JP6873591B2 - Printed matter - Google Patents

Description

The present invention relates to printed matter having an anti-counterfeiting effect, and is specifically confirmed by an observer by an observation angle in fields such as printed media such as packages and product labels, banknotes, gift certificates and admission tickets, and securities such as stock certificates. It relates to printed matter having an optical effect in which the pattern to be produced changes.

In recent years, the damage caused by counterfeit products has been increasing worldwide, and effective anti-counterfeiting measures for securities such as banknotes, gift certificates, cash certificates, stock certificates, bonds, and packages and labels that protect the contents. And there is an increasing need to develop authenticity judgment measures.

Therefore, for example, an article may be labeled so that it can be confirmed that it is a genuine product. Examples of such anti-counterfeit labels include labels formed by fluorescent ink and functional ink such as OVI (optically variable ink), labels containing holograms or diffraction gratings, labels on which information is written by magnetic recording, and labels. There is a label containing an IC (integrated circuit) tag.

Many of these anti-counterfeit labels are difficult to counterfeit themselves. However, some anti-counterfeit labels can be relatively easily removed from the article to which they are affixed. Such labels can be used for fraudulent activities such as stripping from used articles and attaching them to counterfeit products.

As one of the measures to prevent such unauthorized use, the optical function required as an anti-counterfeiting effect is not given by attaching a label, but is directly printed or processed on the article. There is a method of giving with.

As the above-mentioned anti-counterfeiting and authenticity determination measures, there are those that perform a determination using a verifier (cover function) and those that perform a visual determination (oververt function) to determine authenticity.

As a judgment technology using a verifier, a latent image consisting of many lines or the like is embedded in a carrier to which an anti-counterfeiting function is desired, and a verification film is superimposed on the embedded latent image to visually recognize the embedded image. (For example, Patent Document 1) has been proposed.

On the other hand, as a technique for visually determining authenticity, for example, by forming a hologram on a carrier, a peculiar visual effect due to its fine structure is produced, and forgery prevention is performed based on the presence or absence of the visual effect. Techniques have been proposed (eg, Patent Document 2).

All of the anti-counterfeiting technologies shown above are effective anti-counterfeiting measures that exert a certain anti-counterfeiting effect. Since it is necessary to prepare each verification film according to the pattern of the embedded image, both the manufacturing process and the determination method become complicated and the authenticity determination is not easy. On the other hand, an anti-counterfeit medium that exerts a special visual effect by forming a hologram on a carrier does not require a special verifier to determine its authenticity, but is generally expensive for forming the hologram itself. Since special equipment and materials are required, an additional manufacturing process is required, and there is a problem that the cost performance related to manufacturing deteriorates.

Therefore, for example, the printed matter described in Patent Document 3 has been proposed as a printed matter which does not require a large cost for manufacturing the anti-counterfeit medium and can easily determine the authenticity.

Japanese Unexamined Patent Publication No. 2001-213042 Japanese Unexamined Patent Publication No. 2013-164491 Japanese Unexamined Patent Publication No. 6-155975

The printed matter described in Patent Document 3 is obtained by coating a resin layer made of a material such as varnish and a metallic luster layer having gloss on a base material such as paper in a predetermined pattern, and is a resin layer. The surface roughness is controlled by the method, and the characters on the uppermost layer can be visually recognized with the naked eye. However, when copying, the difference in reflectance due to the surface roughness between the area where the resin layer is provided and the area where the resin layer is not provided makes the copy. It is copied so that you can see that you did. If this configuration is used, in addition to the copy check paper, a specific visual effect is exhibited, so that it can be manufactured at low cost, and a dedicated verifier or the like is not required for its authenticity judgment. You can also do it. That is, as shown in FIG. 3, since the surface is provided with a specular reflection region and a diffuse reflection region to provide a difference in the reflection state of the surface, the observer 40 can observe the positively reflected light with respect to the light source 50. The specular reflection region and the diffuse reflection region can be recognized in a pattern when they are in a positional relationship.

