Patent ID: 8678442
Filing Date: 2014-03-25
Classification: B42D,Y10T

Abstract:
1. An anti-forgery security feature comprising: at least one layer that reflects electromagnetic waves; a polymeric spacer layer; and a layer formed of metallic clusters formed on the polymeric spacer layer, wherein one or more of the at least one layer that reflects electromagnetic waves, the polymeric spacer layer, and the layer formed of metallic clusters fulfills, in addition to their function in a color-tilting effect setup, security functions which are measurable in a fluorescent and/or electrically conductive and/or magnetic and/or forensic manner, each of the metallic clusters on the polymeric spacer layer that make up the layer formed of metallic clusters is a discrete cluster that is free from contact with any other of the metallic clusters on the polymeric spacer layer, and at least one of the metallic clusters of the layer formed of metallic clusters is made of a metal that is different from a metal of which at least one other of the metallic clusters of the layer formed of metallic clusters is made.