JP2002132158A - Label having forgery check function and reuse check function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label which has a forgery check function and enables a user to check the fact that the label is stripped and restuck to copied merchandise, if such fact occurs, and which is useful for the decision of the true from the false of the merchandise. SOLUTION: This label is provided with a transparent film 3 on the front surface side of paper 1 and is provided with a tacky adhesive layer 5 on the rear surface side of the paper and is further formed with a fluorescent color developing layer 4 which emits visible light and develops colors when irradiated with UV rays or IR rays between the paper and the tacky adhesive layer or on the rear surface side of the tacky adhesive layer. The color development patterns by the fluorescent color developing layer are observed by the irradiation with the UV rays or IR rays and therefore the forgery check of the label is made possible. When the label stuck to genuine products is stripped, the stripped label is reusable at a glance but the base material of the paper is destroyed and therefore the color development patterns by the fluorescent color developing layer at least partly lack and even if such label is restuck to the forged products, the label which is reused is easily identified when the label is irradiated with the UV rays or IR rays. The reuse check function is thus exhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label, and more particularly to a label used to indicate that it is genuine by sticking it to electric / electronic products and parts, CD and DVD software cases, automobile / aircraft parts, and the like. The present invention relates to a label which has a forgery check function, and which can be checked for its fact when it is peeled off and re-applied to a copy product, and which is useful for authenticity determination of the product.

[0002]

2. Description of the Related Art A label used directly or on a package or the like to indicate that a product is genuine is provided with a forgery check function on the label itself, and the label itself is relied on. Conventionally, various proposals have been made based on a technical idea of trying to determine the authenticity of a product.

For example, Japanese Patent Application Laid-Open No. 63-278088 discloses that a letter A is printed on the back of a brittle film with an ink containing an ultraviolet colorant or an ultraviolet absorber, and a primer coat layer is provided on the back. Further, a label is described in which a letter B is printed after printing the letter B with normal ink on the back surface, and the printed film is attached on an adhesive layer having a release paper adhered to the back surface. .

That is, this label has a structure in which a brittle film / character A print layer / primer coat layer / character B print layer / colored print layer / adhesive layer / separator are laminated in this order from the front side. I have.

[0005] This label is used by peeling off the release paper to expose the pressure-sensitive adhesive layer and affixing it to an arbitrary place such as a product or its packaging container.

[0006] Under normal sunlight, only the character B print layer indicating the product name, the manufacturer name, and the like is observed from the surface, but when irradiated with ultraviolet light using a black light or the like, the character B print layer is added. As a result, the character A print layer can be identified, thereby obtaining a forgery check effect.

[0007]

However, even if the label itself is provided with a forgery check function, if the label is delicately peeled off and affixed to the forged product so as not to impair the forgery check function, the forged product is no longer used. It will not be possible to determine that there is.

Therefore, in order to eliminate this, it is necessary to provide not only a counterfeit check function but also a reuse check function to the label.

In the above-mentioned label according to the prior art, since the base material is usually broken in the brittle film on the surface when peeled off, the label cannot be reused anymore. Is effectively prevented.

[0010] On the other hand, however, this will motivate those who intend to illegally manufacture and sell counterfeit products to remove the label without destroying the brittle film. For example, it is not impossible to peel off the pressure-sensitive adhesive layer at a portion of the pressure-sensitive adhesive layer by heating the pressure-sensitive adhesive layer to a temperature equal to or higher than the softening point temperature or, on the contrary, by rapidly cooling with a special refrigerant. When the label is peeled off with the adhesive layer in this manner, the peeled-off label contains both the character A print layer and the character B print layer as they are. Cannot be determined.

[0011] Therefore, when a forger is peeled off the label attached to the genuine product, it is assumed that the peeled label can be reused, but this is actually applied to the counterfeit product. It is desirable to develop a label that can be easily recognized by a predetermined identification operation when the label is reused.

[0012]

In order to achieve this object, according to the present invention, a transparent film is provided on the front side of a paper base, and an adhesive layer is provided on the back side of the paper base. Further, a fluorescent coloring layer that emits visible light when irradiated with ultraviolet rays or infrared rays is formed between the paper base and the adhesive layer or on the back side of the adhesive layer, and the paper base is removed when the label is peeled off. A label having a forgery check function and a reuse check function, characterized in that the base material is destroyed.