However, in this method, since the metallic luster layer is provided by vapor deposition or the like, the surface of the metallic luster layer follows the surface shape of the varnish, and the outermost surface of the printed matter is the portion where the varnish is applied and the portion where the varnish is not applied. Since the roughness of the printed matter is significantly different, the presence of the pattern may be easily recognized when the printed matter is observed from the outside. Further, in the case where the print receiving layer is not provided, when the printed matter is touched, the existence of the pattern may be easily recognized due to the difference in surface roughness and the step.

The present invention has been made in view of the above problems, the formation of the printed matter itself does not require a large manufacturing cost, the authenticity can be easily determined, and a specific pattern exists in the printed matter. The challenge is to provide printed matter that is not easily recognized as being.

The invention according to claim 1 for achieving the above object is a printed matter having at least a base material, a patterned gloss adjusting layer, and a transparent metal gloss layer laminated so as to cover the patterned gloss adjusting layer. The surface roughness of the outermost surface on the transparent metal glossy layer side is uniform, and the surface average roughness Ra of the outermost surface on the transparent metal glossy layer side is 0.5 μm or more and 5 μm or less. It is within the range, the patterned gloss adjusting layer is colorless and transparent, and the outermost surface on the transparent metal gloss layer side in the region where the patterned gloss adjusting layer is laminated, and the patterned gloss adjusting. said permeable metallic luster layer side of the outermost surface in the region where the layer is not laminated state, and are differences 5μm or less of the surface roughness Ra of, upon viewing the printed material from the specular reflection direction with respect to the incident angle of light In addition, strong reflected light is observed in the region where the patterned gloss adjusting layer is laminated, and in the region where the patterned gloss adjusting layer is not laminated, the intensity is stronger than the reflected light in the region where the patterned gloss adjusting layer is laminated. When a small reflected light is observed and the printed matter is visually recognized from outside the normal reflection direction with respect to the incident angle of the light, even in the region where the patterned gloss adjusting layer is laminated, the region where the patterned gloss adjusting layer is not laminated. Also, the printed matter is characterized in that the difference in the intensity of the reflected light visually recognized by the observer is so small that it can be ignored.

The invention according to claim 2 is the printed matter according to claim 1, wherein a transparent metallic luster layer is provided on the patterned luster adjusting layer in a pattern pattern.

The invention according to claim 3 is the printed matter according to claim 1 or 2, wherein the surface roughness Ra of the outermost surface on the transparent metallic luster layer side is 0.5 μm or more and 5 μm or less. It was done.

The invention according to claim 4 is the printed matter according to claims 1 to 3, wherein the transparent metallic luster layer is formed of a metallic luster ink.

The invention according to claim 5 is the printed matter according to claims 1 to 4, wherein the thickness of the transparent metallic luster layer is 0.5 μm or more and 1.5 μm or less. is there.

The invention according to claim 6, wherein the printed material, that the printed matter according to claim 1 to 5, characterized in that an image layer between the substrate and the permeable metallic luster layer Is.

According to the printed matter according to the present invention, when the printed matter is confirmed from the specular reflection area by the reflection type optical system, the pattern of the patterned luster adjusting layer applied under the printed matter is visually recognized and the transparent metal is recognized. Since the glossy layer has transparency, it is possible to visually recognize a complex image pattern including an image pattern formed on the base material. On the other hand, when the printed matter is confirmed from outside the specular reflection direction, the pattern of the patterned gloss adjusting layer is not formed, so that a special optical effect is produced in which the pattern changes as the observation direction changes. Further, since the smoothness is substantially constant on the surface of the printed matter regardless of the location, a special pattern exists in the printed matter simply by observing the printed matter from the outside or touching it with a hand. It is not easily recognized, and therefore has a high anti-counterfeiting effect.

Further, the printed matter according to claim 5 has an image pattern that can be visually recognized when confirmed from the specular reflection direction by setting the transparency within an appropriate range by defining the thickness of the transparent metallic luster layer. It is possible to clearly confirm both the image pattern that is visually recognized when the image is confirmed from outside the specular reflection direction, and it exhibits higher design and anti-counterfeiting effect.

