JP2983035B2 - Verification record and verification method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a recorded matter on which information is recorded with difficulty in visual discrimination or excellent appearance.

(Prior art) Conventionally, cash, credit cards, ID cards, securities, voting tickets, and the like are processed by printing, engraving, embossing, laser, electric discharge, laminating or vapor deposition for collation and prevention of forgery / falsification. Means, a magnetic material, a conductive material,
Various attempts have been made using functional materials such as a photosensitive material, a heat-sensitive material, a foam material, and a light-emitting material, and detection means alone or in combination depending on the function.

Among these functional materials, a method of reading information using a substance that selectively absorbs light of a specific wavelength is already known, and in particular, a method using a near-infrared absorbing material is easy to perform hidden information recording. Various proposals have been made. For example, a method of juxtaposing or laminating two or more kinds of inks having the same color tone having different near-infrared reflectances, or printing after coating with an ink that transmits near-infrared rays (Japanese Patent Laid-Open No. 58-13478).
2) A method of overcoating a near-infrared absorbing ink with a dark color ink (Japanese Patent Application Laid-Open No. 63-144075) has been proposed. In such a printed matter, the hidden pattern can be identified only by near-infrared rays having a specific wavelength, so that the printed matter is less likely to be forged or tampered with and has high security. However, to obtain inks of the same color tone having different transmittances or reflectances of near infrared rays, it is necessary to perform troublesome toning, and to arrange them side by side requires advanced printing technology. Also, since the color tone must be matched to inks with low transmittance or reflectance of near infrared rays, the color of the ink is restricted by pigments that do not transmit and reflect light in the near infrared region, and black, blue,
There is a drawback in that it is limited to cold / dark colors such as green, brown and ocher. Furthermore, a method of printing securities using a thermal transfer ink sheet containing a near-infrared absorbing material (Japanese Unexamined Patent Publication No.
-146589), there is exemplified a printed material which is extremely pale in color and difficult to identify by the naked eye, but has a drawback of poor light fastness.

In addition, it is already known that a recording material having a metallic luster such as gold or silver is read by a detection device that measures the reflection intensity or the transmission absorption intensity of a normal specific light.
A metallic glossy bar code is provided on an outer box of cigarettes or the like. Due to its mirror-reflecting property, the metallic glossy recorded material can be read by the above-described detection device in the same manner as a normal black recorded material. Metallic glossy recordings obtained using metals such as aluminum powders and copper powders have the advantage of being excellent in light resistance, but have the disadvantage that they are not suitable for hidden information recording due to their color.

(Problems to be Solved by the Invention) In view of such a problem, the present invention pays attention to the fact that a material causing specular reflection is excellent in light resistance and can be read by a conventional bar code reader. An object of the present invention is to provide a recorded material that is effective as a means for determination, that can be easily automated for identification, and that is difficult to visually discriminate or has an excellent appearance.

[Configuration of the invention]

(Means for Solving the Problems) That is, according to the present invention, a recording layer for comparison using an ink containing a pearl pigment is provided on a substrate, and a 60-degree mirror glossiness of 40 degrees is provided.
The present invention relates to a recorded material for collation by measuring reflection intensity or transmission absorption intensity of visible or near-infrared light, which is characterized by the above.

The present invention also relates to a collation method characterized by reading information recorded on the recorded matter by measuring a reflection intensity or a transmission absorption intensity of visible or near-infrared light.

The recorded matter can be detected by a device that reads information by measuring the reflection intensity or transmission absorption intensity of visible or near-infrared light, and a production lot number or a production lot number assigned to various products for product management. This is effective for collating part numbers. Also, the figures, patterns, symbols, etc. of the shapes given in accordance with the information cannot be rewritten without destruction, and if white pearl pigments are used, it can be visually difficult to distinguish, so that the forgery is forged. -It is also effective as a means for preventing falsification and discriminating authenticity. Also, if a colored pearl pigment is used, it is possible to obtain a recorded matter having a high-quality appearance and excellent aesthetic appearance.

