JP2010156060A - Counterfeit-preventing form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a counterfeit-preventing form which can simply determine the genuineness or spuriousness of documents. <P>SOLUTION: In the counterfeit-preventing form 1, an adhesiveness-adjusting layer 3 for lowering the adhesiveness of a fluorescent layer 4 to a form substrate 2 is disposed between the form substrate 2 and the fluorescent layer 4. Therefore, when a part of letters fixed to the counterfeit-preventing form 1 is shaved off to falsify a document P1 made from the counterfeit-preventing form 1, the fluorescent layer 4 is also shaved off. The presence or absence of the peeling of the fluorescent layer 4 can simply be determined by irradiating with ultraviolet rays the document P1 to ascertain the presence or absence of a fluorescent light-emitting region. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an anti-counterfeit paper.

  In the past, there have been many cases in which official certificates such as other person's identification documents are obtained, and personal information described therein is rewritten to create fake certificates for use in crime. In particular, a document printed by a laser printer has only a toner used for printing fixed to a paper base material by heat, and has a lower adhesive force than printing ink or the like. For this reason, there is a problem that it is relatively easy to forge a document by a method of scraping off the toner fixed on the paper base material and printing another character or the like thereafter.

In order to solve such problems, for example, a forgery prevention technique described in Patent Document 1 has been proposed. This technology makes it difficult to print a different character after cutting the printed character by forming on the paper a thermal colorant layer that develops color in response to the printed character. is there.
JP 7-225488 A

  However, the above method requires the use of special paper provided with a heat-sensitive color former layer, and there is a problem that the cost of document preparation increases. In particular, it is not practical to use in developing countries that suffer from frequent forgery.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to provide a forgery prevention sheet that can easily determine the authenticity of a document.

  As means for solving the above problems, the anti-counterfeit paper according to the first invention is arranged on a paper base and a printing surface side on which printing is performed on the paper base, and is not visible under visible light. A fluorescent layer containing a fluorescent substance that is visible by irradiation with light in a wavelength region, and the adhesive layer is disposed between the paper base and the fluorescent layer to reduce the adhesion of the fluorescent layer to the paper base. An adhesion adjusting layer.

  Further, the anti-counterfeit paper of the second invention is a paper base material containing a fluorescent dye that is visible under irradiation of light in an invisible wavelength region that cannot be seen under visible light, and printing on which the paper base material is printed. A paper having a specific wavelength light absorbing layer disposed on a surface side and including a light absorbing layer having a light absorber in an invisible wavelength region; And an adhesion adjusting layer for reducing adhesion to the substrate.

  According to the present invention, an adhesion adjusting layer for reducing the adhesion of the fluorescent layer or the specific wavelength light absorption layer to the paper substrate is provided between the paper substrate and the fluorescent layer or the specific wavelength light absorption layer. ing. Therefore, if an attempt is made to falsify a document created using this anti-counterfeit paper, and part of characters fixed on the anti-counterfeit paper is scraped off, both the fluorescent layer and the specific wavelength light absorption layer are also scraped off. . Whether or not the fluorescent layer is peeled off can be easily determined by irradiating the document with light of a specific wavelength such as ultraviolet rays and confirming whether or not there is a region that does not emit fluorescence. In addition, whether or not the specific wavelength light absorption layer is peeled off is determined by irradiating the document with light of a specific wavelength such as ultraviolet rays, so that the specific wavelength light absorption layer does not block the light of the specific wavelength and is included in the paper substrate. This can be easily performed by confirming whether or not there is a region where fluorescence derived from the substance is emitted. Thus, if a document is prepared using the anti-counterfeit paper of the present invention, the authenticity of the document is confirmed by irradiating light at a specific wavelength and confirming whether the fluorescent layer or the specific wavelength light absorption layer is peeled off. Is easy to determine.

<Embodiment 1>
Hereinafter, a first exemplary embodiment of the anti-counterfeit paper according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 shows a document P1 (printed with a driver's license as an example in the present embodiment) created by printing on a forgery-preventing sheet 1 of the present embodiment. In this embodiment, a personal information description area A surrounded by a black frame is provided on the front side surface of the rectangular anti-counterfeit paper 1. The inside of this area A is divided into several sections, each of which is written with personal information such as name, date of birth, address, etc., or with a photo attached.

