Title:
INK HAVING FUNCTION OF PREVENTING FALSIFICATION AND COPYING AND FORGERY PREVENTION PRINT USING THE SAME
Document Type and Number:
Japanese Patent JP2015048413
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a falsification/copying prevention print which prevents both a falsification action of deleting private information formed in the print by using an organic solvent and reusing and a forgery action of copying the print by using digital equipment, e.g. a color copying machine.SOLUTION: An ink having a function of preventing falsification and copying has such a metameric function that a printing region using a first ink and a printing region using a second ink are observed to be the same in color when the printing regions using the first and second inks recognized visually to be different in color under visible light are brought into contact with an organic solvent and are observed to be different in color when the printing regions after contact with the organic solvent are recognized visually under a specified light source or through a specified light source transmissive filter. A print formed by using the ink is also provided.
Inventors:
TANABE SHIGEYUKI
YOSHIDA RYOSUKE
SUGIYAMA HIROYUKI
YOSHIDA RYOSUKE
SUGIYAMA HIROYUKI
Application Number:
JP2013181051A
Publication Date:
March 16, 2015
Filing Date:
September 02, 2013
Export Citation:
Assignee:
NAT PRINTING BUREAU
International Classes:
C09D11/02; B41M3/14; B42D25/30; B42D25/378; G09F3/00
Domestic Patent References:
| JP2009149788A | 2009-07-09 | |||
| JP2008188974A | 2008-08-21 | |||
| JPH11510548A | 1999-09-14 | |||
| JP2009149789A | 2009-07-09 | |||
| JPS54159004A | 1979-12-15 | |||
| JP2011074102A | 2011-04-14 | |||
| JPH10264496A | 1998-10-06 | |||
| JP2007291239A | 2007-11-08 |
Foreign References:
| WO1997041181A1 | 1997-11-06 |