Title:
VALUABLE PRINTED MATTER WITH FORGERY AND FALSIFICATION PREVENTING FUNCTION AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3404519
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To give extremely effective forgery preventing, falsification preventing and copy preventing functions to a valuable printed matter such as a paper money, a passport, securities, stamp or the like by a simple means.
SOLUTION: A printing surface of a passport book 1 of one example of a valuable printed matter is protected by a laminated film. Grooves 9 are formed on a partial or entire area of the film by a laser beam and thermal influence is given to printing 5 included on the area. When an ultraviolet ray is emitted to the printing 5, it is colored with a light having a wavelength except an ultraviolet band region, thereby deciding its truth or a falsehood.
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Inventors:
Satoshi Nishiyama
Masaharu Koyama
Kenichi Kimura
Masaharu Koyama
Kenichi Kimura
Application Number:
JP27069298A
Publication Date:
May 12, 2003
Filing Date:
September 25, 1998
Export Citation:
Assignee:
Ministry of Finance Printing Director
International Classes:
B42D15/10; B41M3/10; B41M3/14; G07D7/00; G07D7/12; (IPC1-7): B42D15/10; B41M3/10; B41M3/14; G07D7/12
Domestic Patent References:
| JP2184497A | ||||
| JP577592A | ||||
| JP9175067A | ||||
| JP648082A | ||||
| JP1025697A | ||||
| JP1177749U | ||||
| JP2000501036A |
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