Further, in the printed matter according to claim 7, by providing an image on the base material, the image on the base material can be confirmed through the transparent metallic luster layer, so that the printed matter exhibits higher designability and anti-counterfeiting effect. ..

It is sectional drawing explaining an example of the structure of the printed matter of this invention. It is sectional drawing explaining the principle of the optical phenomenon which occurs in the printed matter of this invention. It is sectional drawing explaining the principle of the optical phenomenon which occurs in the conventional printed matter. It is a top view explaining an example of the structure of the printed matter of this invention.

Hereinafter, the structure of the printed matter according to the present invention, the optical effect achieved by the structure, and the principle thereof will be described with reference to the drawings as necessary.

An example of the printed matter of the present invention is shown in FIG.
The printed matter 10 shown in FIG. 1A has a base material 11, a patterned luster adjusting layer 12 formed on one surface of the base material 11, and a patterned luster adjusting layer 12 formed on the patterned luster adjusting layer 12. The region 21 is composed of the transparent metallic luster layer 13 formed so as to cover the gloss adjusting layer 12, that is, the region 21 in which the patterned luster adjusting layer is formed and the region 22 in which the patterned gloss adjusting layer is not formed. Have. The transmissive metallic luster layer 13 includes the roughness of the surface of the transmissive metallic luster layer 13 provided on the patterned luster adjusting layer 12 and the transmissive metallic luster layer 13 provided on a portion not on the patterned luster adjusting layer 12. By reducing the difference from the surface roughness, it becomes difficult to visually recognize the patterned luster adjusting layer as a hidden image, and it becomes difficult to recognize the existence of the patterned luster adjusting layer even when touched with a finger or the like. In particular, it is preferable to form the transparent metallic luster layer 13 by a printing method because it is less affected by the surface shape of the lower layer.

Further, as shown in FIG. 1B, the image layer 14 may be provided on the base material. The image may be a pattern or a tint block. Further, as shown in FIG. 1C, a transparent metallic luster layer 13 may be provided in a pattern on the patterned luster adjusting layer 12. Further, an anchor layer may be provided on the base material. The anchor layer makes it possible to smooth or roughen the surface roughness (shape) of the base material and control it.

In addition, in FIGS. 1A, 1B, and 1C, the surface of the transparent metallic luster layer 13 is described as if it is constantly smooth on the entire surface of the transparent metallic luster layer 13, but the transparent metallic luster layer 13 is described. The surface may be within a certain range without significantly changing the smoothness between the portion to which the patterned luster adjusting layer is applied and the portion to which the patterned luster adjustment layer is not applied. For example, as shown in FIG. 1 (d), the entire surface thereof is covered. It may be consistently uneven. In addition, another new layer may be provided between the layers as necessary, or surface treatment, printing, or the like may be performed. Further, a transparent protective layer and a transparent visibility adjusting layer may be provided on the outermost surface.

The optical phenomenon exhibited by the printed matter 10 of the present invention and the conventional printed matter and its principle will be described with reference to FIGS. 2 and 3. FIG. 2 is an explanatory diagram showing a case where the observer 40 observes the reflected light reflected from the light source 50 on the printed matter 10 in the printed matter 10 of the present invention. (The refraction of light at each interface is omitted.)
In FIG. 2, the incident light 30 emitted from the light source 50 to the printed matter 10 is partially transmitted and absorbed on the surface of the printed matter (in this example, the surface of the transparent metallic luster layer 13) and partially reflected. Ru. The reflected light on the surface is the normal reflected light 31a (light reflected at an angle substantially equal to the incident angle (angle a≈b)) reflected in the normal reflection direction with respect to the incident light 30, and the direction outside the normal reflection direction. It is divided into diffusely reflected light 32a, which is diffusely reflected.

