Information recording medium and production process thereof

An information recording medium comprising a transparent substrate, an optical recording layer, a protective layer and a print-receiving layer in that order, wherein the print-receiving layer is provided with a forgery-preventing layer which is arranged in such a manner that an outer surface of the forgery-preventing layer and an outer surface of the print-receiving layer are substantially on a same plane, and the forgery-preventing layer has a surface visually distinguishable from the print-receiving layer and a thickness of 0.1 to 1 .mu.m.

An information recording medium comprising a substrate provided with an IC chip, wherein the substrate is provided, on at least one side thereof, with a print-receiving layer which is provided with a forgery-preventing layer having an outer surface visually distinguishable from the print-receiving layer and a thickness of 0.1 to 1 .mu.m, and the forgery-preventing layer is arranged in such a manner that an outer surface of the forgery-preventing layer and an outer surface of the print-receiving layer are substantially on a same plane.

An information recording medium comprising a card substrate and a print-receiving layer provided on the surface thereof, wherein the print-receiving layer is provided with a forgery-preventing layer at a part of an outer surface of said print-receiving layer, wherein the forgery-preventing layer (i) has a printable outer surface and (ii) is embedded in the print receiving layer, and wherein the thickness of the forgery-preventing layer is 0.1 to 1 .mu.m.

An information recording medium comprising a card substrate and a print-receiving layer provided on the surface thereof, wherein the print-receiving layer is provided with a forgery-preventing layer at a part of an outer surface of said print-receiving layer, wherein the forgery-preventing layer (1) has a printable outer surface and (ii) is embedded in the print-receiving layer, and wherein the forgery-preventing layer is comprised of a cured product of an ultraviolet curing resin containing a pigment.

An information recording medium comprising a substrate, optical recording layer, a protective layer and a print-receiving layer, the optical recording layer and the protective layer being between the substrate and the print receiving layer, wherein the print-receiving layer is provided with a forgery-preventing layer at a part of an outer surface of said print-receiving layer, wherein the forgery-preventing layer (i) has a printable outer surface and (ii) is embedded in the print-receiving layer, and the forgery-preventing layer is arranged in such a manner that the outer surface of the forgery-preventing layer and the outer surface of the print-receiving layer are substantially on a same plane, and wherein the outer surface of the forgery-preventing layer is visually distinguishable from the outer surface of the print-receiving layer and a thickness of the forgery-preventing layer is 0.1-1 .mu.m.

A process for applying visible information to an information recording medium comprising an optical recording layer, which comprises the steps of:

• i) providing an information recording medium comprising a transparent substrate, an optical recording layer, a protective layer and a print-receiving layer in that order, wherein the print-receiving layer is provided with a forgery-preventing layer having an outer surface visually distinguishable from the print-receiving layer and a thickness of 0.1 to 1 .mu.m, and the forgery-preventing layer is arranged in such a manner that an outer surface of the forgery-preventing layer and an outer surface of the print-receiving layer are substantially on a same plane;
• and
• ii) applying the visible information so as to extend over both the outer surface of the print-receiving layer and the outer surface of the forgery-preventing layer.