The anti-counterfeit paper 1 includes a paper base 2, an adhesion adjustment layer 3 formed on the paper base 2, and a fluorescent layer 4 formed on the adhesion adjustment layer 3.
As the paper base 2, ordinary printing paper can be used, but it is necessary that the paper base 2 does not contain a substance that emits light under ultraviolet light irradiation such as a fluorescent dye.

  The adhesion adjusting layer 3 is formed over almost the entire surface of the paper substrate 2 on which printing is performed (see also FIG. 5). For example, the adhesion adjusting layer 3 can be formed of a resin film containing a silicone resin as an adhesion adjusting agent. Such a resin film can be formed, for example, by applying a resin composition in which an ultraviolet curable silicone resin is blended with an ultraviolet curable medium onto the paper substrate 2 and irradiating and curing the ultraviolet ray. As the medium, a general medium used for printing ink can be used. Moreover, it is preferable that the compounding rate of a silicone resin shall be 1-30 weight% with respect to the weight of the whole composition which forms a resin film, and it is more preferable that it shall be 1-5 weight%. Within this range, the fluorescent layer 4 (details will be described later) overlaid on the adhesion adjusting layer 3 is not peeled off by friction that is normally received in handling the document P1, such as rubbing by hand, etc. It can be adjusted so that it can be easily peeled off when anti-counterfeiting means such as scraping is applied.

  On the adhesion adjusting layer 3, the fluorescent layer 4 is formed over almost the entire surface. The fluorescent layer 4 can be formed by printing, for example, fluorescent ink containing a fluorescent layer material using a printer. The fluorescent substance may be any substance that emits specific fluorescence when irradiated with light in an invisible wavelength region. If the fluorescent layer 4 is configured to be visible when it is irradiated with light in an invisible wavelength region such as ultraviolet rays without including a pigment that is visible under visible light, the document P1 can be used in a normal state. It is possible to prevent the printed content from being visually recognized. In addition, it is possible to prevent the counterfeiter from being aware that the document P1 is provided with a means for determining authenticity, and to prevent the counterfeiting means from becoming more sophisticated and complicated.

  Moreover, although the fluorescent layer 4 is comprised by the small character and the pattern in this embodiment (refer FIG. 2), you may be comprised by fine ground patterns, such as a halftone dot and a mesh. In particular, from the viewpoint of preventing counterfeiting, it is preferable that printing be configured with fine characters and patterns that require a certain level of technology and are difficult to be imitated.

  The creation of the document P1 using the forgery prevention paper 1 is performed by printing information on the surface of the forgery prevention paper 1 on which the adhesion adjusting layer 3 and the fluorescent layer 4 are provided using, for example, a laser printer.

  In order to confirm whether or not the document P1 created in this way has been falsified, the document P1 is irradiated with ultraviolet rays using, for example, a black light L as shown in FIG. If the document P1 is an authentic document that has not been tampered with, it is confirmed that the characters and the design of the fluorescent color appear in a predetermined pattern over the entire printed surface.

  On the other hand, when the tampered document P1 ′ (in this embodiment, the name / address is rewritten and the photograph is rewritten; see FIG. 3) is irradiated with ultraviolet rays, the region A ′ where the tampering has been performed is fluorescent. It is confirmed that the characters and designs disappeared (see FIG. 4). That is, since the adhesion adjusting layer 3 for reducing the adhesion of the fluorescent layer 4 to the paper base 2 is provided between the paper base 2 and the fluorescent layer 4, the document P1 is attempted to be altered. When the printed characters, that is, the toner T fixed on the anti-counterfeit paper 1 is scraped off, the fluorescent layer 4 is also scraped off (see FIG. 6). Therefore, if it is confirmed that the fluorescent layer 4 has been peeled off by irradiating ultraviolet rays, it can be determined that the document P1 'has been forged.

  As described above, in the present embodiment, the adhesion of the fluorescent layer 4 to the paper substrate 2 is reduced due to the presence of the adhesion adjusting layer 3, so that the document P <b> 1 is fixed on the forgery prevention paper 1 in an attempt to tamper. If a part of the character is scraped off, the fluorescent layer 4 is also scraped off. Therefore, the authenticity of the document P1 can be easily confirmed by confirming whether or not the fluorescent layer 4 has been removed by ultraviolet irradiation.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. The forgery prevention paper 11 of the present embodiment is formed on the paper base 12, the adhesion adjustment layer 13 formed on the paper base 12, and the adhesion adjustment layer 13, as in the first embodiment. And a fluorescent layer 14.

