Security mark, authenticationg method therefor, authentication device and manufacturing method as well as security mark ink and manufacturing method therefor

A safety mark and authentication method technology, applied in the field of safety mark ink and its manufacture, can solve the problems of unrecorded photochromic properties, inability to visually identify safety marks, etc., and achieve high safety performance

Active Publication Date: 2016-10-26
JAPAN SCI & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding this security ink, when ultraviolet light or the like is irradiated with respect to the security ink layer formed by coating or printing, the photochromic compound will be colored, and the security marks such as characters and graphics that are coated or printed will change. It can be recognized visually. ...

Method used

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  • Security mark, authenticationg method therefor, authentication device and manufacturing method as well as security mark ink and manufacturing method therefor
  • Security mark, authenticationg method therefor, authentication device and manufacturing method as well as security mark ink and manufacturing method therefor
  • Security mark, authenticationg method therefor, authentication device and manufacturing method as well as security mark ink and manufacturing method therefor

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Embodiment Construction

[0068] Hereinafter, preferred modes for implementing the present invention will be described with reference to the drawings. In addition, the embodiment described below represents an example of typical embodiment of the present invention, and the scope of the present invention should not be interpreted narrowly thereby.

[0069] 1. Security mark authentication method

[0070] The security mark authentication method according to the present invention includes the following steps.

[0071] (1) A step of irradiating an excitation light to a security mark including a photochromic compound (irradiation step).

[0072] (2) A step of obtaining first security information about changes over time in the absorption spectrum and / or reflection spectrum of the security mark after excitation light irradiation (first information obtaining step).

[0073] (3) A process of collating the obtained first security information with first security information obtained in advance about the security ...

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Abstract

As a technique capable of achieving higher security performance in methods for authenticating security marks that use a photochromic compound, provided is an authentication method that comprises: a process for irradiating excitation light on a security mark containing a photochromic compound; a process for acquiring first security information relating to temporal changes of the absorption spectrum and/or the reflection spectrum of the security mark after irradiation of the excitation light; and a process for comparing the acquired first security information with previously acquired first security information on said security mark. In said authentication method, the security mark preferably contains two or more photochromic compounds for which the coloring and/or the rate of decoloring after coloring as a result of a photochromic reaction differ.

Description

technical field [0001] The present invention relates to a security mark and an authentication method thereof, an authentication device and a manufacturing method, and an ink for a security mark and a manufacturing method thereof. More specifically, it relates to an authentication method of a security mark using a photochromic compound, and the like. Background technique [0002] As photochromic compounds exhibiting photochromic properties, there are known diarylethene-based (Patent Document 1), spiropyran-based (Patent Document 2), hexaarylbiimidazole-based (Non-Patent Document 1) and even A compound of nitrobenzene series (Non-Patent Document 2). The so-called "photochromism" is also known as "photochromism", "photochromy", "photointerchange (photoreversible discoloration: phototropy)", which refers to the state of a certain substance in solid or solution A phenomenon in which the color changes when exposed to light of a specific wavelength (ultraviolet or visible light),...

Claims

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Application Information

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IPC IPC(8): B42D25/378C09D11/50C09K9/02
Inventor 阿部二朗小林洋一
Owner JAPAN SCI & TECH CORP
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