increased by increasing the blending ratio of the bright pigment as compared with Comparative Example 4, but since there are many pigment components, light reflection The surface reflection of the layer (4) was hindered, the brightness became 210 or less, and the brilliant expression structure (1) was inferior in brilliance.

(Example 7)
Next, the brilliant expression structure (1) of Example 7 will be described with reference to FIG. In the brilliant expression structure (1) of Example 7, the light reflecting layer (4) is formed by the screen ink shown in FIG. 19 (a), and the light transmissive colored layer (5) is formed by the same offset ink as in Example 1. Is formed. In Example 7, as shown in FIG. 19A, the screen ink is not blended with the bright pigment, but the method for forming the light reflecting layer (4) is the same as that in Example 1. The explanation is omitted.

(Comparative Example 6)
In Comparative Example 6, the light reflecting layer (4) used in Example 7 was used as it was.

FIG. 19 (b) shows the glossiness of the light reflecting layer (4), the difference in glossiness of the light transmitting colored layer (5), the brightness of the bright kamaboko element (3), the measurement results of the saturation, and the brilliant expression structure. The result of evaluating the visibility of (1) is shown. In the visibility evaluation of the brilliant expression structure (1), the light source (6) and the observation position (7) are fixed, and the brilliant feeling of the brilliant kamaboko-like element (3) when the base material (2) is tilted is visually observed. It was evaluated. The description of the evaluation is "○ indicates high brightness and saturation and a brilliant feeling can be visually recognized." "× indicates insufficient brightness and / or saturation."

In Example 7, each measured value (glossiness, glossiness difference, lightness, saturation) was within the specified range, and the structure had a brilliant brilliance (1). On the other hand, in Comparative Example 6, since the light-transmitting colored layer (5) was not provided, the brilliant kamaboko-like element (3) had low saturation, and the brilliant expression structure (1) was inferior in brilliance.

In FIG. 20, a form having a different layer structure from the form of the present invention will be described. FIG. 20A shows the conditions of the screen ink and the offset ink for producing the brilliant expression structure (1). Example 1 in FIG. 20 (a) is the embodiment shown in FIG. 6, which is a configuration of the present invention. Comparative Example 1 has a configuration that does not have the light-transmitting colored layer (5) shown in FIG. 7. Comparative Example 7 does not have a light-transmitting colored layer (5) as shown in FIG. 8, but is a light-reflecting layer (a light-reflecting layer) in which offset ink is mixed with screen ink so as to have the same hue as in Example 2. It is a form in which 4) is formed. Comparative Example 8 is a form in which the light reflecting layer (4) is laminated on the light transmitting colored layer (5) shown in FIG.

In FIG. 20 (b), the glossiness of the light reflecting layer (4), the difference in glossiness of the light transmitting colored layer (5), the brightness of the brilliant kamaboko-like element (3), the measurement result of the saturation, and the brilliant expression structure. The result of evaluating the visibility of (1) is shown. In the visibility evaluation of the brilliant expression structure (1), the light source (6) and the observation position (7) are fixed, and the brilliant feeling of the brilliant kamaboko-like element (3) when the base material (2) is tilted is visually observed. It was evaluated. The description of the evaluation is "○ indicates high brightness and saturation and a brilliant feeling can be visually recognized." "X indicates low brightness or saturation and the brilliant feeling is insufficient."

The description of Example 1 and Comparative Example 1 described above will be omitted. Since Comparative Example 7 does not have the light-transmitting colored layer (5) as in Comparative Example 1, the brilliant kamaboko-like element (3) has low saturation and the brilliant expression structure (1) is inferior in brilliance. It became. In Comparative Example 8, since the light transmitting colored layer (5) is located under the light reflecting layer (4) and is different from the structure of the present invention, the brilliant expression structure (1) has low saturation and inferior brilliance. rice field.

From the above, by using the brilliant expression structure (1) having excellent brightness and saturation, the effect of changing the image and the expression of the latent image printed matter (8, 8', 8'') that is dynamically visually recognized. Since the effect can be improved, the configuration of the brilliant expression structure (1) of the present invention is indispensable in order to provide a latent image printed matter (8, 8', 8'') having a high anti-counterfeiting power. I understand.

(Example 8)
Next, a latent image printed matter (8) produced by using the brilliant expression structure (1) of Example 1 will be described. As shown in FIG. 3A, the latent image printed matter (8) of Example 8 has a glittering semi-cylindrical element (3) having a light-transmitting colored layer (5) formed on the entire surface of the light-reflecting layer (4). This is the one used, and a star-shaped latent image image (17) is formed as shown in the group of bright kamaboko elements (9-1, 9-2) arranged in different directions shown in FIG.

