JP2012071551A - Forgery preventive sheet for toner printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forgery preventive sheet for toner printing that makes it possible to easily and visually identify the presence of forgeries such as a fake copy made by a color copying machine as well as an alteration made by scraping toner-printed information off, and furthermore makes it possible to effectively prevent these forgeries.SOLUTION: A forgery preventive sheet for toner printing includes a lustrous scratch layer 2 formed on one side of a sheet base material 1 such that the surface of the scratch layer 2 serves as a toner printing part. The lustrous scratch layer 2 is formed by screen printing or offset printing with ultraviolet curing silver ink on one side of the sheet base material 1 coated by release varnish.

Description

  The present invention relates to a sheet for toner printing, and more particularly to a forgery prevention sheet for toner printing suitable for application to sheets such as various tickets, gift certificates, stock certificates, etc., which need to be printed with toner and must be prevented from forgery.

  In general, a sheet printed with toner has poor toner fixability, so it is not a difficult task to scrape off the printed portion of the toner without damaging the sheet. Conventionally, in order to improve the fixability of the toner to the sheet, a print image fixing layer is provided on the sheet, and toner is printed on this print image fixing layer. However, a sufficiently satisfactory print image fixing layer has been realized. It has not been.

  For this reason, in the past, the printed part including the amount of various tickets, gift certificates, stock certificates, etc. created by printing toner with predetermined information on the sheet is scraped off, and numbers and letters are newly added to the scraped part. There is a risk that various tickets, gift certificates, stock certificates, etc. will be tampered with. However, it is extremely difficult to visually identify the tampering, and it is not easy even for a skilled person, particularly at a site where quick processing is required.

  Conventionally, it has been proposed to provide an undercoat layer on a printing sheet using a toner having a color density different from that of the printing toner (Patent Document 1). According to this printing sheet, since both the printed information and the undercoat layer are made of toner, the mutual connection is strong, and it is difficult to scrape only the printed information. The layer is also scraped, and the shaved portion becomes lighter or darker, so that the presence or absence of tampering can be identified easily and quickly visually.

JP-A-6-227190

  However, this conventionally proposed printing sheet provided with an undercoat layer of toner can cope with forgery by scraping and altering the printed information part, but in the case of forgery by copying using a color copier, There is no inconvenience that it is difficult to identify counterfeit because there is no color difference between the regular and counterfeit. SUMMARY OF THE INVENTION An object of the present invention is to provide a forgery prevention sheet for toner printing, which can solve this inconvenience and can visually recognize not only forgery by scraping but also forgery by copying.

  In order to achieve this object, the anti-counterfeit sheet for toner printing according to the present invention is provided with a glossy scratch layer on a sheet substrate, and the surface of the scratch layer serves as a toner printing portion. The scratch layer can be provided by printing a scratch ink or hot stamping (foil transfer) a thermal transfer foil such as a scratch foil. The scratch ink is preferably an ultraviolet curable type that does not take time to dry and does not cause blocking, but an oil type can also be used.

  According to the anti-counterfeit sheet for toner printing according to the present invention, when falsification is attempted by cutting and falsifying information printed on the surface of the scratch layer, the scratch layer is also scraped off together with the toner to expose the sheet base material surface. In addition, since it is extremely difficult to restore the scratch layer, it can be easily visually identified that the forgery has been attempted. In addition, if the anti-counterfeit sheet for toner printing according to the present invention is forged by copying with a copying machine, the glossiness of the scratch layer cannot be faithfully copied, so it is visually easy to forge. Can be identified. As described above, according to the anti-counterfeit sheet for toner printing according to the present invention, not only forgery caused by falsification of information but also forgery caused by copying can be easily visually identified, thereby contributing to prevention of forgery. Play.

FIG. 3 is a schematic side view illustrating a state where toner printing is performed on a forgery prevention sheet for toner printing according to a preferred embodiment of the present invention. FIG. FIG. 3 is a schematic plan view showing a state in which a part of a scratch layer is cut off together with toner print information. The schematic top view which shows other embodiment regarding the aspect of a scratch layer.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, a glossy scratch layer 2 is provided on one surface of the sheet substrate 1, and the surface of the scratch layer 2 serves as a toner printing portion on which printing with toner is performed. As shown in FIG. 3, on the surface covered with the scratch layer 2 on one surface of the sheet base material 1 is printed in advance with base information 3 formed by continuously displaying a plurality of four characters “unusable”. Yes.

  The glossy scratch layer 2 is formed, for example, by screen printing or offset printing of an ultraviolet curable silver ink. In the case where the sheet base material 1 is a material that easily absorbs silver ink, it is preferable to perform a coating treatment for forming a release varnish layer on the surface of the sheet base material 1. Further, the scratch layer 2 is formed by hot stamping (foil transfer) a glossy heat transfer foil such as a metallic foil such as gold or silver, a pearl pigment foil, or a hologram foil instead of printing with silver ink. You can also. Even when this thermal transfer foil is used, it is desirable to coat the surface of the sheet substrate 1.

