JP2021137981A - Reflector comprising latent image - Google Patents

Abstract

To provide a reflector in which a plurality of kinds of latent images having an overlapping on at least a part on a same reflection plane, can be embedded, and which has a reflection plane in which, by changing a reflection angle of the reflection plane, it is possible to make each latent images out of the plurality of kinds of latent images become apparent according to a reflection angle, for recognizing the latent images.SOLUTION: A reflector comprises a reflection plane comprising: a background region on which, a first region defined by a first parallel line, and a second region which is defined by a second parallel line formed at an angle different from that of the first parallel line, overlap each other; a third parallel line which is formed at an angle for crossing both of the first and second parallel lines, and makes a first latent image formed on the background region of the reflection plane become apparent, in a state in which a cross angle with the first parallel line is set to be greater than a cross angle with the second parallel line; and a fourth parallel line which is formed at an angle for crossing all of the first to third parallel lines, and makes a second latent image formed on the background region of the reflection plane, in a state in which a cross angle with the second parallel line is set to be greater than a cross angle with the first parallel line.SELECTED DRAWING: Figure 1

Description

The present invention relates to a reflector having a latent image, and more specifically, a reflector capable of revealing and recognizing a latent image embedded in the reflecting surface by changing the reflection angle of the reflecting surface of the reflecting body.

Latent images may be embedded in the reflective surfaces of gift certificates, admissions, stock certificates, etc. for the purpose of anti-counterfeiting, prevention of unauthorized copying, decoration, etc. The latent image embedded in the reflecting surface can be made apparent by changing the reflection angle of the reflecting surface and can be recognized by the observer. For example, Japanese Patent Application Laid-Open No. 2019-84719 discloses an excipient card which is an example of this type of reflector.

JP-A-2019-84719

There is only one type of latent image embedded in the reflective surface of the conventional shaping card. Therefore, the observer can recognize only one type of latent image regardless of the reflection angle of the shaping card.
An object of the present invention is to embed a plurality of types of latent images having an overlap at least in a part thereof, and to make each of the plurality of types of latent images manifest and be recognized according to the reflection angle by changing the reflection angle. It is an object of the present invention to provide a reflector having a reflective surface capable of forming a reflector.

In order to solve the above problems, the reflector according to one aspect of the present invention has a first region defined by the first universal line and a second region formed at an angle different from that of the first universal line. The background area where the second region defined by the universal line overlaps, the angle at which both the first universal line and the second universal line intersect, and between the first universal line. With the intersection angle set to be larger than the intersection angle with the second 10,000 lines, the third 10,000 lines that make the first latent image formed in the background region of the reflection surface manifest, and the first one. The angle of intersection with all of the first to third ten thousand lines and the angle of intersection with the second ten thousand lines is set to be larger than the angle of intersection with the first ten thousand lines. It is characterized by having a reflecting surface including at least a fourth ten thousand lines for manifesting a second latent image formed in a background region of the reflecting surface.
The reflector may be a printed matter.
According to the reflector of this aspect, a plurality of types of latent images having at least a partial overlap can be embedded in the reflecting surface, and by changing the reflection angle of the reflecting surface, a plurality of types of latent images can be embedded according to the reflection angle. Each of the latent images can be made apparent and recognized by the observer.

In the reflector of the above aspect, the first to fourth lines may include concave lines and convex lines arranged alternately next to each other, respectively.
When using printing technology, it is particularly useful to adopt such a configuration.

Further, in the reflector of the above aspect, the surface of the convex line may be covered with a varnish for printing, and the surface of the concave line may be formed of a material that repels the varnish. The printing varnish is preferably flexon varnish.

Further, in the reflector of the above aspect, the dimension between the surface of the convex line and the surface of the concave line is preferably 1 to 8 μm or less.

Further, in the reflector of the above aspect, it is preferable that each width of the first convex line is 0.2 to 0.35 μm.
In the reflector of the above aspect, the separation distance of the convex lines is preferably 0.05 to 0.1 μm.