Then, in the region 21 where the patterned gloss adjusting layer is provided, a part of the transmitted light is transmitted at the interface between the surface layer and the patterned gloss adjusting layer, and a part of the transmitted light is reflected. Further, the reflected light on the surface is divided into a normal reflected light 31b that is reflected in the normal reflection direction with respect to the incident light 30 and a diffusely reflected light 32b that is diffusely reflected in a direction outside the normal reflection direction. The light transmitted in the region 22 where the patterned gloss adjusting layer is not provided and the region 21 where the patterned gloss adjusting layer is provided is partially absorbed and partially reflected at the interface between the base material and the upper layer. Will be done. The reflected light is divided into a normal reflection light 31c that is reflected in the normal reflection direction with respect to the incident light 30, and a diffuse reflection light 32c that is diffusely reflected in a direction outside the normal reflection direction. Transmitted light is also generated depending on the thickness and material of the base material.

In FIG. 2, when the observer 40 is in a positional relationship in which the specularly reflected light can be observed with respect to the light source 50, in the region 21, the specularly reflected light 31a from the surface and the specular reflection from the interface between the patterned gloss adjusting layer and the upper layer are reflected. Light 31b and specularly reflected light 31c from the interface between the base material and the upper layer are observed. Further, in the region 22, the specularly reflected light 31a and the specularly reflected light 31c are observed (FIGS. 2a and 2b). Here, when the base material is non-glossy and the patterned gloss adjustment layer is glossier than the base material, the specularly reflected light 31c is light with weak gloss, so the observer determines whether or not the specularly reflected light 31b is present. Based on this, since the region 21 is visually recognized as having a higher degree of gloss than the region 22, the pattern of the patterned gloss adjusting layer can be recognized as characters and images. When the base material is glossy such as glossy paper, the pattern of the patterned gloss adjusting layer can be recognized as characters and images by lowering the glossiness of the patterned gloss adjusting layer.

In FIG. 2, when the observer 40 is in a position outside the positional relationship in which the positively reflected light can be observed with respect to the light source 50, in the region 21, the diffuse reflected light 32a from the surface, the patterned gloss adjusting layer, and the upper layer are formed. The diffuse reflected light 32b from the interface and the diffuse reflected light 32c from the interface between the base material and the upper layer are observed. Further, in the region 22, diffuse reflected light 32a and diffuse reflected light 32c are observed (FIGS. 2c and d). Here, since the diffusely reflected light is weaker than the specularly reflected light, the diffusely reflected light 32a from the surface is dominant among the diffusely reflected lights 32a, 32b, and 32c as the light visually recognized by the observer 40. Therefore, since there is little difference in visibility between the area 21 and the area 22, it is difficult for the observer 40 to recognize the pattern of the patterned gloss adjusting layer, and the color of the surface layer is uniformly visible.

A pattern visually recognized when the printed matter according to the present invention is irradiated with light and observed from both the specular reflection direction and the outside of the specular reflection direction will be described with reference to FIG. Here, the printed matter shown in FIG. 4 has an image layer 14 composed of a star-shaped pattern between the base material 11 and the pattern optical adjustment layer 12.

When the printed matter of the present invention is visually recognized from the direction of normal reflection with respect to the incident angle of light, as shown in FIG. 4A, in the region 21 in which the transparent metal gloss layer 13 is provided on the pattern gloss adjustment layer 12. Is strongly reflected light, but in the region 22 where the patterned gloss adjusting layer 12 is not provided, the reflected light having a lower intensity than the reflected light in the region 21 is observed, so that it is visually recognized by the observer. There is a difference in the intensity of the reflected light, and as a result, the observer can visually recognize the pattern as shown in FIG. 4 (a).

On the other hand, when the printed matter of the present invention is visually recognized from outside the specular reflection direction with respect to the incident angle of light, a transparent metallic luster layer 13 is provided on the patterned luster adjusting layer 12 as shown in FIG. 4 (b). Since the intensity of the reflected light reaching the observer's eyes is equally small in both the region 21 and the region 22 in which the patterned luster adjusting layer 12 is not provided, the difference in the intensity of the reflected light visually recognized by the observer is ignored. It is as small as possible, and the observer can visually recognize the pattern as shown in FIG. 4 (b).

