Invisible, machine-detectable security marking

Details Invisible, machine-detectable security marking Invisible, machine-detectable security marking

B - Operations, Transporting

44

F

B44F 1/12 (2006.01) B41M 3/14 (2006.01) G03G 21/04 (2006.01) G06K 19/06 (2006.01)

Patent

CA 2244919

The invention relates to a security marking whose level of proof against forgery is greater than that of known security markings, comprising liquid--crystalline material with chiral phase, wherein the security marking is imperceptible to the eye and the properties of the liquid-crystalline material with chiral phase can be detected with the aid of detection systems.

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