In the reflector of the above aspect, the angle of intersection between the first and third lines and the angle of intersection between the second and fourth lines are determined. Each is preferably about 90 degrees, and the crossing angle between the first 10,000 lines and the second 10,000 lines is preferably about 45 degrees.
By setting such an angle, the latent image can be made more clear by utilizing the difference in brightness.

According to the present invention, it is possible to embed a plurality of types of latent images having overlap at least in part, and by changing the reflection angle, each of the plurality of types of latent images is manifested and recognized according to the reflection angle. A reflector having a reflective surface capable of forming a reflector is provided.

An example in which a reflector according to an embodiment of the present invention is used for a card is shown. An example in which a reflector according to an embodiment of the present invention is used for a banknote is shown. It is conceptually shown in a state where the reflection angle of the reflection surface of the reflector according to one embodiment of the present invention is changed. It is conceptually shown in a state where the reflection angle of the reflection surface of the reflector according to one embodiment of the present invention is changed. It is conceptually shown in a state where the reflection angle of the reflection surface of the reflector according to one embodiment of the present invention is changed. It is a partially enlarged view in the part "IV" of FIG. It is a partially enlarged view in the part "V" of FIG. It is the schematic of the cross section of the printed matter. It is a figure which plotted the evaluation result of an Example and a comparative example.

Hereinafter, exemplary embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative positions of the components, etc. described in the following embodiments are arbitrary and can be changed according to the configuration of the device to which the present invention is applied or various conditions. Further, unless otherwise specified, the scope of the present invention is not limited to the embodiments specifically described below.

1 and 2 exemplify the usage mode of the reflector according to the embodiment of the present invention. FIG. 1 shows a mode in which a reflector is used for a card, and FIG. 2 shows a mode in which a reflector is used for a banknote. (A) and (b) of FIG. 1 show the same card 3, but show a state in which the reflection angle of the reflection surface 1a of the reflector 1 provided on the card 3 is changed. As is clear from comparing (a) and (b) of FIG. 1, the scenery seen by the observer changes by changing the reflection angle. More specifically, at the reflection angle in FIG. 1 (a), for example, the letter “S” can be observed on the reflective surface 1a of the reflector 1, whereas the reflection angle in FIG. 1 (b) is observed. Then, for example, the character "U" can be observed on the reflecting surface 1a of the reflector 1. Although not particularly shown, in the case of the banknote 4 shown in FIG. 2, similarly, by changing the reflection angle, the character “100” is displayed on the reflecting surface 1a of the reflector 1, here in the pentagonal region, for example. , "D" can be changed to a letter. Of course, the usage modes shown in FIGS. 1 and 2 are not intended to limit the reflector 1 of the present invention to cards and banknotes, and the reflector 1 of the present invention can be used in various ways other than cards and the like. Can be used for goods. Further, the reflector 1 itself can be an article itself.

3 to 5 show the reflecting surface 1a of the reflector 1 shown in FIG. 1 in more detail and conceptually, respectively. All of these figures show the same reflecting surface 1a of the same reflector 1, but similarly to FIGS. 1A and 1B, each drawing has a modified reflection angle of the reflecting surface 1a. Sometimes it is a separate indication of what the observer sees. More specifically, the latent image is manifested by changing the reflection angle of the reflective surface 1a of a plurality of types, here two types of reflecting surfaces 1a in which the latent image is embedded, which have at least a partial overlap. The state of being made is shown as a separate drawing. It is sufficient that the reflecting surface 1a can reflect light, but it is preferable that the reflecting surface 1a has gloss.

As an example of the reflector, here, a printed matter 1 manufactured by using a printing technique will be illustrated. Of course, there is no intention of limiting the present invention to the printed matter 1. As long as the principle of the present invention can be applied, any reflector other than the printed matter 1 may be used, and for example, a reflector manufactured by using conventional embossing may be used. Further, it may be used by being bonded to the surface of the product.

