B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
B41M 3/14 (2006.01) B41M 5/28 (2006.01) B42D 15/00 (2006.01) B42D 15/10 (2006.01) G03C 5/08 (2006.01) G03G 21/04 (2006.01)
Patent
CA 2276043
The present invention is directed to a security document which includes a photochromic security system. The photochromic security system comprises a photochrome and a sensitizer which causes the photochrome to colorize at a wavelength of electromagnetic radiation emitted by an image processing device. Desirably, the photochromic system of the present invention will undergo a color change and/or a change in optical density from about 300 nm to about 500 nm.
L'invention porte sur un document de sécurité comportant un système de sécurité photochromique, consistant en un photochrome et en un sensibilisateur qui provoque la coloration du photochrome à la longueur d'onde du rayonnement électromagnétique émis par le dispositif de traitement d'image. Le système photochromique de l'invention subira une variation de couleur et/ou une variation de densité optique comprise entre environ 300 nm et environ 500 nm.
Bannard John
Maguire Dennis
Puntambekar Shakher
Gowling Lafleur Henderson Llp
The Standard Register Company
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