TAMPER-PROOF COLOR-SHIFT SECURITY FEATURE, FILM MATERIAL FOR MANUFACTURING SECURITY FEATURE AND METHOD OF MANUFACTURE AND VERIFICATION OF SECURITY FEATURE

摘要

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.