For example, when the observer observes the reflecting surface 1a from the front without tilting the printed matter 1, both the first latent image A and the second latent image B become apparent as shown in FIG. It is assumed that an image in which both the first latent image A and the second latent image B are mixed is observed on the reflecting surface 1a. In this case, the first latent image A and the second latent image B, especially in the overlapping portion "C" thereof, the first latent image A and the second latent image B can be clearly recognized. Can not.

On the other hand, when the printed matter 1 is tilted to the first angle "Θ1" and the reflecting surface 1a is observed, the observer sees the first latent image A as shown in FIGS. 1A and 4A. Only the character "S", for example, can be manifested and recognized in a state of being distinguished from the character "U", which is the second latent image B. At this time, the observer cannot substantially recognize the character "U", which is the second latent image B.

Further, when the printed matter 1 is tilted to the second angle "Θ2" and the reflecting surface 1a is observed, the observer sees the second latent image B as shown in FIGS. 1B and 5B. Only a certain letter "U" can be manifested and recognized in a state of being distinguished from the letter "S" which is the first latent image A. At this time, the observer cannot substantially recognize the character "S" which is the first latent image A.

In this way, when the observer changes the reflection angle of the reflection surface 1a of the printed matter 1 and observes the first latent image A and the second latent image B, if they are at least a part thereof. Even if there is an overlap, it can be manifested and recognized in a state in which they are clearly distinguished from each other. Although the letters "S" and "U" are shown as examples of the latent image, of course, what kind of latent image should be used as long as it is merely an example and the principle of the present invention can be used. You may.

Next, the structure of the reflecting surface 1a will be described in more detail with reference to FIGS. 6 to 8. 6 is a partially enlarged view of the portion “IV” of FIG. 4, FIG. 7 is a partially enlarged view of the portion “V” of FIG. 5, and FIG. 8 is a schematic cross section of the printed matter 1. It is shown.

The reflecting surface 1a is provided with a plurality of sets, here four sets (10, 20, 30, 40) of a plurality of parallel lines forming individual lines. In order to facilitate the adjustment of the reflected light, it is preferable that the plurality of parallel lines are arranged with a uniform width and a uniform spacing. In the present embodiment, all of these ten thousand lines 10 to 40 are formed by using a known printing technique. By using the printing technique, it is possible to manufacture a reflector at a higher speed and at a lower cost than embossing or the like, and it is possible to form a delicate many lines from the reflective surface. The plurality of parallel lines constituting the ten thousand lines are concave lines arranged alternately adjacent to each other (concave lines 10-1 to 40-1 in FIGS. 6 to 8 described later) having an uneven cross-sectional view. Convex lines (convex lines 10-2 to 40-2 in FIGS. 6 to 8 described later) are included. The concave line 20-1 in FIG. 6 and the concave line 10-1 in FIG. 7 are shown by broken lines for convenience, and are actually in a solid line state like other parallel lines. It can be considered that it is formed. Further, in FIGS. 6 and 7, the concave line is shown in a state of being thicker than the convex line, but this is for convenience and will be described later with reference to FIG. , The width of these concave lines and the width of the convex lines may be substantially the same. Further, in the present embodiment, it is sufficient that each set of the ten thousand lines 10, 20, 30, and 40 includes a concave line and a convex line, respectively. For example, as shown in the present embodiment, when the printing technique is used, the printing ink generally forms a convex line, but when this is transferred, the convex line is formed. This is because a concave line is formed, and conversely, the concave line forms a convex line. Therefore, in the final product form, the printing ink does not necessarily form a convex line on the reflective surface.

The first ten thousand lines 10 are mainly for manifesting the first latent image A, and define a first region "α" on the reflection surface 1a. On the other hand, the second many lines 20 formed at an angle different from the first many lines 10 are mainly for manifesting the second latent image B, and the second one on the reflecting surface 1a. The region "β" is defined.