  Formation of the scratch layer 2 with a metallic foil is, for example, using a thermoplastic resin film as a release film, applying a release agent on the release film to form a release layer, and forming a metallic layer on the surface of the release layer. Using the transfer foil provided with the vapor deposition layer, the foil is transferred onto one surface of the sheet base material 1 by heat and pressure.

  In the case of a pearl pigment foil, for example, an average particle diameter of 1 to 150 μm obtained by coating mica particles on a thin plate with a metal oxide such as titanium dioxide, zirconium oxide or iron oxide on pigments or dyes of a desired color such as red or blue. After mixing and diluting a pearl pigment formed by mixing a resin such as styrene / maleic anhydride copolymer as a binder and a general inorganic and / or organic filler as a solvent, a release film The release film is coated onto the transfer foil. Then, using this transfer foil, the foil is transferred to one surface of the sheet base material 1 with heat and pressure to form the scratch layer 2.

  Furthermore, in the case of hologram foil, for example, a release agent is formed on a thermoplastic resin film to form a release layer, and interference fringes are formed on the glossy photosensitive resin layer coated on the surface of the release layer. Is exposed and developed to form a release film having a hologram layer, and this release film is used as a transfer foil. Then, the scratch layer 2 is formed by transferring the foil onto one surface of the sheet substrate 1 with heat and pressure.

  In the above-described embodiment, as shown in FIGS. 1 and 2, the surface of the scratch layer 2 is printed using toner by a printer, that is, toner printing, and toner print information 4a, 4b, 4c, illustrated example Then, A, B, and C are displayed. If the toner print information 4a, 4b, 4c is scraped off with the intention of falsifying a part or all of the toner print information 4a, 4b, 4c, the scratch layer 2 is also scraped together, and the base information 3 is exposed. Since it is extremely difficult to restore the scraped scratch layer 2, even if different information is displayed instead of the scraped toner print information 4a, 4b, 4c, the ground information 3 is exposed and the scratch layer 2 is By not being present, counterfeiting through tampering can be easily identified visually.

  Further, when the background information 3 is not provided, the toner print information 4a, 4b, and 4c are scraped together with all of the scratch layer 2, and the altered information is newly printed on the surface of the exposed sheet base material 1 with toner. Since there is no scratch layer 2 that should be, the forgery can be easily identified visually.

  On the other hand, even if forgery is attempted by copying with a color copying machine, it is extremely difficult to completely reproduce the glossiness of the scratch layer 2, so that the forgery due to the difference in glossiness can be easily identified visually. is there. The scratch layer 2 using a hologram foil is particularly effective for counterfeiting by copying.

  Next, another embodiment relating to the aspect of the scratch layer will be described with reference to FIG. The scratch layer 12 in the present embodiment is provided in an oblique stripe shape, and part of the toner print information 14a, 14b, 14c obtained by toner printing is located on the scratch layer 12, and the other part is a sheet base. It will be located on the material 11. The scratch layer 12 is provided in the form of diagonal stripes, and the base information is not provided. In this embodiment, when the toner print information 14a, 14b, and 14c is scraped, the corresponding scratch layer 12 is also scraped, so that the scratch layer 12 is not in an oblique stripe shape, and the scratch layer 12 is restored to an oblique stripe shape. Since it is extremely difficult to display other information on it, counterfeiting by tampering can be easily identified visually.

  Also in this embodiment, when forgery is attempted by copying with a color copying machine, it is extremely difficult to completely reproduce the glossiness of the scratch layer 12, so that the forgery is easily identified visually. Is possible. The scratch layer 12 using the hologram foil is particularly effective for counterfeiting by copying as in the above embodiment.

  The present invention is not limited to the above-described embodiments. For example, when fine irregularities are formed on the surfaces of the scratch layers 2 and 12, the light reflection state is different from the smooth surface, and is unique. Therefore, the forgery prevention of the toner print information 4a, 4b, 4c, 14a, 14b, and 14c becomes more reliable. Further, the sheet base materials 1 and 11 are configured as labels, a number of labels are formed on a sheet so as to be cut out, and the scratch layers 2 and 12 are formed on each label to prevent forgery for toner printing according to the present invention In this case, the toner printing forgery prevention sheet corresponding to one label can be used by being separated from the sheet and pasted on another mount or the like.

1,11 Sheet base material 2,12 Scratch layer 3 Background information 4a, 4b, 4c, 14a, 14b, 14c Toner printing information

Claims (1)

A forgery prevention sheet for toner printing, wherein a scratch layer having gloss is provided on a sheet base material, and the surface of the scratch layer serves as a toner printing portion.

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