The pearl pigment of the present invention is a pigment exhibiting an elegant shine called pearl luster due to multiple reflection of light, and is a synthesis of a natural pearl luster pigment collected from fish scales, basic lead carbonate, bismuth oxychloride, mica titanium and the like. Pearlescent pigments can be mentioned. The pigment is made of a transparent, high-refractive-index substance,
It is known that pigment particles are flaky, and when colored, the flakes are arranged in layers. The pearl pigment used in the present invention is required to have a 60-degree specular glossiness of the recorded matter of 40 or more. Since pearl pigments are excellent in light resistance, there is an advantage that it is not particularly necessary to take measures against ultraviolet rays.

The recorded matter of the present invention can be obtained by various printings such as ordinary gravure, flexo, offset, and screen printing, and printing by various printers such as a thermal transfer printer, an ink jet printer, and a laser printer.

As the recording layer for comparison in the present invention, a bar code,
This is a recording layer for end marks, position marks, counter marks, timing marks, etc., and is used to detect cash cards, credit cards, ID cards, securities, voting tickets, business forms, etc., and to check forgery and tampering. belongs to. These recording layers are detected, read, and collated by a near-infrared detector, OCR, or the like.

Hereinafter, the present invention will be described in detail with reference to examples. All parts in the examples represent "parts by weight".

Example 1 A coating liquid having the following composition was sufficiently dispersed at room temperature using an attritor to obtain a base ink and an ink containing pearl pigment.

[Ink for base]

Titanium oxide pigment 12 parts (Ishihara Sangyo Co., Ltd. Taipaque CR-67) Nitrocellulose 7 parts (Asahi Kasei Corporation HIG1 / 2) Polyamide resin 16 parts (Henkel Hakusui Co., Ltd. Versamide 930) di-2-ethylhexyl Phthalate 2 parts (DOP manufactured by Daihachi Chemical Co., Ltd.) Isopropyl alcohol 43 parts Ethyl acetate 12 parts Toluene 8 parts [Ink with pearl pigment] Pearl pigment 12 parts (Iriodin 111 from Merck Japan KK) Nitrocellulose 7 Part (HIG1 / 2 manufactured by Asahi Kasei Corporation) Polyamide resin 16 parts (Bersamide 930 manufactured by Henkel Hakusui Corporation) Di-2-ethylhexyl phthalate 2 parts (DOP manufactured by Daihachi Chemical Industry Co., Ltd.) Isopropyl alcohol 43 parts Acetic acid Ethyl 12 parts Toluene 8 parts Using the obtained base ink, gravure coating was performed on a cellophane film (KM Cell Sea, manufactured by Daicel Corporation). A bar code was printed using a pearl pigment-containing ink after solid printing by a printing method. Although it is difficult to visually confirm the presence of a barcode in the obtained recorded matter, the recorded matter is read with a barcode reader “TCD-4000 & TBR-4000” manufactured by Token Co., Ltd. (using a CCD as a sensor). As a result, it was possible to read information according to the code.

Example 2 A coating liquid having the following formulation was heated to 200 ° C. to dissolve the resin, thereby producing a varnish.

(Rosin-modified phenolic resin varnish)

Rosin-modified phenolic resin 50 parts (Tamanol 356 manufactured by Arakawa Chemical Industry Co., Ltd.) Linseed oil 15 parts Solvent 35 parts (Nippon Petrochemical Co., Ltd. No. 3 solvent) Next, a three-roll mill made of a material having the following composition The mixture was kneaded to obtain an ink containing a pearl pigment.

[Ink with pearl pigment]

Pearl pigment 17 parts (Iriodin 302 manufactured by Merck Japan K.K.) Rosin-modified phenolic resin varnish 68 parts Solvent 15 parts (Nippon Petrochemical Co., Ltd. No. 3 solvent) Using the obtained ink containing pearl pigment, Bar codes were printed on art paper by the offset printing method. The obtained recorded material was gold with a luxurious pearly luster, and was manufactured by Barcode Reader Co., Ltd., “TCD-4000 & TBR-400” manufactured by Token.
With "0", the information corresponding to the code could be read.

Example 3 A coating liquid having the following composition was sufficiently dispersed with an attritor,
The obtained ink for forming a release layer was applied onto a 6 μm-thick polyethylene terephthalate film by a gravure coating method so that the coating thickness when dried became 1.5 μm.