The base material 11 used in the printed matter 10 of the present invention may be transparent or opaque, and is not particularly limited. For example, polyethylene terephthalate (PET), triacetyl cellulose, polycarbonate, polyester, poly. A film such as acetate, polystyrene, or epoxy resin, or a base material used for general coins and cards such as high-quality paper, coated paper, and synthetic paper can be used. The thickness of the base material 11 is not particularly limited, but is generally set in the range of 0.05 μm or more and 50 μm or less.

The surface smoothness of the base material 11 is not limited, but it is preferable that the surface of the base material 11 has a certain degree of printability and smoothness from the viewpoint of accurately applying the patterned gloss adjusting layer 12. An anchor layer may be provided in order to improve the smoothness of the surface of the base material 11, and the patterned gloss adjusting layer 12 may be applied on the anchor layer.

The anchor layer can be appropriately provided depending on the smoothness of the surface of the base material 11. For example, when the ink material forms irregularities on the base material 11 and the surface becomes rough as a result of forming an image on the base material by a printing method, it is desirable to install an anchor layer. The material of the anchor layer is not particularly limited as long as it has required performance such as transparency, if necessary, and a general material can be used.

Further, the image 14 may be formed on the base material 11. The material and forming method of the image are not particularly limited, but if it is desired to reduce the cost of forming the image, colored ink or the like can be printed by letterpress printing, flexographic printing, screen printing, flat plate printing, gravure printing, offset printing, etc. It is preferably formed by a printing method such as printing. The pattern of the image to be formed is not particularly limited, and may be, for example, characters, patterns, or the like.

The patterned gloss adjusting layer 12 has different light reflection characteristics (gloss) on the surface of the base material. For example, if the base material is non-glossy plain paper, a resin layer such as a glossy varnish can be used. If the base material is glossy paper, a resin layer such as a surface matte varnish can be used. Further, the patterned gloss adjusting layer is preferably colorless and transparent. This is because the pattern of the patterned gloss adjusting layer is easily recognized if it is colored. Further, when the image layer 14 is formed on the base material, the patterned gloss adjusting layer is preferably colorless and transparent from the viewpoint of visual recognition of the image.

Such a resin layer can be formed by using an ink containing at least a resin and a solvent. Specific examples thereof include ultraviolet curable inks and varnishes. As an example of the resin used for the ultraviolet curable ink, for example, as the prepolymer, epoxy acrylate, urethane acrylate, polyester acrylate or the like can be used. As the monomer, methyl (meth) acrylate, ethylene glycol, di (meth) acrylate, totimerol propane, tri (meth) acrylate and the like can be used. As the sensitizer, benzophenol, 4,4-bisdiethylaminobenzophenol, and thioxanthone can be used. Further, as an example of the resin used for varnish, rosin-knitted phenol resin, alkyd resin, petroleum resin and the like can be used, and as drying oil and semi-drying oil, linseed oil, tung oil, soybean oil, safary oil, castor oil and the like are used. it can. The solvent is not particularly limited, but for example, cyclohexanone, butyl cellosolve acetate, 1-methoxy-2-propyl acetate, propylene glycol monopropyl ether, toluene, anisole, methyl ethyl ketone, ethyl acetate, butyl acetate, isopropyl alcohol, butanol, isobutyl ketone, d. -Limonene, petroleum solvents, or mixtures containing two or more of them can be used.

The thickness of the patterned gloss adjusting layer is preferably 0.1 or more and 5 μm or less. More preferably, it is about 0.5 to 1.5 μm. Further, if it is desired to have a structure in which the image drawn on the base material 11 can be observed from the side of the transparent metallic luster layer 13, the patterned luster adjusting layer 12 may be formed using only a transparent or translucent material. ..

