Title:
PRINTED MATTER HAVING ALTERATION PREVENTING FUNCTION
Document Type and Number:
Japanese Patent JP2016022628
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a printed matter having alteration preventing function that prevents the alteration action of shaving off patterns printed by laser marking, enables manufacture with no need of positioning for the preparation of printed patterns for sensing alteration, and makes no restriction in product form.SOLUTION: A printed matter comprising a laser color development layer configured by coating at least a part of the substrate with a coloring agent that develops color by laser irradiation is a printed matter having alteration preventing function for sensing an alteration trace by making the color development layer that coats the substrate have regions with different positions of center of gravity in a vertical direction to the substrate of the coloring agent and form patterns by laser irradiation across regions with different centers of gravity.SELECTED DRAWING: Figure 1
Inventors:
KOBAYASHI KOJI
FURUYA MAKOTO
FURUYA MAKOTO
Application Number:
JP2014147253A
Publication Date:
February 08, 2016
Filing Date:
July 18, 2014
Export Citation:
Assignee:
NAT PRINTING BUREAU
International Classes:
B42D25/36; B23K26/00; B42D25/41; G07D7/20
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