According to a second aspect of the present invention, on the surface side of the paper base material, a first fluorescent coloring layer and a transparent film, which emit and emit visible light when irradiated with either ultraviolet light or infrared light, are sequentially provided. At the same time, an adhesive layer is provided on the back side of the paper base material, and a second fluorescent coloring layer that emits visible light when exposed to the other of ultraviolet light and infrared light is provided between the paper base material and the adhesive layer. Formed on the back side of the layer,
A label having a forgery check function and a reuse check function, wherein the paper base material is destroyed when the label is peeled off.

According to a third aspect of the present invention, in the label according to the first or second aspect, the interlayer strength of the paper base material measured by the B method of JISP 8139 is 1.3 N or less, or JIS P The surface pick-up value on the adhesive layer side of the paper substrate measured by the wax method of 8129 is 14A or less. When the paper base material satisfies any one of these conditions, the paper base material can be reliably broken when the label is peeled off.

Here, the condition that the surface pick value of the adhesive layer side of the paper base material is 14 A or less is not limited to the case where the paper picking step is achieved, but also that the coating material is applied to the surface of the paper base material on the adhesive layer side. The present invention may also be applied to a case where a layer is provided and the surface pick value of the coating layer is set to 14A or less.
Such a coating layer can be easily obtained by coating a coating material having a higher pigment composition ratio of a coating agent composed of a pigment and a resin component, which is generally used for coated paper.

The fluorescent coloring layer in the present invention does not necessarily mean that the label is laminated over the entire label, but also includes a layer that is partially laminated by printing or the like. I have.

[0017]

FIG. 1 shows a configuration of a label according to an embodiment of the present invention. A transparent polyester film 3 having a normal print 2 on its back is laminated on the surface of a paper 1, On the back surface of the paper 1, a fluorescent printing layer 4, an adhesive layer 5 and a release paper 6 are sequentially laminated.

The normal printing 2 means that the label is displayed on the back surface of the transparent polyester film 14 using normal ink in order to display a certain source such as a product name, a manufacturer name or a logo to be displayed. It was reverse-printed,
Under normal sunlight, the printed product name, indication of source, and the like can be visually identified from the front side through the transparent polyester film 3. The normal print 2 is preferably a partial print or a print pattern of characters only, so that the color development of the fluorescent print layer 4 by ultraviolet irradiation can be easily identified from the front side.

The fluorescent print layer 4 is formed by printing a predetermined pattern on the back surface of the paper 1 with an ink using an ultraviolet-excited visible light-emitting pigment or dye that emits visible light when irradiated with ultraviolet light. As the print pattern, for example, a form in which the logo is entirely printed as a ground pattern is preferable.

The label is used after peeling off the release paper 6 to expose the pressure-sensitive adhesive layer 5 and then affixing the label to an arbitrary place such as a product or its packaging container.

In the label of this embodiment, the fluorescent printing layer 4
Implements both a forgery check function and a reuse check function. That is, when ultraviolet light is irradiated from the surface side with black light or the like, a print pattern of the fluorescent print layer 4 that is not observed with normal light is observed,
The authenticity of the label itself can be determined based on whether or not the observation is possible, and a forgery check function is provided. Therefore, paper 1
Must have sufficient transparency.
A paper having an opacity of 92% or less specified in P8138 is used.

When the label attached to the genuine product is to be peeled off as described above, the material breaking strength of the paper 1 is smaller than the material breaking strength of the transparent polyester film 4, and
Since the adhesive strength between the pressure-sensitive adhesive layer 5 and the label adherend is greater than the material breaking strength of the paper 1, at least a portion of the paper 1 is peeled off while remaining on the pressure-sensitive adhesive layer 5 side. in this case,
On the stripped label side, the transparent polyester film 4 constituting the surface layer of the label remains intact without being destroyed, and the normal printing layer 2 is also formed on the surface of the torn paper 1. , The counterfeiter tends to be able to reuse this stripped label. However, since the printed pattern of the fluorescent printing layer 4 is at least partially lacking in the stripped label, even if the label is reattached to a counterfeit product, the fluorescent printing layer 4 is not irradiated when irradiated with ultraviolet light using a black light or the like. Is observed, and it can be easily determined that the printed pattern has been reused. Thereby, a reuse check function is exhibited.

The following experiment was conducted in order to confirm the conditions of the paper 1 necessary for giving such a reuse check function to a label.

