Patent ID: 8975011
Filing Date: 2015-03-10
Classification: B32B,B41M,B42D,G03C

Abstract:
1. A multi-layer article comprising: a first, interior, thermally activatable layer, wherein the first thermally activatable layer comprises a first light to heat convertor composition and a first color changing compound, and wherein the light to heat convertor composition absorbs light of a write wavelength and the first activatable layer has a first absorption threshold for activation; a second, interior, thermally activatable layer, wherein the second thermally activatable layer comprises a second light to heat convertor composition and a second color changing compound and wherein the light to heat convertor composition absorbs light of the write wavelength and the second activatable layer has a second absorption threshold for activation, wherein the second absorption threshold is lower than the first absorption threshold; and a first blocking layer disposed between the first and second internal thermally activatable layers, the first blocking layer being adapted to at least partially block but not completely block light of the write wavelength.