JP6686764B2 - Scratch sheet - Google Patents

Description

  The present invention relates to a scratch sheet that makes it possible to visually recognize concealed information by performing a predetermined work.

  Conventionally, a sheet having a scratch structure that makes hidden information visible by forming a hiding layer on the information to be hidden and scratching (scratching, rubbing) the hiding layer with a coin or the like is used. There is. The sheet having such a scratch structure is used as a medium such as a lottery ticket or a lottery ticket, which needs to hide information. The applicant has also proposed various types of sheets having a scratch structure (scratch sheet) (see Patent Documents 1 and 2).

JP, 2013-22853, A JP, 2013-91233, A

  As described above, the scratch sheet is often used for lottery tickets, lottery tickets, etc., and is required to have entertainment properties. However, in the conventional scratch sheet, the hidden information is only made to appear by performing a predetermined work such as shaving or peeling the hiding layer.

  Therefore, it is an object of the present invention to provide a scratch sheet that not only allows the user to know the hidden information by performing a predetermined work but also allows the information to appear in stages.

In order to solve the above problems, in the first aspect of the present invention,
Base material,
An information recording layer formed on one surface of the substrate,
A peeling layer formed to overlap the information recording layer,
A first concealing layer which is formed on the release layer and has a relatively thick portion having a thick coating portion and a thin coating portion thinner than the thick coating portion;
A second concealing layer formed on the first concealing layer and having a relatively thick portion having a thick coating portion and a thin coating portion thinner than the thick coating portion;
Have
The thin coating portion of the second hiding layer overlaps the position corresponding to the thick coating portion of the first hiding layer, and the thick coating portion of the second hiding layer covers the position corresponding to the thin coating portion of the first hiding layer. Provided is a scratch sheet having overlapping parts.

  According to the first aspect of the present invention, the scratch sheet includes a base material, an information recording layer formed on one surface of the base material, a peeling layer formed to overlap the information recording layer, and a peeling layer to overlap the peeling layer. A first concealing layer having a thick coating portion that is a relatively thick portion and a thin coating portion that is thinner than the thick coating portion; A second hiding layer having a certain thick coating portion and a thin coating portion thinner than the thick coating portion is provided, and the thin coating portion of the second hiding layer overlaps a position corresponding to the thick coating portion of the first hiding layer. Since the thick coating portion of the second hiding layer overlaps the position corresponding to the thin coating portion of the first hiding layer, the effect of the release layer is The thick coating portion of the second hiding layer easily reaches the thick coating portion of the second hiding layer and is easily peeled from the first hiding layer. Therefore, only the thick-coated portion of the second hiding layer can be peeled off with an adhesive tape or the like, and the remaining first hiding layer and second hiding layer are scraped off with a coin or the like to cause information to appear in stages. It becomes possible.

  Further, in the second aspect of the present invention, in the scratch sheet, the thickness of the release layer is 1.0 μm to 3.5 μm.

  According to the second aspect of the present invention, since the thickness of the release layer is 1.0 μm to 3.5 μm, it is difficult to release the first concealing layer in contact with the release layer with an adhesive tape or the like, It becomes easy to peel off with a coin or the like.

  In the third aspect of the present invention, in the scratch sheet, the thickness of the thick coating portion of the first hiding layer is 3.0 μm to 5.0 μm, and the thin coating portion of the first hiding layer is Has a thickness of 0.5 μm to 1.5 μm.

  According to the third aspect of the present invention, the thickness of the thick coating portion of the first hiding layer is 3.0 μm to 5.0 μm, and the thickness of the thin coating portion of the first hiding layer is 0. Since the thickness is 5 μm to 1.5 μm, the influence of the release layer extends to the thick coating portion of the second hiding layer through the thin coating portion of the first hiding layer, while the influence of the peeling layer extends to the thick coating portion of the first hiding layer. There is a high possibility that the thin coating portion of the second concealing layer can be prevented from reaching the thin coating portion. Therefore, only the thickly coated portion of the second masking layer is more easily peeled from the first masking layer.