No. having a basis weight of 35 g / m ² . Papers 1 to 7 and a biaxially stretched polyester film having a thickness of 25 μm are dry-laminated using a two-component urethane-based adhesive, and an ultraviolet-excited coloring ink (emission color: yellow-green) is applied to the surface of the obtained laminated paper. ), A gravure printing layer of a grid pattern with a line width of 1 mm and a line interval of 5 mm is provided, and the printing surface of the grid pattern is adhered with a strong adhesive / permanent two-part acrylic adhesive and release paper. After processing, this sheet is
The test piece was cut into a circle having a diameter of mm.

For the paper used for each test piece, JIS P
The surface pick value of the side to be tack-processed by the wax method specified in 8129 was measured.
When the interlayer strength in both the vertical and horizontal directions was measured by the method B defined in the above, the measurement results as shown in the right column of the table in FIG. 5 were obtained.

After peeling off the release paper of each test piece,
After affixing to a 0.5 mm thick sheet of polypropylene (PP) and ABS and leaving it to stand for 24 hours, three conditions: normal temperature, cooling with dry ice on a test piece, and heating while heating with a dryer Then, each was carefully peeled off. When no defect was found in the grid-like print pattern when the peeled test piece was irradiated with ultraviolet light using black light from the film side, x indicates that a piece of paper was taken on the sheet side and there was a defect in the grid-like print pattern. The case where it was recognized was evaluated with ○, and is shown in the left column of the table in FIG.

Paper having a weaker value of the vertical and horizontal interlayer strength (interlayer strength) of 1.3 N or less (No. 4, 5) or a surface pick value of 14 A or less (No. 3 to 7) The test pieces used were evaluated as ○ under any of the conditions. The test pieces using the papers of Nos. 1 and 2 were evaluated as x under some conditions.

From these results, in order to provide the label of the present invention with the above-mentioned reuse check function under any condition, the paper as the base material must have an interlayer strength of 1.3.
It has been confirmed that it is necessary to satisfy the requirement that the surface pick value is not more than N or the surface pick value is not more than 14A.

When the surface pick value is 14 A or less, when the test piece is to be peeled off from the sheet, the fuzz on the surface of the paper is partially peeled off from the base material, so that the grid-like printing pattern collapses. When the interlaminar strength is 1.3 N or less, the surface layer of the paper is peeled off from the substrate together with the adhesive layer, and the grid-like printing pattern is broken. Although there is a difference in the specific manner in which the lattice-shaped print pattern causes a defect as described above, the lattice-shaped print pattern is broken when the label is peeled off in any case. This is the same in that the function of checking reuse is exhibited by observing a defect in the grid-like print pattern due to the irradiation of ultraviolet rays.

FIG. 2 shows a configuration of a label according to another embodiment of the present invention, in which a transparent polyester film on which the normal printing 12 is applied on the back surface and the infrared color printing layer 13 is formed on the back surface of paper 11. 14 is laminated,
On the back surface of the paper 11, an ultraviolet coloring printing layer 15, an adhesive layer 16
And release paper 17 are sequentially laminated.

In this label, paper 11, normal printing 1
2, the adhesive layer 16 and the release paper 17 are substantially the same as the paper 1, the normal print 2, the adhesive layer 5 and the release paper 6 in the label of FIG.

The infrared color printing layer 13 is formed by reverse printing a predetermined pattern on an underside of the transparent polyester film 14 with an ink using an infrared-excited visible light-emitting pigment or dye that emits visible light when irradiated with near-infrared light. Formed by In this embodiment, the normal printing 12 and the infrared color printing 1
3, both of which are performed, regardless of the order of their printing,
After forming the infrared color printing layer 13 on the back surface of the transparent polyester film 14, the normal printing 12 may be reverse-printed, and this may be laminated on the surface of the paper 11, or conversely, the normal printing 12 may be printed on the back surface side. After the application, the transparent polyester film 14 on which the infrared coloring print layer 13 is formed may be laminated on the surface of the paper 11.

However, in order to make each print pattern easily visible from the front side, as shown in FIG. 2, it is preferable that each of them is formed as a partial print or a print pattern of only characters and is formed so as not to overlap each other.

In the label of this embodiment, the label forgery checking function is realized by the infrared color printing layer 13 and the ultraviolet color printing layer 15, and the label reuse checking function is realized entirely by the ultraviolet color printing layer 15.

