Patent ID: 6155168
Filing Date: 2000-12-05
Classification: B41M,B42D

Abstract:
An information recording medium recording personal identifying information such as characters as well as a photo-portrait image for personal identification on the surface of a substrate, comprising:a coloring ink image recording said photo-portrait image made with coloring ink that is visible under visible light, the recording on a portion of the surface of the substrate, andan ultraviolet ink image or an infrared ink image recording a photo-portrait image of the same pattern as that of said coloring ink image, with ultraviolet ink that is colorless and transparent under visible light or infrared ink that is colorless and transparent under visible light, the ultraviolet ink or infrared ink emitting fluorescence by irradiation of ultraviolet rays or infrared rays on a portion of the surface of the substrate other than the recording portion of said coloring ink image.