Patent ID: 6358442
Filing Date: 2002-03-19
Classification: B29C,B29D,B29L,B44C,G03H

Abstract:
A method of producing on a substrate surface any of predetermined multi-color diffraction-refraction effects, patterns and holograms, that comprises, applying between a flexible thin thermoplastic film master of predetermined thickness provided with an embossed predetermined diffraction pattern formed of fine lines and a substrate surface, a radiation-curable adhesive coating material being such that, when radiation cured, will integrally bond to the substrate surface, but not to the material of the thermoplastic film master; pressing the film master and substrate together with the coating interposed to cause the surface of the coating adjacent the film master to become impressed with a faithful reproduction of the predetermined fine line diffraction pattern of the film master; passing the pressed together thermoplastic film master and substrate under a radiation curing station to radiation-cure the adhesive coating to set the impressed diffraction pattern in said coating surface upon the radiation-curing of the coating, while integrally bonding the coating to the substrate surface; and stripping the resulting integral diffraction-patterned coated substrate from the flexible thin thermoplastic film master.