First, the counterfeit check function realized by the infrared color printing layer 13 will be described. Since the printing pattern of the infrared color printing layer 13 can hardly be recognized by ordinary light, this label is directly or indirectly attached to the target product. In some cases, a third party who manufactures or sells a counterfeit or counterfeit product may receive the infrared color printing layer 1.
Often, you do not notice the existence of 3. For this reason, the third party creates a label without the infrared color printing layer 13,
This is affixed to a counterfeit or counterfeit product in the same manner as a genuine product, and the user tries to sell it as if it were a genuine product. However, by irradiating infrared rays, the printing pattern of the infrared coloring print layer 13 that should have been formed on the back surface of the transparent polyester film 14 of the label in the case of a genuine product is not formed, that is, the product is not a genuine product. Turns out immediately.

[0036] Such product authenticity determination is of interest to even general consumers, but it is important to promote the quality of its products by excluding counterfeit products and counterfeit products to ensure the quality of their products. Very important for sellers. Considering such an application, the embodiment of FIG. 2 in which authenticity can be determined only by using an infrared lamp which is generally not easily available, rather than a general consumer who can easily determine the authenticity with the naked eye. Can be said to have tremendous practical utility.

Since an infrared-excited visible light-emitting pigment or dye generally appears white under normal light, if an infrared-colored printing layer is provided on the surface of the transparent polyester film 14, the printing pattern of the infrared-colored printing layer can be formed even under normal light. Is easily visible, and its existence is easily recognized. Further, according to the experiment, the color of the infrared-colored printing layer 13 when the infrared ray is irradiated from the front side of the label with an infrared lamp is as follows.
When the transparent polyester film 14 is laminated, a clearer image with higher color development is observed. Furthermore, if the infrared coloring print layer 13 is exposed on the label surface, the print pattern may be recognized by touch. For these reasons, it is preferable to laminate the transparent polyester film 14 on the outer layer side of the infrared color printing layer 13.

The ultraviolet-colored printing layer 15 is an ink using an ultraviolet-excited visible light-emitting pigment or dye that emits visible light when irradiated with ultraviolet rays on the back surface of the paper 11 and has the same printing pattern as the infrared-colored printing layer 13. Alternatively, it is formed by printing on a different arbitrary pattern.

The ultraviolet coloring printing layer 15 is useful together with the infrared coloring printing layer 13 for judging the authenticity of the label, and is also used for judging whether or not the label has been re-applied and reused.

The counterfeit check function of the ultraviolet coloring print layer 15 is almost the same as that of the infrared coloring printing layer 13 described above, but the authentication is performed by using two kinds of different light rays, infrared rays and ultraviolet rays. This further enhances the forgery check function as a label.

The reusability check function by the ultraviolet coloring printing layer 15 is described in the label of FIG.
Is the same as the function exhibited by That is, if the user tries to remove the label of FIG.
Is smaller than the material breaking strength of the transparent polyester film 14 and the adhesive strength between the pressure-sensitive adhesive layer 16 and the label adherend is larger than the material breaking strength of the paper 11. At least a part is peeled off while remaining on the adhesive layer 16 side. In this case, on the peeled label side, the transparent polyester film 14 constituting the surface layer of the label remains intact without being destroyed, and the normal printing 12 is also formed on the surface of the torn paper 11. The counterfeiter tends to think that the stripped label can be reused because it remains in the closed state. However,
Since the printed pattern of the ultraviolet-colored printing layer 15 is at least partially missing in the peeled-off label, even if the label is re-attached to a counterfeit product, the ultraviolet-colored printing layer 15 is not irradiated when irradiated with black light or the like. Is observed, and it can be easily determined that the printed pattern has been reused. Thereby, a reuse check function is exhibited.

Example 1 As a specific example of the label shown in FIG.
m biaxially stretched transparent polyester (PE
T) The letter “A” was gravure-printed 2 on the back surface of the film 3 using black ink, and the obtained printed PET film 3 was subjected to test piece No. 2 in the table of FIG. 5 papers (basis weight 32g
/ M ² , interlayer strength 1.20 N, surface pick value 8A) The surface opposite to the surface showing a surface pick value 8A of 1 was dry-laminated using a conventional adhesive and bonded.
On the paper surface side of the obtained PET3 / paper 1 laminated paper, an ultraviolet-excited visible light-emitting pigment LUMILU that emits yellow-green fluorescence with ultraviolet light
Gravure printing was performed using an ink obtained by mixing XYellow CD 397 (manufactured by Honeywell) with an acrylic emulsion, and an ultraviolet color printing layer 4 having a grid pattern with a line width of 1 mm and a line interval of 5 mm was provided. This lattice-shaped printing pattern surface was subjected to adhesive processing using a two-part acrylic adhesive 5 of a strong adhesive / permanent type and a release paper 6 to obtain a label having the configuration shown in FIG.