  As the paper substrate 12, as in the first embodiment, a printing paper that does not contain a substance that emits light under ultraviolet light irradiation, such as a fluorescent dye, can be used.

  An adhesion adjusting layer 13 is formed on the side of the printing surface on which the paper substrate 12 is printed (see FIG. 8). In the present embodiment, the adhesion adjusting layer 13 is composed of a large number of small symbols. Such an adhesion adjusting layer 13 is formed, for example, by printing a pattern or the like on the paper substrate 12 using an ink in which an ultraviolet curable silicone resin is blended with an ultraviolet curable medium, and irradiating and curing the ultraviolet ray. can do. The adhesion adjusting layer 13 may be composed of a background pattern such as a halftone dot or a mesh. In particular, from the viewpoint of preventing imitation, the adhesion adjusting layer 13 is composed of fine characters that are difficult to be imitated by using a certain technique for printing. It is preferred that

  On the adhesion adjusting layer 13, the fluorescent layer 4 is formed over almost the entire surface. Such a fluorescent layer 4 can be configured by, for example, printing a fluorescent ink containing a fluorescent layer substance using a printer. The composition of the fluorescent layer 14 may be the same as in the first embodiment.

  The creation of the document P2 using the anti-counterfeit paper 11 is performed by printing information on the surface provided with the adhesion adjusting layer 13 and the fluorescent layer 14 on the anti-counterfeit paper 11 using, for example, a laser printer. Is done.

  In order to confirm whether or not the document P2 using the anti-counterfeit paper 11 is falsified, the document P2 is irradiated with ultraviolet rays using, for example, a black light L. If the document P2 is a genuine document that has not been tampered with, it is confirmed that the entire printed surface on which the fluorescent layer 14 has been formed shines in a fluorescent color.

  On the other hand, when the tampered document P2 ′ is irradiated with ultraviolet rays, it is confirmed that a part of the fluorescent color disappears in the tampered area A ′, and a white pattern emerges like a negative image ( (See FIG. 7). That is, since the adhesion adjusting layer 13 for reducing the adhesion of the fluorescent layer 14 to the paper base 12 is provided between the paper base 12 and the fluorescent layer 14, an attempt is made to tamper the document P2. When the printed characters, that is, the toner T fixed on the anti-counterfeit paper 11 is scraped off, the fluorescent layer 14 is also scraped off. Here, in the present embodiment, the adhesion adjusting layer 13 is composed of a large number of small patterns, and the adhesion of the fluorescent layer 14 is reduced because of the pattern of the adhesion adjusting layer 13. Part. Therefore, when the toner T is shaved, only the portion of the phosphor layer 14 formed on the design of the adhesion adjusting layer 13 falls off with the toner T, and the gap portion of the design remains fixed on the paper substrate 12. It is left (see FIG. 9). As a result, a negative image-like pattern corresponding to the pattern of the adhesion adjusting layer 13 appears to appear in the altered region A ′. In such a case, it can be determined that the document P2 'is forged.

  As described above, also in the present embodiment, it is possible to easily confirm the authenticity of the document P2 by confirming whether or not the fluorescent layer 14 is removed by ultraviolet irradiation.

<Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIGS. Similar to the first embodiment, the forgery prevention paper 21 of the present embodiment includes a paper base material 22, an adhesion adjusting layer 23 and a fluorescent layer 24 formed on the paper base material 22. The anti-counterfeit paper 21 of the present embodiment is the same as that of the first embodiment except that the fluorescent layer 24 is formed by solid coating with no design (see FIG. 11). The document P3 using the anti-counterfeit paper 21 is printed on the surface of the anti-counterfeit paper 21 provided with the adhesion adjusting layer 23 and the fluorescent layer 24, for example, using a laser printer, as in the above embodiment. Is done.

  In order to check whether or not the document P3 created using the forgery prevention sheet 21 of the present embodiment has been tampered with, the document P3 is irradiated with ultraviolet rays using, for example, a black light L as shown in FIG. To do. If the document P3 is a genuine document that has not been tampered with, it is confirmed that the entire printed surface on which the fluorescent layer 24 has been formed shines in a fluorescent color.