  According to the present invention, it is possible not only to know the hidden information but also to make the information appear stepwise by performing a predetermined work.

It is a figure which shows the scratch sheet which concerns on one Embodiment of this invention. It is a figure which shows the scratch sheet in the state which removed a part of 2nd concealment layer 5 using an adhesive tape etc. It is a figure which shows the scratch sheet in the state after being rubbed by the coin. FIG. 7 is a diagram showing a different example of the residual pattern of the second masking layer 5, which is obtained by the formation pattern of the thick coating portion of the first masking layer 4.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
<1. Structure of scratch sheet>
FIG. 1 is a diagram showing a scratch sheet according to an embodiment of the present invention. 1A is a plan view, and FIG. 1B is a cross-sectional view corresponding to the line AA in FIG. In FIG. 1, 1 is a base material, 2 is an information recording layer, 3 is a release layer, 4 is a first concealing layer, 5 is a second concealing layer, and 10 is a scratch sheet. The base material 1 plays a role as a support for supporting the information recording layer 2, the peeling layer 3, the first concealing layer 4 and the second concealing layer 5, and has a purpose / use such as a card or a printed matter. The appropriate thickness and size are used. On one surface, the other surface, or both surfaces of the base material 1, a printing layer on which predetermined information is separately printed with printing ink may be formed.

  As the hiding layer, there are two layers of the first hiding layer 4 and the second hiding layer 5, and the second hiding layer 5 is formed so as to overlap the first hiding layer 4. The first hiding layer 4 includes a thick coating portion 4a coated relatively thick and a thin coating portion 4b formed relatively thin. When viewed from the upper surface side, the thick coating portion 4a has a planar shape formed in a predetermined pattern. In the present embodiment, the thick coating portion 4a of the first concealing layer 4 is formed in a pattern in which rectangles (meaning including squares) are arranged in a grid pattern. The second concealing layer 5 also includes a thick coating portion 5a coated relatively thick and a thin coating portion 5b formed relatively thin. The thin coating portion 5b of the second hiding layer 5 overlaps the position corresponding to the thick coating portion 4a of the first hiding layer 4, and the second hiding portion is located at the position corresponding to the thin coating portion 4b of the first hiding layer 4. The thick coating portions 5a of the layer 5 overlap.

  The first hiding layer 4 and the second hiding layer 5 may have various colors, but it is necessary to make the information recording layer 2 opaque so that the information recording layer 2 is hard to see. Further, as will be described later, when a part of the second hiding layer 5 is peeled off with an adhesive tape or the like, the first hiding layer 4 and the second hiding layer 4 are separated so that the peeled part and the other part can be clearly distinguished. The color of the hiding layer 5 is preferably a different color so that it can be visually recognized. In the example of FIG. 1, the second hiding layer 5 also hides the presence of the first hiding layer 4, and the first hiding layer 4 is difficult to see. In the example of FIG. 1, when the second masking layer 5 also masks the presence of the first masking layer 4, the formation positions of the thick coating portions 4a of the first masking layer 4 are indicated by broken lines arranged in a grid pattern. It is shown by a rectangular frame.

  The information recording layer 2 is a layer in which predetermined information such as characters and patterns is recorded. The information recording layer 2 is concealed by the first concealing layer 4 and the second concealing layer 5 formed via the peeling layer 3 so as to be difficult to visually recognize.

  The peeling layer 3 is a layer formed so that the first hiding layer 4 can be easily peeled from the information recording layer 2. The peeling layer 3 is formed so as to cover the information recording layer 2. The first hiding layer 4 and the second hiding layer 5 are layers formed to hide the information recording layer 2. The first hiding layer 4 and the second hiding layer 5 are formed so as to overlap with the release layer 3. Therefore, the first hiding layer 4 and the second hiding layer 5 are also formed so as to cover the information recording layer 2.

  The first hiding layer 4 is a layer for hiding the information represented by the information recording layer 2, and is formed so as to cover the information recording layer 2. The first hiding layer 4 is formed using black ink or the like. Here, the adhesive tape or the like means, for example, a cellophane tape, a vinyl tape, a gum tape, or the like, or an adhesive or a tape coated with an adhesive.