This label was cut into a circle having a diameter of 25 mm, the release paper 6 was removed, and the label was adhered to the ABS sheet with the adhesive layer 5. Then, when ultraviolet light was irradiated using a 4 W black light, a yellow-green grid-like fluorescent pattern in the ultraviolet-color-forming printing layer 4 was clearly observed around the black character “A” that is the normal print 2.

After sticking this label to the ABS sheet and leaving it to stand overnight, an attempt was made to carefully peel it off. However, the pressure-sensitive adhesive layer 5 and the paper 1 that had been delaminated were peeled off in a form in which part of the paper remained on the ABS sheet. Apply adhesive to the peeled label and re-use another ABS
When the label was adhered to a sheet and the reusable label was irradiated with 4 W black light, a clear omission was observed in a part of the yellow-green grid-like fluorescent pattern in the ultraviolet coloring print layer 4.

Example 2 As a specific example of the label shown in FIG.
m biaxially stretched transparent polyester (PE
T) The letter “A” is gravure-printed 12 on the back surface of the film 14 using black ink, and an infrared-excitation visible light-emitting pigment LUMILUX Gree that emits yellow-green fluorescence with infrared light.
Gravure printing was performed using an ink obtained by mixing nUC6 (manufactured by Honeywell) with an acrylic emulsion to provide an infrared color printing layer 13 having a dot-like pattern having a diameter of 2 mm and a pitch of 5 mm. The test piece No. in the table of FIG. 6
Paper (basis weight 38 g / m ² , interlaminar strength 1.07, surface pick value 14 A) The surface on the opposite side to the surface pick value 14 A of 1 was dry-laminated using a conventional adhesive. And stuck together. In the same manner as in Example 1, the fluorescent pigment LUMILUX Yellow CD397 (Honeyw
is manufactured by mixing gravure printing with an ink obtained by mixing the above-mentioned grid printing pattern 15 with a grid pattern having a line width of 1 mm and a line gap of 5 mm. The surface was subjected to adhesive processing using a strong adhesive / permanent two-part acrylic adhesive 16 and release paper 17, to obtain a label having the configuration shown in FIG.

This label was cut into a circle having a diameter of 25 mm, the release paper 17 was removed, and the label was adhered to the ABS sheet with the adhesive layer 16. And SUR made by US LASER PRODUCT
When infrared rays were irradiated to the E-FIRE MODEL 9P with a lamp equipped with the Infra-Red Beamfilter Model FL6, a yellow-green dot-like print pattern in the infrared color print layer 13 was clearly observed. In addition, when ultraviolet light was irradiated using a 4W black light, a yellow-green grid-like fluorescent pattern in the ultraviolet coloring print layer 15 was clearly observed around the black character "A" which is the normal print 2.

After sticking this label to an ABS sheet and leaving it to stand overnight, it was tried to peel it off carefully while heating it with a drier.
The sheet was peeled off while remaining partially on the sheet. An adhesive was applied to the peeled label, and the label was again attached to another ABS sheet. When the reused label was irradiated with infrared rays and ultraviolet rays,
In the infrared irradiation, the yellow-green dot-like print pattern in the infrared color print layer 13 was clearly observed as before the peeling, but in the ultraviolet irradiation, a part of the yellow-green lattice fluorescent pattern in the ultraviolet color print layer 15 was observed. Obvious omissions were noted.

The embodiments of the present invention have been described above with reference to the accompanying drawings, and more specific examples have been described. However, the present invention is not limited to these, and the present invention is not limited thereto. Various modifications can be made within the scope of the invention described in the scope. For example, in the label of FIG.
However, it goes without saying that this may be used as an infrared color printing layer.

In the label shown in FIG. 2, the infrared color printing layer 13 is provided on the front side of the paper 11 and the ultraviolet color printing layer 14 is provided on the paper 1.
1. On the other hand, the ultraviolet color printing layer 13 is provided on the front side of the paper 11 and the infrared color printing layer 14 is provided on the paper 1 side.
1 may be arranged on the back side.