  On the other hand, when the falsified document P3 'is irradiated with ultraviolet rays, it is confirmed that the fluorescent color disappears in the falsified area A'. That is, since the adhesion adjusting layer 23 for reducing the adhesion of the fluorescent layer 24 to the paper base material 22 is provided between the paper base material 22 and the fluorescent layer 24, an attempt is made to tamper the document P3. When the printed characters, that is, the toner T fixed on the anti-counterfeit paper 21 is scraped off, the fluorescent layer 24 is also scraped off (see FIG. 12). Therefore, if it is confirmed that the fluorescent layer 24 has been peeled off by irradiating ultraviolet rays, it can be determined that the document P3 'has been forged.

  As described above, also in the present embodiment, it is possible to easily confirm the authenticity of the document P3 by confirming whether or not the fluorescent layer 24 is removed by ultraviolet irradiation.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIGS. The anti-counterfeit paper 31 of the present embodiment includes a paper base 32, an adhesion adjustment layer 33 formed on the paper base 32, and a specific wavelength light absorption layer 34 formed on the adhesion adjustment layer 33. It consists of and.
As the paper substrate 32, normal printing paper can be used, but it is necessary to include a substance that emits light under ultraviolet light irradiation, such as a fluorescent dye.

An adhesiveness adjusting layer 33 is formed on the printing surface side on which the printing is performed on the paper base material 32, as in the above-described embodiment. The composition and formation method of the adhesion adjusting layer 33 may be the same as those in the first embodiment.
On the adhesion adjusting layer 33, a specific wavelength light absorbing layer 34 is formed over almost the entire surface. The composition and formation method of the specific wavelength light absorption layer 34 may be the same as those of the fluorescent layer 4 of Embodiment 1 except that an ultraviolet absorber is included instead of the fluorescent substance.

  The document P4 using the anti-counterfeit paper 31 is created using a laser printer, for example, on the surface of the anti-counterfeit paper 31 provided with the adhesion adjusting layer 33 and the specific wavelength light absorbing layer 34, as in the above embodiment. This is done by printing information.

  In order to check whether or not the document P4 created using the forgery prevention paper 31 of the present embodiment has been tampered with, the document P4 is irradiated with ultraviolet rays using, for example, a black light L as shown in FIG. To do. If the document P4 is a genuine document that has not been tampered with, the fluorescent color is not confirmed even when irradiated with ultraviolet rays. This is because the presence of the specific wavelength light absorption layer 34 absorbs the irradiated ultraviolet rays and inhibits the emission of the fluorescent material contained in the paper base material 32.

  On the other hand, when the tampered document P4 'is irradiated with ultraviolet rays, it is confirmed that the tampered area A' is shining in a fluorescent color. That is, since the adhesion adjusting layer 33 for reducing the adhesion of the specific wavelength light absorption layer 34 to the paper substrate 32 is provided between the paper substrate 32 and the specific wavelength light absorption layer 34, the document If the printed character and the toner T fixed on the anti-counterfeit paper 31 are scraped to tamper with P4, the specific wavelength light absorption layer 34 is also scraped off (see FIG. 15). For this reason, the fluorescent color derived from the fluorescent substance contained in the paper base material 32 is confirmed in the region A ′ where the alteration has been performed. Therefore, if it is confirmed that there is a region that emits ultraviolet light when irradiated with ultraviolet rays, it can be determined that the document P4 'is forged.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the silicone resin is used as the adhesion adjusting agent contained in the adhesion adjusting layer. However, the type of the adhesion adjusting agent is not limited to the above embodiment, and for example, paraffin wax is used. You can also.

(2) For example, the fluorescent layer may be composed of fine characters, and colored ink that is visible under visible light may be added. According to such a configuration, since the person who tries to tamper with the anti-counterfeiting technology knows that the anti-counterfeiting paper is applied, an anti-counterfeiting effect can be expected.

(3) In the fourth embodiment, the adhesion adjusting layer or the specific wavelength light absorbing layer may be composed of halftone dots, fine characters, fine patterns, and the like.

(4) The anti-counterfeit paper of the present invention can also employ anti-counterfeit means such as a hologram and DNA ink. As a result, it becomes possible to provide the document with a counterfeit prevention effect.

(5) Documents to which the present invention is applied are not limited to those exemplified in the above embodiment, and include, for example, official documents such as birth certificates, passports, family register copies, resident's cards, contracts, Any document may be used as long as it can be tampered with, such as a document on which confidential company information is written.

