Patent ID: 8852719

Claim:
A releasable metalized embossed transfer film comprising (a) a polymeric base layer, (b) an embossing material layer in direct contact with the polymeric base layer and having an embossed surface on a side opposite the polymeric base layer, the embossed surface defining a diffraction grating pattern, and (c) a metal layer in direct contact with the embossing material layer opposite the polymeric base layer, in which the metal layer comprises as a major fraction a metal selected from the group consisting of Al, Au, Ag, Cu, Pt, Ni, Ti, Ta and a mixture thereof, and in which the metal layer has a thickness of about 20-50 nm, and in which the polymeric base layer and embossing material layer have an interfacial joint formed by coating a liquid comprising an embossing material composition onto a surface of the polymeric base layer which surface has a surface energy less than about 60 dynes/cm, and in which the embossing material layer comprises as a major fraction polyurethane having elongation at break in the range of about 450-500% as determined by ASTM method D882-10.