The fluorescent printing layer 4 (FIG. 1) and the ultraviolet coloring printing layer 15 (FIG. 2) are not formed by printing on the back surfaces of the papers 1 and 11, but are formed on the surfaces of the adhesive layers 5 and 16 by an ink jet printer. Alternatively, the printing may be performed using a non-contact type printer such as the one described above.

Further, in each of the labels shown in FIGS. 1 and 2, the fluorescent coloring layer (FIG.
The fluorescent printing layer 4 in FIG. 2 and the ultraviolet color printing layer 15) in FIG. 2 are arranged between the papers 1 and 11 and the adhesive layers 5 and 16, and as shown in FIGS. It is apparent that the reusability check function can be similarly exerted even if it is disposed between the agent layers 5 and 16 and the release papers 6 and 17. Therefore, such an embodiment is also within the scope of the present invention. In this case, the fluorescent printing layers 4 and 15 are formed on the back surfaces of the adhesive layers 5 and 16 by printing in a predetermined pattern using an ink containing a fluorescent coloring material excited by ultraviolet light or infrared light using a non-contact printer such as an ink jet printer. After the printing layer is formed, the release papers 6 and 17 are polymerized.

The fluorescent printing layer 4 in the labels of FIGS. 1 and 3 and the infrared coloring printing layer 13 and the ultraviolet coloring printing layer 15 in the labels of FIGS. Or it was formed by printing in a predetermined pattern with an ink using a dye, but it is not necessarily a printing layer, and fibers containing these luminescent pigments or dyes are made into paper, dyed or impregnated. For example, a fluorescent coloring layer may be added internally.

Further, as long as the operation of the present invention is not impaired, additional layers can be laminated at arbitrary positions in addition to the layers constituting the label of the illustrated embodiment.

[0054]

As described above, according to the present invention, the forgery check function is exhibited by the fluorescent coloring layer included in the label, and at the same time, the label attached to the genuine product is peeled off and re-created on the genuine product. A reuse check function that can easily identify the fact even when affixed is displayed, so it is attached to electric / electronic products, CD / DVD software cases, automobile / aircraft parts, etc. to indicate that it is a genuine product. In addition, it is extremely useful as a label used to prevent reuse on copy goods.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a label according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a label according to another embodiment of the present invention.

FIG. 3 is a sectional view showing a modification of the label of FIG. 1;

FIG. 4 is a sectional view showing a modification of the label of FIG. 2;

FIG. 5 is a table showing the results of an experiment performed to confirm the conditions required for paper to provide a required reuse check function to a label.

[Explanation of symbols]

 Reference Signs List 1,11 Paper (paper base material) 2,12 Normal printing layer 3,14 Transparent polyester film (transparent film) 4 Fluorescent printing layer (fluorescent coloring layer) 5,16 Adhesive layer 6,17 Release paper 13 Infrared coloring printing layer (First Fluorescent Layer) 15 Ultraviolet Color Printing Layer (Second Fluorescent Layer)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shinichi Fukui Inside the Saitama Plant, Kagoshima 500 Dynic Co., Ltd., Saitama Prefecture (72) Inventor Yoshikatsu Takeda 500 Kashima, Kagoshima City, Fukuya, Saitama Inside the Saitama Plant F Terms (reference) 3E041 AA10 BA16 BB05 BB06 DB01

Claims (3)

[Claims] A transparent film is provided on the front side of a paper base, an adhesive layer is provided on the back side of the paper base, and a fluorescent coloring layer which emits visible light when irradiated with ultraviolet rays or infrared rays. Is formed between the paper base and the adhesive layer or on the back side of the adhesive layer, and the paper base is destroyed when the label is peeled off. Labels to have. 2. A first surface which emits and emits visible light when irradiated with either ultraviolet light or infrared light.
A fluorescent coloring layer and a transparent film are sequentially provided, and an adhesive layer is provided on the back side of the paper base material.
A second fluorescent coloring layer that emits and emits visible light when irradiated with the other of ultraviolet light or infrared light is formed between the paper base and the adhesive layer or on the back side of the adhesive layer. A label having a forgery check function and a reuse check function, characterized in that the base material is destroyed. 3. The paper substrate has an interlaminar strength of 1.3 N or less as measured by the B method of JIS P 8139 or the adhesive layer side of the paper substrate as measured by a wax method of JIS P 8129. The label according to claim 1 or 2, wherein the surface pick value is 14A or less.