[Ink for forming release layer]

Ethylene-vinyl acetate copolymer 1 part (Evaflex 577 manufactured by Mitsui Polychemicals, Inc.)
-2) Carnauba wax 19 parts (LP-200 manufactured by Noda Wax Co., Ltd.) Toluene 50 parts Methyl isobutyl ketone 30 parts Further, in a 5 liter sand mill filled with 60% by volume of glass beads having an average particle diameter of 0.5 mm. And the following premixed composition was charged by a gear pump at a speed of 2 liters / minute, and a sand mill was rotated at a speed of 10 m / s to perform kneading.
This was repeated twice to obtain a pearl pigment-containing hot-melt ink.
Next, on the above-mentioned peeling layer, it was applied by a gravure coating method to a coating thickness of 5 μm when dried to obtain a thermal transfer material.

[Ink with pearl pigment]

Rice wax 20 parts (Noda Wax Co., Ltd. LP-200) Aqueous acrylic resin 8 parts (Toyo Ink Mfg. Co., Ltd. Riocryl AP-2) Pearl pigment 8 parts (Merck Japan K.K. Iriodin 217) Water 37 Part ethanol 27 parts Using the obtained thermal transfer material, a barcode was printed on a recording paper having a Beck smoothness of 100 seconds by a barcode label printer. The recorded matter obtained is difficult to see visually, but "TCD-4000 &TBR-4000" manufactured by Barcode Reader Co., Ltd.
Could read the information according to the code.

Comparative Example 1 The same ink for forming a release layer as in Example 3 was applied to a 6 μm polyethylene terephthalate film by a gravure coating method so that the coating thickness after drying became 1.5 μm.

Further, the following premixed composition was charged into a 5 liter sand mill filled with 60% by volume of glass beads having an average particle diameter of 0.5 mm by a gear pump at a rate of 2 liters / minute, and the sand mill was fed at a rate of 10 m / s. Rotate with 10 to knead
This was repeated twice to obtain a pearl pigment-containing hot-melt ink.
Next, on the above-mentioned peeling layer, it was applied by a gravure coating method to a coating thickness of 5 μm when dried to obtain a thermal transfer material.

[Ink with pearl pigment]

Rice wax 20 parts (Noda Wax Co., Ltd. LP-200) Aqueous acrylic resin 8 parts (Toyo Ink Mfg. Co., Ltd. Riocryl AP-2) Pearl pigment 8 parts (Merck Japan K.K. Iriodin 235) Water 37 Part ethanol 27 parts Using the obtained thermal transfer material, a barcode was printed on a recording paper having a Beck smoothness of 100 seconds by a barcode label printer. However, in the obtained recorded material, information corresponding to the code could not be read by “TCD-4000 & TBR-4000” manufactured by Barcode Reader Co., Ltd.

Measurement results of 60-degree specular glossiness of the recorded matter of Examples 1 to 3 and Comparative Example 1 by a gloss meter (GM-3M manufactured by Murakami Color Research Laboratory) and a barcode reader (TCD manufactured by Token Co., Ltd.) The following table summarizes the readability with -4000 & TBR-4000).

From the above results, in order to read with a normal barcode reader, it is necessary to use a pearl pigment that makes the 60 ° specular gloss of the recorded matter 40 or more.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the information code excellent in light resistance can be provided by printing using the ink containing a pearl pigment, without impairing the appearance of a product. Specifically, by using a colored pearl pigment to add a luxurious pearly glossy information code that matches the product image, or by printing on a white paper using a white pearl pigment, A hidden code that is difficult to determine can be provided. The latter hidden code is also effective as a means for preventing forgery and tampering. In addition, printed matter containing pearl pigment,
Since detection can be performed by a normal detection device using a CCD as a sensor, identification can be easily automated.

Claims (2)

(57) [Claims] 1. A reflection intensity of visible or near-infrared light, wherein a collation recording layer is provided on a substrate with an ink containing a pearl pigment, and a 60-degree specular gloss is 40 or more. Or a recorded matter for collation by measuring the transmission absorption intensity. 2. A collation method comprising reading information recorded on the recorded matter according to claim 1 by measuring reflection intensity or transmission absorption intensity of visible or near-infrared light.