  The second concealment layer 5 is a layer for concealing the information expressed by the information recording layer 2, and is formed so as to cover the information recording layer 2. The second concealing layer 5 is formed using silver ink or the like in order to allow visual distinction from the first concealing layer 4.

  Since the cross-sectional view of FIG. 1B shows the layer structure of the scratch sheet 10, the thickness ratio is different from the actual one. In reality, the width of the scratch sheet is several tens mm to several hundreds mm, while the thickness of the scratch sheet is about several hundreds μm. Further, in FIG. 1B, the thicknesses of the base material 1, the information recording layer 2, the peeling layer 3, the first hiding layer 4, and the second hiding layer 5 are shown to be the same. In reality, they have different thicknesses, as will be described later. The layer structure of the scratch sheet may be either the upper layer or the lower layer. However, for convenience of description, the second concealment layer 5 side will be described as the upper layer and the substrate 1 side will be described as the lower layer below.

  Examples of the substrate 1 include high-quality paper, art paper, coated paper, cast-coated paper, synthetic resin or emulsion-impregnated paper, synthetic rubber latex-impregnated paper, synthetic resin internal-addition paper, cellulose fiber paper, and other papers, polyolefin ( Polyethylene, polypropylene, etc.), polystyrene, polycarbonate, polyethylene terephthalate, polyvinyl chloride, plastic sheets of various synthetic resins such as polymethacrylate, and a white opaque film formed by adding a white pigment or a filler to these synthetic resins, Alternatively, a film (so-called synthetic paper) having fine voids (micro voids) inside the substrate can be used.

  The thickness of the base material 1 is not particularly limited, but is preferably 3 μm to 300 μm, and more preferably 20 μm to 175 μm. The color of the base material 1 is also not particularly limited, but it is preferably a color different from that of the information recording layer 2 so that the information expressed in the information recording layer 2 can be easily visually recognized.

  The information recording layer 2 is a layer in which predetermined information such as characters and patterns is recorded, as described above. Various information can be recorded as the predetermined information. For example, information indicating a number such as “12345” can be recorded and the scratch sheet can be used as a “lottery” for the lottery. The information recording layer 2 is formed by printing a known printing ink by a known printing method such as offset printing, gravure printing, screen printing, inkjet printing, and electrophotographic printing.

  The peeling layer 3 is a layer for facilitating peeling of the first hiding layer 4. Therefore, as the peeling layer 3, it is preferable to use one having low adhesiveness with the first hiding layer 4 so that the first hiding layer 4 can be easily peeled from the peeling layer 3. To form the release layer 3, for example, an acrylic resin, a vinyl resin, a polyester resin, a fibrous resin, a wax, or a melamine in which a release agent such as a fluorine resin, silicone, or various waxes is added or copolymerized. Resins and the like can be used. Further, in the present embodiment, the peeling layer 3 is preferably transparent in order to visually recognize the information recording layer 2 on the lower layer side. Further, the coating amount and coating thickness for forming the release layer 3 are not particularly limited, but the coating thickness is preferably 1.0 μm to 3.5 μm. This is because if the coating thickness of the release layer 3 is less than 1.0 μm, it becomes difficult to peel off the first concealing layer 4 with a coin or the like, and if it exceeds 3.5 μm, the risk of peeling by the adhesive tape increases. .

  The first concealing layer 4 is a layer that can be scraped off with a coin or the like, or can be peeled off with an adhesive (also including “adhesive”), and is a layer for concealing the information recording layer 2. Is. The first hiding layer 4 is formed by printing an ink with a high hiding property. Specifically, a pigment having a high hiding property is dispersed in a binder resin in a relatively large amount. If desired, the ink may contain a dye or an ordinary pigment for the purpose of coloring. The first hiding layer 4 is formed so as to overlap the peeling layer 3.