(6) The formation region of the adhesion adjusting layer and the fluorescent layer may not be the entire surface of the sheet, and may be formed at least in the region where information to be tampered is described. When information is written on both the front and back sides of the paper, it is preferable that the adhesion adjusting layer and the fluorescent layer are also provided on the front and back sides.

(7) In the above embodiment, an example is shown in which information is printed on a forgery-preventing paper using a laser printer. However, even when information is printed using an inkjet printer, information is written by handwriting, etc. Similar effects are produced.

(8) In each of the above embodiments, an example in which an ultraviolet fluorescent material that emits fluorescence by ultraviolet rays or a specific wavelength absorption layer that absorbs ultraviolet rays is provided has been described. A specific wavelength absorption layer that absorbs light in the infrared region may be provided.

(9) In each of the above embodiments, the paper base 1 is used alone. However, the present invention is not limited to this. For example, a pressure-sensitive adhesive is applied to the surface opposite to the printing surface of the paper base. Further, a so-called tack-seal type structure in which a release paper that can be peeled from the pressure-sensitive adhesive layer is superposed may be adopted. In this way, for example, a hard certificate can be manufactured by stacking a paper base material on a card-type plastic sheet via an adhesive. In addition, the forgery prevention paper having a thickness and a function suitable for various applications can be obtained by being laminated on a thinner plastic film or paper, not only on the plastic sheet.

The perspective view of the document which has not been tampered with in Embodiment 1. The perspective view which shows a mode that an ultraviolet-ray is irradiated to the document which is not tampered in Embodiment 1. The perspective view of the document falsified in Embodiment 1 The perspective view which shows a mode that an ultraviolet-ray is irradiated to the document tampered in Embodiment 1. Sectional view of documents that have not been tampered with in the first embodiment Sectional view of the document falsified in the first embodiment The perspective view which shows a mode that an ultraviolet-ray is irradiated to the document tampered in Embodiment 2. Sectional view of documents that have not been tampered with in the second embodiment Sectional view of the document falsified in the second embodiment The perspective view which shows a mode that an ultraviolet-ray is irradiated to the document falsified in Embodiment 3 Sectional view of documents that have not been tampered with in the third embodiment Sectional view of the document falsified in the third embodiment The perspective view which shows a mode that an ultraviolet-ray is irradiated to the document tampered in Embodiment 4. Sectional view of documents that have not been tampered with in the fourth embodiment Sectional view of the document falsified in the fourth embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11, 21, 31 ... Anti-counterfeit paper 2, 12, 22, 32 ... Paper base material 3, 13, 23, 33 ... Adhesion adjustment layer 4, 14, 24 ... Fluorescent layer 34 ... Specific wavelength light absorption layer

Claims (7)

A paper base, and a fluorescent layer that is arranged on a printing surface side on which printing is performed on the paper base and includes a fluorescent substance that is visible by irradiation with light in an invisible wavelength region that cannot be seen under visible light; and An anti-counterfeit paper provided with an adhesion adjusting layer disposed between a paper substrate and the fluorescent layer to reduce the adhesion of the fluorescent layer to the paper substrate. The forgery-preventing paper according to claim 1, wherein the adhesion adjusting layer or the fluorescent layer is composed of halftone dots or fine characters / patterns. A paper base material containing a fluorescent dye that is visible under irradiation of light in an invisible wavelength region that cannot be seen under visible light, and absorption of light in the invisible wavelength region disposed on the printing surface side on which printing is performed on the paper base material A specific wavelength light absorbing layer containing an agent, and an adhesion adjusting layer disposed between the paper substrate and the specific wavelength light absorbing layer to reduce the adhesion of the specific wavelength light absorbing layer to the paper substrate. And anti-counterfeit paper. The anti-counterfeit paper according to claim 3, wherein the adhesion adjusting layer or the specific wavelength light absorbing layer is composed of halftone dots or fine characters / patterns. The anti-counterfeit paper according to any one of claims 1 to 4, wherein the adhesion adjusting layer contains a silicone resin or paraffin wax. The anti-counterfeit paper according to claim 5, wherein the content of the silicone resin or paraffin wax is 1% by weight or more and 30% by weight or less with respect to the entire composition constituting the adhesion adjusting layer. The pressure sensitive adhesive layer and the release paper laminated | stacked on this pressure sensitive adhesive layer so that peeling was possible on the surface on the opposite side to the said printing surface of the said paper base material are any one of Claims 1-6. Anti-counterfeit paper.

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