Patent ID: 6361702
Filing Date: 2002-03-26
Classification: B23P,B44B,B44C,C25D,G03H,Y10T

Abstract:
A method for producing a die for use in hot stamping to a substrate and deforming a reflective material so as to provide optically varying effects comprising the steps of:(1) engraving depressions, capable of producing optically varying effects in a reflective material, in a soft deformable metal foil which is secured to a more rigid but deformable substrate so as to form a laminated structure, such that the engraved depressions are retained in the metal foil which is depressed into the deformable substrate, (2) placing the engraved laminated structure in a metal plating bath to form a hard metal coating over the soft deformable metal foil, (3) removing the hard metal coating, having first and second surfaces, and which has mirror images of the engraved depressions formed in a first surface from the deformable metal foil, (4) masking said mirror images of the engraved depression in said first surface of said hard metal coating, (5) applying an acid etching to said first surface of said hard metal coating so as to form deepened depressions between said masked mirror images of the engrave depressions, whereby the first surface of the hard metal coating may be used as a die for hot stamping to a substrate and deforming a reflective material so as to provide optically varying effects.