Further, in the present invention, the patterned gloss adjusting layer 12 may contain additives other than the above, if necessary. For example, when the base material is glossy paper or the like, the degree of gloss can be adjusted with a matte varnish, and specifically, the degree of matte can be controlled by adding an additive such as particles to the resin. .. Further, when a fluorescent additive is contained in the patterned gloss adjusting layer 12, in addition to the change in the visual image in observation inside and outside the specular reflection direction, the fluorescence pattern generated by the excitation of fluorescence by ultraviolet rays or the like is also used for authenticity. It becomes possible to make a judgment.

The patterned gloss adjusting layer 12 may be formed by any method, but when it is desired to reduce the cost for forming the layer, it is preferable to form the patterned gloss adjusting layer 12 by a printing method, for example, wet offset printing, dry offset printing, and letterpress. It can be formed by printing processes such as printing, waterless flat plate printing, gravure printing, flexo printing, screen printing, and concave printing.

The transmissive metallic luster layer 13 has metallic luster and can transmit specularly reflected light from the patterned luster adjusting layer, in addition to the portion provided on the patterned luster adjusting layer and the patterned luster adjusting layer. The provided portion is not particularly limited as long as the difference in surface roughness is small and the patterned luster adjusting layer can be easily recognized. As such, for example, it can be formed by a printing method using a glossy ink. Since it is formed by a printing method, unlike a vapor phase method such as a vapor deposition method or a sputtering method, it is difficult to follow the surface shape of the lower layer, so that the surface roughness can be made constant.

As the glossy ink used for the transmissive metallic luster layer, specifically, an ink containing a metal such as silver paste, aluminum, copper, silver, tin, zinc, brass, or iron phosphide can be used. As shown in each example of FIG. 1, the transparent metallic luster layer 3 may be uniformly provided on the patterned luster adjusting layer 12 or may be provided in a pattern, but the manufacturing is facilitated and the manufacturing cost is increased. From the viewpoint of reduction, it is preferable to provide them uniformly.

In the printed matter of the present invention, since the reflected light from the patterned gloss adjusting layer is used, it is necessary that the incident light 30 is not completely reflected and has a certain transparency. The thickness of the transparent metallic luster layer 13 is not limited as long as the transparency can be ensured and the surface roughness becomes uniform, but it is generally desirable that the thickness is 0.1 μm or more and 5 μm or less. , More preferably 0.5 μm or more and 1.5 μm or less. When the thickness is 1.5 μm or more, the transmittance is lowered, so that, for example, when an image or the like is formed on the base material 11, it may be difficult to clearly recognize the image. If the thickness is less than 0.5 μm, it is easily affected by the surface shape of the lower layer.

The transparent metallic luster layer 13 may be formed by any method like the patterned luster adjusting layer 12, and can be formed by, for example, each printing method exemplified above. In addition, if necessary, a transparent protective layer or a transparent colored layer may be overlaid on the transparent metallic luster layer 13 as long as the visual effect and the like are not lost.

The principle in the present invention is based on the premise that the smoothness of the transparent metallic luster layer 13 on the surface of the portion to which the patterned luster adjusting layer is applied and the portion to which the patterned luster adjusting layer is not applied are within a certain range as described above. Therefore, the smoothness of the surface is not a direct factor in the principle that the pattern is visible. Therefore, in the printed matter according to the present invention, the smoothness of the transparent metallic luster layer 13 on the surface thereof is significantly different between the portion where the patterned luster adjusting layer is applied and the portion where the patterned luster adjusting layer is not applied, as in the prior art. No need. Further, for the reason described above, the smoothness of the surface on the transparent metallic luster layer 13 side, which is the outermost surface layer, is the same in the region 21 to which the patterned luster adjusting layer 12 is applied and the region 22 to which the patterned luster adjusting layer 12 is not applied. It is necessary to be. Specifically, the difference between the surface average roughness Ra of the region 21 and the region 22 is preferably within the range of 5 μm or less, and further preferably within the range of 2 μm or less. Within this range, when the observer 40 is in a position outside the positional relationship in which the specularly reflected light can be observed with respect to the light source 50, it is possible to make it difficult to visually recognize the patterns of the region 21 and the region 22, and the finger. Even if you touch it with a finger, you can make it difficult to see the presence or absence of the pattern. Ra used here is a surface average roughness measured based on JIS B0601.