  Examples of the pigment having high concealing properties that composes the first concealing layer 4 and the second concealing layer 5 include silver powder, aluminum powder, brass powder, metal powder such as copper powder, calcium carbonate, zinc oxide, alumina, Titanium dioxide, silica, barium sulfate, talc, kaolin, clay, carbon black, resin powder or the like can be used. Further, as the binder resin forming the first hiding layer 4 and the second hiding layer 5, one that holds the above-mentioned pigment having a high hiding property is selected and used. For example, natural rubber or rubber type natural resin such as hydrochloric acid rubber, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, polyisoprene, polychloroprene, acrylic, vinyl chloride, or vinyl chloride-vinyl acetate copolymer Use coalescing. The colors of the first hiding layer 4 and the second hiding layer 5 are not particularly limited as long as they make it difficult to visually recognize the information recording layer 2.

  The first hiding layer 4 may be formed by a known printing method such as an offset printing method, a gravure printing method, a silk screen printing method, a flexo printing method, and the like, for example, black ink which is carbon black. The formation of the first concealing layer 4 is performed by forming the first layer so as to cover the entire peeling layer 3 and further forming the second layer in a pattern so as to overlap the first layer. The portion where the first layer and the second layer overlap is the thick coating portion 4a, and the portion where only the first layer is the thin coating portion 4b. Both the formation of the first layer and the formation of the second layer are performed by the known printing method as described above, but the formation of the first layer and the formation of the second layer may be performed by the same printing method, Different printing methods may be used.

  The coating amount and coating thickness for forming the first hiding layer 4 are not particularly limited, but the coating thickness of the first layer is preferably 0.5 μm to 1.5 μm, and the coating thickness of the second layer is 2 μm. It is preferably 0.5 μm to 3.5 μm. Therefore, the coating thickness of the thick coating portion 4a of the first masking layer 4 is in the range of 3.0 μm to 5.0 μm, and the coating thickness of the thin coating portion 4b of the first masking layer 4 is 0.5 μm to 1.5 μm. It becomes the range of. When it exceeds these ranges, the peeling component of the peeling ink forming the peeling layer 3 is not easily permeated properly beyond the thin coating portion 4b of the first hiding layer 4, and the thickness of the first hiding layer 4 is too thick. This causes a problem such as the influence exceeding the coating unit 4a.

  The second hiding layer 5 is a layer for facilitating peeling from the first hiding layer 4 with an adhesive tape or the like. Therefore, as the second concealing layer 5, it is preferable to use a material having high adhesiveness such that it is easily adhered to an adhesive tape or the like. For the formation of the second hiding layer 5, as described above, the same material as that of the first hiding layer 4 can be used. However, it is necessary to use a material having a higher adhesiveness such as an adhesive tape and a lower adhesiveness with the first hiding layer 4. The second hiding layer 5 may be formed, for example, by a known printing method such as an offset printing method, a gravure printing method, a silk screen printing method, a flexo printing method, and the like, such as silver ink in which metal powder is made into an ink.

  The coating amount and coating thickness for forming the second concealing layer 5 are not particularly limited, but in the thin coating portion 5b, the coating thickness is preferably 2 μm to 3 μm. In order to make the upper surface of the second hiding layer 5 a flat surface, in the thick coating portion 5a which is a portion overlapping the thin coating portion 4b of the first hiding layer 4, the first hiding layer 4 is further provided. The thickness of the second layer will be added.

  Here, the term “flat surface” means that the surface is recognized to have a uniform surface without any particular depressions or projections. Therefore, a surface which is microscopically present with irregularities of less than 1 μm but visually recognized as a flat surface is also included in the “flat surface”. More precisely, a flat surface means that the surface roughness Ra in the “roughness curve” excluding the “waviness curve” in the “surface roughness evaluation method” defined in JIS is 0. It means that it is from 01 to 1.0 μm (more preferably from 0.01 to 0.50 μm). However, in the present invention, when used as a scratch sheet, the flatness is sufficient so that the user does not feel discomfort.