The portion "γ" where the first region "α" and the second region "β" overlap functions as a background region in which both the first latent image A and the second latent image B can be embedded. .. The background region "γ" need only be formed in the region where both the first latent image A and the second latent image B need to be embedded. Since the embodiments shown in FIGS. 3 to 5 are based on the premise that the first latent image and the second latent image can be embedded in any of the regions, the first region “α” and the first latent image and the second latent image can be embedded. Both of the second region "β" are provided over the entire reflective surface 1a, and as a result, the first region "α", the second region "β", and the background region "γ" are formed. , All occupy the same area. However, it is not always necessary to provide the second region "β" in the region in which only the first latent image A is embedded, and similarly, the region in which only the second latent image B is embedded does not necessarily have the first region. It is not necessary to provide "α". Therefore, the first region "α" or the second region "β" and the background region "γ" do not always have to occupy the same region as shown in FIGS. 3 to 5.

The first 10,000 lines 10 and the second many lines 20 are provided at different angles in the background region “γ”. As a result, the first Mansen 10 and the second Mansen 20 intersect each other. The intersection angle “θ1” between the first ten thousand lines 10 and the second ten thousand lines 20 is not limited, but is preferably set to about 45 degrees as in the illustrated embodiment. By setting such an angle, the design of the reflector 1 can be facilitated. The term "intersection angle" in the present specification means an acute angle at which they intersect, in other words, the smaller of the two angles formed by the two lines.

In order to embed a plurality of types of latent images, a plurality of ten thousand lines, here, the third ten thousand lines 30 shown in FIG. 6 and the fourth ten thousand lines 40 shown in FIG. 7 are provided in the background region “γ”. ing. It suffices to have at least two latent images embedded in the background region “γ” and a number of lines corresponding to each latent image, but two or more may be provided.

The first latent image A is embedded by the third universal line 30, which is shown in detail in FIG. The third Mansen 30 is provided at an angle that intersects both the first Mansen 10 and the second Mansen 20. Further, the third Mansen 30 is provided in a state where the crossing angle “θ2” with the first Mansen 10 is set to be larger than the crossing angle “θ3” with the second Mansen 20. ing. In order to show the angle relationship with the third Mansen 30 and the fourth Mansen 40, for convenience, FIG. 6 also includes a convex line 40-1 of the fourth Mansen which is not substantially manifested. Shown.

The second latent image B is embedded by the fourth perimeter 40, which is shown in detail in FIG. The fourth ten thousand lines 40 are provided at an angle intersecting all of the first to third ten thousand lines 10 to 30. Further, the fourth Mansen 40 is provided in a state where the crossing angle “θ4” with the second Mansen 20 is set to be larger than the crossing angle “θ5” with the second Mansen 20. ing. For convenience, FIG. 7 also includes a convex line 30-1 of the third universal line, which is not substantially manifested, in order to show the angle relationship with the fourth universal wire 40 and the third universal wire 30. Shown.

FIG. 8 schematically shows a cross section of the printed matter 1, in particular, a cross section in the direction of intersection with a plurality of parallel lines constituting each of the ten thousand lines. It may be understood that this figure is a figure common to all of the lines 10 to 40. As is clear from this figure, the printed matter 1 mainly includes the base material 5 and two types of layers 51 and 52 arranged on the surface of the base material 5 in the cross-sectional direction thereof.

The base material 5 is sufficient as long as it is a printable medium, and the material thereof is not particularly limited. Various materials such as paper, plastic, thin metal leaf, and film can also be used.

The layer 51 corresponds to the concave lines 10-1, 20-1, 30-1, 40-1 (see also FIGS. 6 and 7) among the plurality of parallel lines constituting each of the 10,000 lines. On the other hand, the layer 52 has, among the plurality of parallel lines constituting each of the ten thousand lines, particularly the convex lines 10-2, 20-2, 30-2, 40-2 (see also FIGS. 6, 7 and the like). ) Corresponds to. The reflective surface 1a includes both the surface 51a of the concave lines 10-1 to 40-1 constituting the layer 51 and the surface 52a of the convex lines 10-2 to 40-2 forming the layer 52.

The layer 51 can be formed by the underprinting ink. Therefore, the surface 51a of the layer 51 is covered with the underprinting ink.