Further, the surface average roughness Ra of the region 21 and the region 22 may be such that the difference in Ra within the range of about 0.1 to 5 cm near the boundary is within the above-mentioned range. It is preferable that there is no step between the outermost layers of the region 21 and the region 22. Specifically, the difference between the thickness of the region 21 from the base material to the outermost layer and the thickness of the region 22 from the base material to the outermost layer is preferably 2 μm or less, and more preferably 1 μm or less. Within this range, it is possible to prevent the existence of the pattern from being easily recognized when the pattern is traced with a finger. The film thicknesses in the region 21 and the region 22 may be such that the difference in average film thickness within the range of about 0.1 to 5 cm near the boundary is within the above range.

The surface average roughness Ra on the transparent metallic luster layer 13 side, which is the outermost surface layer, is preferably in the range of 0.5 μm or more and 5 μm or less, and further in the range of 1.5 μm or more and 3.5 μm or less. Is preferable. Within this range, when the observer 40 is at a position outside the positional relationship in which the specularly reflected light can be observed with respect to the light source 50, an appropriate diffuse reflected light can be uniformly visually recognized.

<Example 1>
The printed matter according to the present invention was formed with the following constitution. A paper base material was used as the base material, and an image layer composed of a plurality of star mark-shaped patterns was formed on the base material using black ink. Subsequently, a patterned gloss adjusting layer made of an ultraviolet curable transparent medium ink was formed on the base material in a pattern made of "convex" characters. The gloss adjustment layer on the pattern was formed by offset printing with an average film thickness of 1 μm. Further, on the formed patterned luster adjusting layer, a transparent metallic luster ink (silver ink) is used, and the same offset printing is performed so as to cover the patterned luster adjusting layer as shown in FIG. 1 (a). The metallic luster layer 3 was formed with an average thickness of about 1.5 μm.

With respect to the printed matter produced by the method and configuration described in the previous section, the surface average roughness Ra of the surface of the printed matter on the transparent metallic luster layer side at the portion where the patterned luster adjustment layer was provided and the portion where the patterned luster adjustment layer was not provided was measured. .. A stylus type smoothness measuring device SP-91D (manufactured by Kosaka Laboratory Co., Ltd.) was used for measuring the surface smoothness. Further, the pattern visually recognized when the printed matter was irradiated with light from diagonally above and observed from the specular reflection direction and the pattern visually recognized when observed from a direction other than the specular reflection direction were visually confirmed.

<Example 2>
The pattern was formed in the same manner as the printed matter described in Example 1 except that the gloss adjusting layer was formed with an average film thickness of about 0.5 μm and the transparent metallic luster layer was formed with an average film thickness of about 0.5 μm. Similar to Example 1, the formed printed matter has the surface average roughness Ra of the surface on the transparent metallic luster layer side, and the specular reflection angle direction and specular reflection when light is irradiated from diagonally above the printed matter. The patterns observed from outside the direction were visually confirmed.

<Example 3>
The pattern was formed in the same manner as the printed matter described in Example 1 except that the gloss adjusting layer was formed with an average film thickness of about 1.5 μm and the transparent metallic luster layer was formed with an average film thickness of about 2.5 μm. Similar to Example 1, the formed printed matter has the surface average roughness Ra of the surface on the transparent metallic luster layer side, and the specular reflection angle direction and specular reflection when light is irradiated from diagonally above the printed matter. The patterns observed from outside the direction were visually confirmed.