FIG. 21 shows the effect when the latent image printed matter (8) of Example 8 is observed under different conditions, and as shown in FIG. 21 (a), is a light source (8) with respect to the latent image printed matter (8). In the observation under so-called diffused reflected light, where the incident angle of the light incident from 6) and the observation angle of the latent image printed matter (8) are significantly different, the glittering hump-like element group (9-1) arranged at different angles. , 9-2) are visually recognized as a crimson visible image (16) having the same density, but from the incident angle of the light incident from the light source (6) and the latent image printed matter (8) as shown in FIG. 21 (b). In the observation under so-called normal reflected light, where the reflected light has almost the same reflection angle, the amount of reflected light from the brilliant scabbard element group (9-1, 9-2) arranged in different directions is observed differently. As a result, a star-shaped latent image (17) with high lightness and saturation was visually recognized. It should be noted that the brightness and chromaticity are compared with the case where the latent image printed matter (8) having the same configuration is produced by using the brilliant kamaboko element group (9) of Comparative Example 1 as it is, that is, the light reflecting layer (4). A high-degree latent image (17) was visually recognized.

(Example 9)
Next, an example of the latent image printed matter (8'), which is the second application example, will be described. In Example 9, the latent image printed matter (8') using the brilliant expression structure (1) of Example 2 and having the stacking order shown in FIG. 11 (a) and the configurations shown in FIGS. 12 (a) and 13 is shown. Was produced.

FIG. 22 shows the effect when the latent image printed matter (8') of Example 9 is observed under different conditions, and as shown in FIG. 22A, with respect to the latent image printed matter (8'). In the observation under so-called diffused reflected light, where the incident angle of the light incident from the light source (6) and the observation angle of the latent image printed matter (8') are significantly different, the surface of the brilliant hump-like element (3) and the brilliance Since there is no change in the reflected light from the surface of the latent image element (10) formed in the shape of a gem-like element (3), a yellow gauze-like image is observed as a visible image (16) having a uniform density. However, in the observation under so-called normal reflected light, the incident angle of the light incident from the light source (6) and the reflection angle of the light reflected from the latent image printed matter (8') are almost the same as shown in FIG. 22 (b). , The latent image image (17) due to the difference in the reflected light from the surface of the bright glamorous element (3) and the surface of the latent image element (10) formed in the form of the bright glamorous element (3). In addition, when observing under normal reflected light as shown in FIG. 22 (c), when the observation angle is slightly changed from the observation angle of FIG. 23 (b), the latent image image (17) dynamically appears. It was visually recognized. It should be noted that the specular reflection is compared with the case where the latent image printed matter (8') having the same configuration is produced by using the brilliant kamaboko element group (9) of Comparative Example 1, that is, the light reflecting layer (4) as it is. It was confirmed that the visual effect and the dynamic effect of the latent image image (17) visually recognized under light were significantly improved.

(Example 10)
Next, an example of the latent image printed matter (8 ′ ′), which is the third application example, will be described. In Example 10, the latent image printed matter (8 ″) using the brilliant expression structure (1) of Example 3 and having the stacking order shown in FIG. 11 (a) and the configurations shown in FIGS. 12 (b) and 15 is shown. ) Was produced.

FIG. 23 shows the effect when the latent image printed matter (8 ″) of Example 10 is observed under different conditions, and as shown in FIG. 23 (a), the latent image printed matter (8 ′ ′) is used. On the other hand, in the observation under so-called diffused reflected light, where the incident angle of the light incident from the light source (6) and the observation angle of the latent image printed matter (8') are significantly different, the surface of the brilliant scabbard element (3) and the surface. Since there is no change in the reflected light from the surface of the latent image element (10) formed in the shape of a brilliant scabbard element (3), the indigo light transmitting colored layer formed on the light reflecting layer (4) ( 5), that is, the visible image (16) that is the outline of the latent image image (17) is observed, but as shown in FIG. 23 (b), the incident angle of the light incident from the light source (6) and the latent image printed matter ( In the observation under so-called normal reflected light, where the reflection angle of the light reflected from 8') is almost the same, the surface of the glittering glamorous element (3) and the latent formed in the shape of the glittering glamorous element (3). Due to the difference in the reflected light from the surface of the image element (10), the latent image (17) appears, and further, in the observation under the normal reflected light as shown in FIG. 23 (c), FIG. 23 (b). When the observation was performed by slightly changing the observation angle from the observation angle of), the latent image image (17) existing in the contour region (15) was dynamically deformed into a small size and visually recognized. It should be noted that, as compared with the case where the latent image printed matter (8 ′ ′) having the same configuration is produced by using the brilliant scabbard element group (9) of Comparative Example 1, that is, the light reflecting layer (4) as it is, it is positive. It was confirmed that the visual effect and the dynamic deformation effect of the latent image image (17) visually recognized under the reflected light were significantly improved.

