Authenticity mark, document carrying such mark, and process...

Details Authenticity mark, document carrying such mark, and process... Authenticity mark, document carrying such mark, and process...

G - Physics

09

C

283/24, 352/53.7

G09C 5/00 (2006.01) G02B 5/128 (2006.01) G06K 19/14 (2006.01) G07D 7/20 (2006.01)

Patent

CA 2000405

ABSTRACT Authenticity mark consisting of pattern of randomly divided granules attached to a delimited surface area of a substrate. The granules consist of retroreflective microspheres with a diameter smaller than 500 micron and that the number of microspheres is selected such that between 20% and 80% of the available surface of said delimited area is covered by said microspheres.

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