Patent ID: 6723259
Filing Date: 2004-04-20
Classification: B42D,G03H

Abstract:
Process for producing a sheet bearing a hologram, consisting essentially of the steps of, in order:embossing a support foil on one side by means of an embossing tool having holographic structures, providing a sheet comprising at least first and second layers on one side of the embossed support foil, each of said first and second layers being provided by a method selected from the group consisting of extruding, coating or casting said first and second layers, so that corresponding holographic structures are imparted to at least said first layer of the sheet by the support foil, wherein the first and second layers include a crosslinked material and wherein the first layer is a first color and the second layer is a second color, the first color being different from the second color, subjecting each of said first and second layers to electron beam curing, optionally, providing on the sheet one or more adhesive layers, said one or more adhesive layers optionally having a release paper arranged thereon, and removing the support foil, whereby at least one hologram based on said corresponding holographic structure is produced on the sheet.