<Comparative example 1>
A paper base material was used as the base material, and an image layer composed of a plurality of star mark-shaped patterns was formed on the base material using black ink. Subsequently, an ultraviolet curable ink (ultraviolet curable transparent medium ink) layer was formed on the base material in a pattern composed of "convex" characters by offset printing with an average film thickness of 1.5 μm. Further, on the formed ultraviolet curable ink layer, a metal vapor deposition layer was formed with an average film thickness of about 1.5 μm using aluminum so as to cover the ultraviolet curable ink layer as shown in FIG. 1 (a).

In Table 1, the items related to Ra show the following states. That is, "on the patterned luster adjusting layer" indicates the surface average roughness measured for the transparent metallic luster layer directly above the portion where the patterned luster adjusting layer is applied, and "outside the patterned luster adjusting layer" means. , The surface average roughness measured just above the part where the patterned luster preparation layer is not applied is shown.

In addition, in Table 1, the items related to visibility show the following states. That is, the "star mark-like pattern" indicates the visibility of the pattern of the star mark-like pattern formed by the black ink, and the "convex character" is a pattern composed of the convex character formed by the pattern gloss adjustment layer. The visibility when observing from the specular reflection direction and when observing from outside the specular reflection direction is shown. ◯ indicates a state in which each pattern was clearly visible, and × indicates a state in which each pattern was not clearly visible.

As shown in Table 1, in all the examples and comparative examples, the "convex" characters formed by the patterned gloss adjusting layer could be visually recognized in the observation from the specular reflection direction. In particular, in Examples 1 and 2, the star mark-shaped pattern formed on the background of the transparent metallic luster layer and the patterned luster adjusting layer could be visually recognized well. On the other hand, in Comparative Example 1, the character "convex" was visually recognized even when observing from outside the specular reflection direction, and the existence of the pattern was easily recognized. It seems that this is due to the difference in surface roughness.

10 …… Printed matter 11 …… Base material 12 …… Patterned luster adjustment layer 13 …… Transparent metallic luster layer 14 …… Image layer 15 …… Printed matter 16 …… Metal vapor deposition layer 17 …… Smooth varnish layer 21 …… Area 22 where the patterned luster adjustment layer is provided ... Area 30 where the pattern gloss adjustment layer is not provided 30 ... Incident light 31 ... Specular reflected light 32 ... Diffuse reflected light 40 ... Observer 50 ... light source

Claims (4)

A printed matter having at least a base material, a patterned luster adjusting layer, and a transparent metallic luster layer laminated so as to cover the patterned luster adjusting layer.
The surface roughness of the outermost surface on the transparent metallic luster layer side is uniform, and the surface average roughness Ra of the outermost surface on the transparent metallic luster layer side is within the range of 0.5 μm or more and 5 μm or less. ,
The patterned gloss adjusting layer is colorless and transparent.
The outermost surface on the transparent metallic luster layer side in the region where the patterned luster adjusting layer is laminated, and the outermost surface on the transparent metallic luster layer side in the region where the patterned luster adjusting layer is not laminated. The difference in surface roughness Ra is 5 μm or less,
When the printed matter is visually recognized from the direction of normal reflection with respect to the incident angle of light, strong reflected light is observed in the region where the patterned gloss adjusting layer is laminated, and the pattern is observed in the region where the patterned gloss adjusting layer is not laminated. Reflected light with a lower intensity than the reflected light in the region where the gloss adjustment layer is laminated is observed.
When the printed matter is visually recognized from outside the specular reflection direction with respect to the incident angle of light, the observer can visually recognize the printed matter both in the region where the patterned gloss adjusting layer is laminated and in the region where the patterned gloss adjusting layer is not laminated. The difference in the intensity of the reflected light is negligible,
A printed matter characterized by being characterized by that. The printed matter according to claim 1, wherein a transparent metallic luster layer is provided on the patterned luster adjusting layer in a pattern pattern. The printed matter according to claim 1 or 2, wherein the transparent metallic luster layer is formed of a metallic luster ink. The printed matter according to claim 1 to 3, wherein the printed matter has an image layer between the base material and the transparent metallic luster layer.

Images