On the other hand, the layer 52 can be formed by the topcoat ink. The topcoat ink is applied to both the base material 5 and the layer 51 of the underprinting ink previously applied to the base material 5. In this way, the topcoat ink is applied to both the base material 5 and the underprint ink layer 51, but since it is repelled by the underprint ink, it is above the underprint ink layer 51 in the final product. In addition, the layer 52 is not formed by the ink for top coating. As is clear, in the final product, the surface 52a of the layer 52, in other words, the surface 52a of the convex lines 10-2 to 40-2 constituting the layer 52, is formed by using the topcoat ink. The surface 51a of the concave lines 10-1 to 40-1 constituting the layer 51 can be formed by using the underprinting ink.

As the topcoat ink forming the layer 52, for example, a printing varnish such as flexonis can be used. By using flexonis, the height of the layer 52, more specifically, between the surface 52a of the convex lines 10-2 to 40-2 and the surface 51a of the concave lines 10-1 to 40-1. It becomes easy to maintain the dimension "m", and therefore, a feeling of depth of ten thousand lines 10 to 40 on the reflecting surface 1a can be easily obtained. The dimension "m" is preferably 1 to 8 μm, more preferably 1 to 8 μm, in consideration of the line width (“line width n” in FIG. 8), the separation distance (“separation distance k” in FIG. 8), and the luminance difference, which will be described later. It is 2 to 7 μm. By using flexonis, such dimensions can be easily achieved. In addition, since flexonis has excellent glossiness, the reflectance of the surface 52a of the convex lines 10-2 to 40-2 is set high. can do.

As the underprinting ink for forming the layer 51, for example, a known material in which a polymer, a monomer, and a photopolymerization initiator are mixed can be used. Since it is necessary to repel the topcoat ink, the underprint ink preferably contains a liquid repellent. By containing the liquid repellent, even when the topcoat ink is applied to both the base material 5 and the layer 51, the varnish of the topcoat ink can be easily repelled in the layer 51 to expose the layer 51. Can be done.

An example of a method for manufacturing the printed matter 1 will be described mainly with reference to FIG. First, on the surface of the sheet-shaped base material 5, for example, an ultraviolet curable type underprinting ink containing a liquid repellent is pattern-printed and cured by ultraviolet rays. This pattern printing is preferably performed by an offset printing method or a flexographic printing method, and the offset printing method is more preferable. The pattern printing is performed in a perennial pattern, and, for example, an ultraviolet curable topcoat ink is further applied on the layer of the underprint ink formed by the perimeter. The topcoat ink is applied not only on the base material 5 but also on the layer of the underprint ink. However, as described above, since the underprint ink contains a liquid repellent, it is used for underprinting. On the layer of ink, the topcoat ink is repelled, and as a result, a layer of topcoat ink formed of many lines is formed between the layers of the underprint ink formed of many lines. In other words, as shown in FIGS. 6 and 7, the concave portions 10-1 to 40-1 made of the underprint ink and the concave portions 10-1 to 40-1 are arranged adjacent to each other. , The convex portions 10-2 to 40-2 made of the topcoat ink are formed in a universal line shape. After making such a state, the topcoat ink is cured by ultraviolet rays. Although optional, it is preferable to further apply, for example, an ultraviolet curable coating agent to both the topcoat ink layer and the underprint ink layer to form a surface layer (not shown). In this way, the uneven portions may be formed directly with ink, but as disclosed in Japanese Patent Application Laid-Open No. 2019-84719 and the like, those portions can also be formed by using transfer.