  If the thickness of the second masking layer 5 in the thin coating portion 5b is less than 2 μm, the difference in thickness from the thick coating portion 5a becomes too large, and the possibility that good coating cannot be performed increases. If the thickness of the thin coating portion 5b of the second hiding layer 5 is more than 3 μm, the second hiding layer 5 may be entirely adhered to an adhesive tape or the like and the second hiding layer 5 may be peeled off. Therefore, the thickness of the thin coating portion 5b of the second hiding layer 5 is preferably thicker than the thickness of the thin coating portion 4b of the first hiding layer 4. Since the thickness of the thin coating portion 5b of the second masking layer 5 is larger than the thickness of the thin coating portion 4b of the first masking layer 4, the first masking including the thick coating portion 4a and the thin coating portion 4b is provided. This is because the second concealing layer 5 is stably formed even when it is stacked on the layer 4.

<2. Example>
As the base material 1, mat-coated paper “SWORD iJET (registered trademark) 4.3 mat” manufactured by Mitsubishi Paper Mills, Ltd. having a basis weight of 127.9 g / m ² was used.
First, the information recording layer 2 was formed on the substrate 1 by an inkjet printing method using a normal inkjet ink. In this embodiment, as shown in FIG. 3A, “12345” which is character information is formed.
In addition, using a normal offset ink, a predetermined message (in the example of Fig. 3 (a), "Scratch sheet""Rubbing with coins""Please peel off with tape", etc.) by the offset printing method, Other necessary patterns were printed.
Subsequently, a release ink was printed so as to cover the information recording layer 2. “UV Flexo UV Release Varnish Fluo Blue 9R0128V” manufactured by SICPA was used as the release ink.
The release ink was printed by a flexographic printing method so that the thickness when dried was 3 μm. As a result, the peeling layer 3 overlapping the information recording layer 2 was formed. At this time, the release ink was printed so as to cover the portion where the message "Please rub with coins" was also printed.

Further, black ink was printed uniformly on the peeling layer 3. As the black ink, "UV Flexo Scratch-Off Black 7UG7009" manufactured by SICPA was used. The black ink was printed by a flexographic printing method so that the thickness was 1 μm. This is a portion corresponding to the first layer of the first hiding layer 4.
Then, the same black ink was used to print in a pattern. The black ink was printed by a flexographic printing method so that the thickness was 3 μm. This is a portion corresponding to the second layer of the first hiding layer 4. The portion overprinted in a pattern form becomes a thick coating portion 4a having a thickness of 4 μm, and the portion not overprinted in a pattern becomes a thin coating portion 4b having a thickness of 1 μm.

Further, silver ink was printed over the black ink. As the silver ink, a mixture of "UV FlexoVarnish For Scratch Off Silver / Gold 880770" and "UV Silver Paste 880761" manufactured by SICPA at a mass ratio of 4: 1 was used. The silver ink was printed so that the thickness was 2 μm and the upper surface was a flat surface in the thin coating portion 5b that overlaps the thick coating portion 4a of the first hiding layer 4. Printing was performed by a flexographic printing method. In the thick coating portion 5a, which is a portion overlapping the thin coating portion 4b of the first hiding layer 4, 3 μm corresponding to the thickness of the second layer of the first hiding layer 4 is added, so that the thickness is 5 μm. Became. The portion coated with the silver ink becomes the second hiding layer 5.
As a result, the first concealing layer 4 and the second concealing layer 5 having a two-layer structure of black ink and silver ink were formed so as to overlap the peeling layer 3.
Also, silver ink was printed so as to cover the part where the message "Please rub with a coin" was also printed.
As a result, the scratch sheet as shown in FIG. 1 was completed.
The first hiding layer 4 is black containing carbon black, and the second hiding layer 5 is silver containing metal powder. Therefore, the first hiding layer 4 and the second hiding layer 5 pass through the information recording layer. It was difficult to visually recognize the information expressed in 2.

<3. Usage example>
In the scratch sheet 10 shown in FIG. 1, the first hiding layer 4 and the second hiding layer 5 are formed so as to cover the information recording layer 2. Since the first hiding layer 4 is black and the second hiding layer 5 is a silver ink, the information recording layer 2 cannot be visually recognized. Therefore, in the example of FIG. 1A, the message “Please peel with tape” is printed together with the arrow indicating the second concealing layer 5. As described above, in FIG. 1A, the formation positions of the thick coating portions of the first concealing layer 4 are shown by the rectangular frames arranged in a grid pattern. The frame is difficult to see.