1 Glittering expression structure 2 Substrate 3 Glittering glamorous element 3-1, 3-2, 3-n Glittering glamorous element 4, 4 ′, 4 ″, 4 ″ ″ Light reflecting layer 5, 5 ′ Light-transmitting colored layer 6, 6'Light source 7 Observation position 8, 8', 8''Latent image printed matter 9 Glittering glamorous element group 9-1, 9-2, 9-n Glittering glamorous element group 10, 10 ´ Latent image element 11 Latent image element group 12 Group image 13 Synthetic image 14 Glitter pigment 15 Contour area 16 Visible image 17 Latent image image T1 Image line height P1 Image line pitch W1 Image line width L0 Incident light L1, L2, L3 reflected light

Claims (5)

It has a group of bright kamaboko-like elements in which a plurality of bright kamaboko-like elements are regularly formed at a predetermined pitch on at least a part of the substrate.
The brilliant scab-like element group includes a light-reflecting layer in which a plurality of scab-shaped light-reflecting elements formed by a brilliant ink are arranged, and light formed by a light-transmitting colored ink on the light-reflecting element. It consists of a light-transmitting coloring layer in which a plurality of transmission-coloring elements are arranged.
The 60 ° glossiness of the light reflecting layer is 32 or more, and the light reflecting layer has a glossiness of 32 or more.
The light-transmitting colored layer has a glossiness of 60 ° lower than that of the light-reflecting layer, and the difference is 20 or less. The brilliance according to claim 1, wherein the brilliant kamaboko-like element has a brightness L * of 210 or more and a saturation C * ab higher than the saturation C * ab of only the light reflecting layer by 3 or more. Sexual expression structure. A latent image printed matter in which an image region having a latent image is formed by the brilliant expression structure according to claim 1 or 2.
The image region includes a first group of glittering kamaboko elements in which the glittering kamaboko elements having a predetermined pitch and image width are arranged in a universal line along the first direction, and the first direction. It consists of a second group of bright kamaboko elements in which the bright kamaboko elements having the predetermined pitch and image width are arranged in a universal line along a second direction different from the above.
When the latent image printed matter is observed under diffuse reflected light, the first brilliant gem-like element group and the second brilliant gamo-like element group are visually recognized as having the same density, and are observed under normal reflected light. , A latent image printed matter, characterized in that a difference in the amount of reflected light occurs between the first brilliant glamorous element group and the second brilliant glamorous element group , and the latent image image is visually recognized.

A latent image printed matter in which an image region having a latent image is formed by the brilliant expression structure according to claim 1 or 2.
In the image region, a plurality of latent image elements obtained by dividing and / or compressing the base image are arranged on the glittering scab-like element group having a color different from that of the brilliant scab-like element group under specularly reflected light. The formed latent image element group is formed,
When the latent image printed matter is observed under normal reflection light, the latent image image is visually recognized due to a difference in color from the surface of the brilliant scabbard element group and the latent image element group, and further, the latent image is reflected. A latent image printed matter characterized in that when the latent image printed matter is observed at different observation angles under light, the latent image image changes and is visually recognized. A latent image printed matter in which an image region having a latent image is formed by the brilliant expression structure according to claim 1 or 2.
The image region has a color different from that of the glittering element group under normal reflected light on the glittering element group formed in the shape of the base image which is the base of the latent image. , A group of latent image elements in which a plurality of latent image elements obtained by dividing or compressing the basic image are arranged is formed.
The latent image element is formed so as to have a different shape along a specific direction within the range of the glittering kamaboko element group formed in the shape of the base image.
When the latent image printed matter is visually recognized under normal reflection light, the latent image image is visually recognized due to a difference in color from the surface of the brilliant scab-like element group and the latent image element group, and further, the latent image is reflected. When the latent image printed matter is observed at different observation angles under light, the latent image image is characterized in that it changes and is visually recognized along the predetermined direction within the range of the brilliant glamorous element group. Latent image printed matter.

Images