Next, the operating principle of the reflecting surface 1a will be described.
Since the first to fourth ten thousand lines 10 to 40 are each formed in a concavo-convex shape, the light incident on the reflecting surface 1a is a concave line 10-1 to 40-1 of each ten thousand lines 10 to 40. Then, a part of the light is absorbed and reflected from the reflecting surface 1a in a state where the brightness is reduced. Since the first to fourth ten thousand lines 10 to 40 are provided at different crossing angles, the amount of decrease in the brightness of the incident light reduced by the ten thousand lines formed at a certain angle and the other angles are formed. The difference from the amount of decrease in the brightness of the incident light (hereinafter, referred to as "luminance difference" for convenience), which is reduced by the number of lines, becomes larger and smaller as the angle of intersection between the lines increases. The smaller it becomes. As a result, when there are a plurality of 10,000 lines intersecting with a predetermined number of lines, the reflection surface 1a is observed at a certain angle by appropriately adjusting the intersection angle between them, and the predetermined number of lines intersects with the predetermined number of lines. By setting the brightness difference between one of the 10,000 lines intersecting with the 10,000 line to be larger than the brightness difference between the other 10,000 lines, it is possible to recognize only the 10,000 lines that are related to the predetermined 10,000 lines. The brightness difference can be set to a level that cannot be recognized as a boundary line for other 10,000 lines. In this configuration, at least two latent images can be represented by making it possible to manifest and recognize only a predetermined number of lines according to the angle of the reflecting surface by utilizing this difference in brightness. ..

More specifically, as is well shown in FIG. 6, in this configuration, the third ten thousand lines 30 intersect both the first ten thousand lines 10 and the second ten thousand lines 20. Since the intersection angle “θ2” with the first ten thousand lines 10 is set to be larger than the intersection angle “θ3” with the second ten thousand lines 20, for example, the reflective surface 1a is set to the first. When observed at the angle "Θ1" of, the luminance difference between the first tenth line 10 and the third tenth line 30 is larger than the brightness difference between the second tenth line 20 and the third tenth line 30. As a result, although it is difficult to recognize the third many lines 30 formed in the background region "γ" in relation to the second many lines 20, the first many lines 10 Therefore, it is possible to make the first latent image A represented by the third universal line 30 manifest.

On the other hand, as is well shown in FIG. 7, the fourth ten thousand lines 40 intersecting the third ten thousand lines 30 are the first ten thousand lines 10 and the second ten thousand lines 20 in the same manner as the third ten thousand lines 30. The crossing angle "θ4" with the second ten thousand lines 20 is set to be larger than the crossing angle "θ5" with the first ten thousand lines 10 even though it intersects with both of them. Therefore, for example, when the reflecting surface 1a is observed at a second angle "Θ2" different from the first angle "Θ1", the brightness between the second and fourth ten thousand lines 20 and the fourth ten thousand lines 40 The difference is greater than the luminance difference between the first ten thousand lines 10 and the fourth ten thousand lines 40, and as a result, the fourth ten thousand lines 40 formed in the background region "γ" are the first ten thousand lines. Although it is difficult to recognize in relation to the line 10, it can be easily recognized in relation to the second many lines 20, and therefore, the second represented by the fourth many lines 40. It is possible to make the latent image B of the above manifest.

In this way, even if the same reflecting surface 1a is observed, when observed at the first angle "Θ1", the third ten thousand lines 30 are referred to as the background region "γ", especially the first region "α". On the other hand, when observed at the second angle "Θ2", the fourth ten thousand lines 40 can be seen in the background region "γ", especially in the second region "β". The two latent images that can be manifested and recognized in relation to "A" and can be provided through these actions, that is, the first latent image "A" that is manifested by the third gamma 30. Provided is a reflector 1 having a reflecting surface 1a including a second latent image “B” manifested by a fourth gamma 40.

As is clear from the above description, the intersection angle "θ2" between the first Mansen 10 and the third Mansen 30 and between the second Mansen 20 and the fourth Mansen 40. The crossing angle "θ4" of each is preferably about 90 degrees, and the crossing angle "θ1" between the first ten thousand lines 10 and the second ten thousand lines 20 is about 45 degrees. Is preferable. This is because it is generally considered that the difference in brightness becomes the largest when the angle is set to such an angle. However, these crossing angles can be freely adjusted within a range in which a brightness difference can be generated according to the principle of the present invention described above. For example, "θ2" and "θ4" are sufficiently practical if they are within a range of at least 90 degrees ± 10 degrees, and "θ1" is sufficiently practical if they are within a range of at least 45 degrees ± 10 degrees. Can withstand. Therefore, the above-mentioned "about 90 degrees" and "about 45 degrees" include at least these ranges.

