Title:
SHEET FOR PREVENTING FORGERY
Document Type and Number:
Japanese Patent JP3876013
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable determination of authenticity by making confidential information emit fluorescence by black light, although the confidential information can not recognized visually under visible light, and also to enable determination of the authenticity by a simple method without using ultraviolet irradiation equipment.
SOLUTION: A sheet for preventing forgery which has confidential information such as a character, a numeral, a figure, a sign or a pattern having transparency under visible light and formed of a transparent ink film emitting fluorescence under ultraviolet irradiation and of which the transparent ink film contains microcapsules of leuco dye crystal violet lactone.
Inventors:
Hisano Higurashi
Application Number:
JP33591495A
Publication Date:
January 31, 2007
Filing Date:
November 30, 1995
Export Citation:
Assignee:
Toppan Forms Co., Ltd.
International Classes:
B42D15/10; B41M3/14; B41M5/124; G03G21/04; (IPC1-7): B42D15/10; B42D15/10; B42D15/10; B41M3/14; B41M5/124; G03G21/04
Domestic Patent References:
| JP7089283A | ||||
| JP6171269A | ||||
| JP3231394A |
Foreign References:
| WO1994027829A1 |
Attorney, Agent or Firm:
Teruo Akimoto