Security document with reversibly photochromic printing inks

Details Security document with reversibly photochromic printing inks Security document with reversibly photochromic printing inks

1996-06-17

1998-09-15

Yamnitzky, Marie

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428199, 428201, 428206, 428207, 428211, 4283215, 428323, 428327, 428913, 428916, 283 72, 283 85, 283901, 283902, 427197, 427256, 427258, 427288, B42D 1500, B05D 506

Patent

active

058076255

ABSTRACT:
Photochromic printing inks are disclosed which are in particular used for the printing of security documents. Prints are normally nearly colorless and become colored when energy irradiated, such as by ultraviolet light. This photocoloration is reversible. The printing inks contain photochromic compounds which are protected against other ink components. Methods are described to prepare the inks, to print security documents, and to detect counterfeiting.

REFERENCES:
patent: 3597082 (1971-08-01), James et al.
patent: 4012232 (1977-03-01), Uhlmann
patent: 4166043 (1979-08-01), Uhlmann et al.
patent: 4927180 (1990-05-01), Trundle et al.
patent: 4931220 (1990-06-01), Haynes et al.
patent: 5208132 (1993-05-01), Kamada et al.
patent: 5289547 (1994-02-01), Ligas et al.

Affiliated with

Also associated with

Rating

Security document with reversibly photochromic printing inks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Security document with reversibly photochromic printing inks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security document with reversibly photochromic printing inks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-85243