Examples and comparative examples will be described.
[Example 1]
In the printed matter 1 of Example 1, a biaxially stretched polyester film having a thickness of 188 μm was used as the base material 5. The base material 5 was colored by an offset sheet-fed printing machine equipped with an ultraviolet irradiation device. The colors include various colors of KCMY. Next, UV HJK underprint varnish (T & K TOKA Co., Ltd.) as an underprint ink was applied to the colored base, and each width was 0.075 μm only on the portion forming the concave lines 10-1 to 40-1. (Corresponding to the "separation distance k" in FIG. 8), and the concave lines 10-1 to 40-1 are 0.225 μm each other (to the “line width n” in FIG. 8). Corresponding) were given in a state of being evenly separated. This underprint ink contains a liquid repellent. Finally, UV coat varnish HTA-W (T & K TOKA Co., Ltd.), which is a flexoneis as a topcoat ink, was applied to the entire base including the portion to which the underprint ink was applied. At this time, the convex lines 10-2 to 40-2 are repelled by the concave lines 10-1 to 40-1, and finally the convex lines 10-2 to 40-2 are concave. Lines 10-1 to 40-1 remained only in the portion separated from each other. As is clear, each width of the convex lines 10-2 to 40-2 is 0.225 μm (to the “line width n” in FIG. 8), which is the same as the separation distance of the concave lines 10-1 to 40-1. Corresponding). In particular, the amount of the topcoat ink applied is the surface 52a of the convex lines 10-2 to 40-2, which is the surface of the topcoat ink, and the concave lines 10-1 to 40, which are the surfaces of the underprint ink. The dimension "m" between the surface 51a and the surface 51a of -1 was adjusted to be 7 μm. After the treatment in each device, the ink and the like were ultraviolet-cured by the ultraviolet irradiation device connected to each device.

In Examples 2 to 4 and Comparative Examples 1 to 4, only the sizes of the "line width n" and the "separation distance k" in FIG. 8 were changed, and other conditions were the same to produce printed matter.

For each of these Examples and Comparative Examples, quality evaluation was performed for "roughness of all lines" and "remaining varnish". The evaluation results are shown in Table 1 below. FIG. 9 is a diagram in which the evaluation results are plotted with the "line width n" and the "separation distance k" as the horizontal axis and the vertical axis, respectively.

[Table 1]

In Table 1 and FIG. 9, the “line width n” corresponds to each width of the convex lines 10-2 to 40-2, in other words, the width “n (μm)” of the convex portion 52 shown in FIG. On the other hand, the "separation distance k" corresponds to each width of the concave lines 10-1 to 40-1, in other words, the separation distance "k (μm)" of the convex lines 10-2 to 40-2. do.

"Roughness of many lines" is an evaluation of whether or not the parallel lines forming the many lines can be clearly seen. Thirty evaluators visually evaluated the roughness of all lines in the same environment with the eyes separated from the reflecting surface 1a by about 30 cm. Each evaluator evaluated the roughness with either "○ (good)" or "x (coarse)", and the one with the larger number of evaluations was adopted as the evaluation result.

“Remaining varnish” is an evaluation regarding whether or not a layer 52 of the topcoat ink, that is, flexonis remains on the surface (bottom surface of all lines) 51a of the layer 51 of the underprint ink. As described above, the layer 52 is also applied to the layer 51 of the underprinting ink, and it was visually evaluated whether or not the layer 52 was sufficiently repelled. The visual inspection was performed under the same conditions and methods as the "roughness of all lines". Each evaluator evaluated the remaining degree of varnish as either "absent (not remaining)" or "presence (remaining)", and the one with the larger evaluation number was adopted as the evaluation result.