  In the scratch sheet 10 shown in FIG. 1, the adhesive surface of the adhesive tape is brought into contact with the second concealment layer 5 in accordance with the message “Please peel off with tape”. At the location where the second masking layer 5 is formed, the adhesive surface of the pressure-sensitive adhesive tape comes into contact with the second masking layer 5. Then, the adhesive tape is peeled off from the scratch sheet 10.

  When the first hiding layer 4 is thin, the peeling component of the peeling ink forming the peeling layer 3 penetrates beyond the first hiding layer 4 and exerts an influence. Therefore, a peeling action is given to the thick coating portion 5a of the second hiding layer 5 that is in contact with the thin coating portion 4b of the first hiding layer 4, and the thick coating portion 5a of the second hiding layer 5 causes the first hiding layer 4 to come into contact. Will be peeled off from the thin coating portion 4b. When the first masking layer 4 is thick, the peeling component of the peeling ink that forms the peeling layer 3 does not penetrate beyond the first masking layer 4 and has no effect. Therefore, the thin coating portion 5b of the second hiding layer 5 does not have a peeling action on the thin coating portion 5b of the second hiding layer 5 that is in contact with the thick coating portion 4a of the first hiding layer 4, and the thin coating portion 5b of the second hiding layer 5 is the first hiding layer. 4 is not peeled off from the thick coating portion 4a.

  The first concealing layer 4 and the second concealing layer 5 can also be removed by suddenly scraping with a coin. However, when rubbed with a coin, the entire first concealing layer 4 is scraped off at once, and the entire information recording layer 2 becomes visible. Therefore, in order to change the visual recognition state in two steps, a message as shown in FIG. 1A is printed and urged to peel off only the second concealment layer 5 using an adhesive tape. It is preferable.

  When a part (thick coating portion 5a) of the second hiding layer 5 is peeled off, the scratch sheet 10 becomes in a state as shown in FIG. FIG. 2 is a diagram showing the scratch sheet in a state after the thick coating portion 5a of the second concealing layer 5 is peeled off by the adhesive tape. 2A is a plan view of the scratch sheet at this time point, and FIG. 2B is a cross-sectional view corresponding to the line BB in FIG. 2A. As shown in FIG. 2B, only the thick coating portion 5a of the second hiding layer 5 is peeled off from the original scratch sheet 10. When viewed from the surface of the scratch sheet 10, as shown in FIG. 2A, a pattern corresponding to the planar shape of the thick coating portion 4a of the first concealing layer 4 can be visually recognized. That is, the thin coating portion 5b of the second concealing layer 5 remains in a pattern in which rectangles, which are the shapes of the thick coating portion 4a of the first concealing layer 4, are arranged in a lattice, as shown in FIG. In addition, when the thick coating portion 5a of the second concealing layer 5 is peeled off by the adhesive tape, in reality, as shown in FIG. 2B, the step does not always appear clearly. FIG. 2B shows an ideal state, and the steps are clearly shown for convenience of explanation. However, even if the thick coating portion 5a is not peeled off in a rectangular cross section and the step does not appear clearly, if the pattern of the thick coating portion and the thin coating portion appears when viewed from the surface, the predetermined information is obtained. Will be obtained.

  Therefore, from the surface of the scratch sheet 10, a silver lattice pattern is visually recognized against the black background. As the colors of the first hiding layer 4 and the second hiding layer 5 are distinctly different, the pattern formed by the thick coating portion 4a of the first hiding layer 4 and the thin coating portion 5b of the second hiding layer 5 is formed. Will be clearly recognized. However, even if the colors are not different, if the inks forming the first hiding layer 4 and the second hiding layer 5 are different, the pattern can be recognized due to the difference in texture and gloss. It will be possible.

  Further, since the peeling layer 3 is formed on the message "rub with coins", the message "rub with coins" appears as shown in FIG. It becomes visible together with the arrow indicating the remaining position of the hiding layer 4.

