Identification matter

Details Identification matter Identification matter

B - Operations, Transporting

42

D

283/26

B42D 15/00 (2006.01) B42D 15/10 (2006.01)

Patent

CA 1108666

ABSTRACT A credential, such as a passport or an identification card, is provided, for example by impregnation or coating, with a phosphorescent composition which includes at least two phosphorescence activators which exhibit different emission characteristics both with respect to wavelength and lifetime so that, when the composition is irradiated, the initial afterglow changes colour, for example from green to blue.

319823

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