The "comprehensive evaluation" is "○ (good)" by the same evaluator, considering whether or not it is practically usable after considering the evaluation results of "roughness of all lines" and "remaining varnish". , "△ (normal)" or "x (bad)" was evaluated, and the one with the largest number of evaluations was adopted as the evaluation result. In FIG. 9, these displays are used as each plot.

As can be inferred from FIG. 9, the “line width n” is preferably 0.2 to 0.35 μm when the line width is uniform, and the “separation distance k” is uniform. In the case of, it became clear that it is preferably 0.05 to 0.1 μm. In addition, the "comprehensive evaluation" revealed that the residue of the varnish had a great effect on practical use.

The present invention is not limited to the above-described embodiment, and various other modifications can be made.
For example, if the brightness difference can be generated according to the principle of the present invention, the universal wire does not necessarily have to be formed by utilizing the unevenness. For example, the chromaticity and the like of all the lines may be changed to generate the brightness without making the unevenness.

Further, in the above-described embodiment, a reflector having a reflecting surface including two latent images is exemplified, but a reflecting body having a reflecting surface including three or more latent images can also be used. More specifically, in addition to the first and second regions, a third region or the like on which the fifth 10,000 lines or the like similar to the first to fourth 10,000 lines spreads is further provided to correspond to the third region or the like. Then, a sixth ten thousand lines or the like intersecting the six ten thousand lines are provided to form a reflector having a reflecting surface including three or more latent images including a third latent image represented by the sixth ten thousand lines. You can also do it.

Yet another aspect, feature and effect of the present invention is facilitated from the following detailed description, merely showing a number of specific embodiments and examples, including the best aspects intended to carry out the present invention. Will be clear. The present invention can also be configured in other and different embodiments, and many details thereof can be modified in various obvious viewpoints without departing from the spirit and scope of the present invention. Therefore, the drawings and description are merely examples and are not limited thereto.

1 Reflector 1a Reflective surface 10 First ten thousand lines 20 Second ten thousand lines 30 Third ten thousand lines 40 Fourth ten thousand lines 51 Underprint ink layer 51a Concave line surface 52 Topcoat ink layer ( Flexonis for printing)
52a Surface of convex line A First latent image B Second latent image α First region β Second region γ Background region

Claims (11)

A background area in which the first region defined by the first 10,000 lines and the second region defined by the second 10,000 lines formed at an angle different from that of the first 10,000 lines overlap.
At an angle that intersects both the first 10,000 lines and the second 10,000 lines, and the intersection angle between the first 10,000 lines is larger than the intersection angle between the second 10,000 lines. In the set state, a third universal line that manifests the first latent image formed in the background region of the reflective surface, and
At an angle that intersects all of the first to third ten thousand lines, and in a state where the intersection angle with the second ten thousand lines is set to be larger than the intersection angle with the first ten thousand lines. , A fourth line that manifests a second latent image formed in the background region of the reflective surface, and
A reflector characterized by having a reflective surface comprising at least. The reflector according to claim 1, wherein each of the first to fourth lines includes concave lines and convex lines arranged alternately next to each other. The reflector according to claim 2, wherein the surface of the convex line is covered with a printing varnish. The reflector according to claim 3, wherein the surface of the concave line is formed of a material that repels the varnish. The reflector according to claim 3 or 4, wherein the printing varnish is a flexone varnish. The reflector according to any one of claims 2 to 5, wherein the dimension between the surface of the convex line and the surface of the concave line is 1 to 8 μm. The reflector according to any one of claims 2 to 6, wherein each width of the first convex line is uniform and is 0.2 to 0.35 μm. The reflector according to any one of claims 2 to 7, wherein the distance between the convex lines is uniform and is 0.05 to 0.1 μm. The angle of intersection between the first and third lines and the angle of intersection between the second and fourth lines are about 90 degrees, respectively. The reflector according to any one of claims 1 to 8. The reflector according to any one of claims 1 to 9, wherein the angle of intersection between the first ten thousand lines and the second ten thousand lines is about 45 degrees. The reflector according to any one of claims 1 to 10, which is a printed matter.

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