  In the scratch sheet 10 shown in FIG. 2, when the first hiding layer 4 and the remaining second hiding layer 5 are rubbed with coins in accordance with the message “Please rub with coins”, the first hiding layer 4 and the remaining hiding layer 4 remain. The second concealing layer 5 that is present is scraped off by a coin. At this time, if the shaving force is large, the peeling layer 3 may also be shaving with a coin.

  As a result, the scratch sheet 10 is in a state as shown in FIG. FIG. 3 is a diagram showing the scratch sheet in a state after the first hiding layer 4 and the second hiding layer 5 are rubbed with a coin. That is, as shown in FIG. 3B, only the peeling layer 3 remains on the information recording layer 2. In the present embodiment, the peeling layer 3 has transparency such that it can be visually recognized through a thickness of several μm to several tens of μm. Therefore, when viewed from the surface of the scratch sheet 10, the character “12345” is displayed. It becomes possible to see. The example of FIG. 3 shows a state in which the first hiding layer 4 and the second hiding layer 5 are all removed, but, of course, depending on the state of rubbing with a coin, the first hiding layer 4 and the second hiding layer 4 may be removed. The hiding layer 5 may remain slightly. Even if the first hiding layer 4 and the second hiding layer 5 are slightly left, the target character “12345” may be sufficiently visible.

  For the user, the thick coating portion 5a of the second hiding layer 5 is removed by peeling with an adhesive tape, and the information expressed by the thick coating portion 4a of the first hiding layer 4 (see FIG. In this example, a pattern in which rectangles are arranged in a grid pattern) can be acquired. Then, the first concealing layer 4 and the remaining second concealing layer 5 are rubbed with a coin or the like to remove the first concealing layer 4 and the second concealing layer 5 and expressed by the information recording layer 2. Information can be obtained. In this way, the user can enjoy the scratch sheet twice step by step with one scratch sheet.

  In the above example, as shown in FIG. 2A, the thick coating portion 4a of the first hiding layer 4 was formed in a pattern in which rectangles were arranged in a grid pattern. Various patterns can be used as the formation pattern of the thick coating portion of the first hiding layer 4. FIG. 4 is a diagram showing a visible pattern when the thick coating portion 4a of the first hiding layer 4 has a different pattern. In the example of FIG. 4, the formation pattern of the thick coating portion 4a of the first concealing layer 4 has a shape of the character "coin". Therefore, the thin coating portion 5b of the second concealing layer 5 remains in the pattern of the character "coin" as shown in FIG. When the pattern formed by the thickly coated portion 4a of the first concealing layer 4 and the thinly coated portion 5b of the second concealing layer 5 is in the shape of the character "coin", the user suggests shaving with a coin. Since it can be determined that there is a message, it is possible not to print the message "Please rub with coins".

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Information recording layer 3 ... Release layer 4 ... 1st concealment layer 5 ... 2nd concealment layer 4a, 5a ... Thick coating part 4b, 5b ... ..Thin coating part 10 ... Scratch sheet

Claims (3)

Base material,
An information recording layer formed on one surface of the substrate,
A peeling layer formed to overlap the information recording layer,
A first concealing layer which is formed on the release layer and has a relatively thick portion having a thick coating portion and a thin coating portion thinner than the thick coating portion;
A second concealing layer formed on the first concealing layer and having a relatively thick portion having a thick coating portion and a thin coating portion thinner than the thick coating portion;
Have
The thin coating portion of the second hiding layer overlaps the position corresponding to the thick coating portion of the first hiding layer, and the thick coating portion of the second hiding layer covers the position corresponding to the thin coating portion of the first hiding layer. Scratch sheet characterized by overlapping parts.   The scratch sheet according to claim 1, wherein the release layer has a thickness of 1.0 μm to 3.5 μm. The thickness of the thick coating portion of the first hiding layer is 3.0 μm to 5.0 μm,
The scratch sheet according to claim 1 or 2, wherein the thin coating portion of the first hiding layer has a thickness of 0.5 µm to 1.5 µm.

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