Document with doped optical safety mark, stratified...

Details Document with doped optical safety mark, stratified... Document with doped optical safety mark, stratified...

B - Operations, Transporting

42

D

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

Patent

CA 2149550

A document, for example a bank note, a cheque, a credit card, an identification document or a ticket, bears an optical safety mark in the form of a light-reflecting and light-diffracting and/or refracting layer, for example a hologram, an interference layer, a (computer-generated) refracting structure, located on at least parts of the document. The optical safety mark is arranged in a sandwich structure which is fixed to the document by means of an adhesive layer and if required has one or several transparent layers arranged in the sandwich structure. The adhesive layer (7, 12, 12') and/or transparent layer (6, 13, 13') in the sandwich structure (4) is doped with at least one luminescent substance.

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