Tamper-proof, color-shift security feature

Details Tamper-proof, color-shift security feature Tamper-proof, color-shift security feature

B - Operations, Transporting

42

D

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

Patent

CA 2555821

The invention relates to a tamper-proof security feature that comprises at least one electromagnetic wave-reflecting layer (2), one polymer spacer layer (3) and one metal cluster layer (4). The inventive feature is characterized in that one or more of the layers, in addition to their function, fulfill additional security functions in their color-shift set-up.

La présente invention concerne une marque de sécurité infalsifiable comprenant respectivement au moins une couche qui réfléchit les ondes électromagnétiques (2), une couche de séparation polymère (3), et une couche formée d'agglomérats métalliques (4), une ou plusieurs des couches pouvant en plus de sa fonction d'effet de couleur variable selon l'orientation, avoir d'autres fonctions de sécurité.

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