Patent ID: 7939124
Filing Date: 2011-05-10
Classification: B41M,B42D

Abstract:
1. A method for producing an information carrier comprising the steps of: (1) providing an information carrier precursor comprising a rigid sheet or support; a receiving layer configuration having an image-receiving side and a non-image-receiving side, said receiving layer configuration comprising at least one pigment and at least one binder, wherein at least one constituent layer of said receiving layer configuration is opaque; at least the outermost layer on the image-receiving side or a layer in diffusive contact with the outermost layer on the image-receiving side is opaque and porous; and said receiving layer configuration is capable of being rendered substantially transparent by penetration by a lacquer; and a layer or element, or pattern in said layer or element, capable of a machine-readable change upon absorbing UV, visible or IR radiation, said layer or element being either the surface of said rigid sheet or support or interposed between said rigid sheet or support and the non-image-receiving side of said receiving layer configuration; (2) pattern-wise or integrally at least partially transparentizing the receiving layer configuration with a vaporizable liquid thereby providing a transparent pattern on said at least partially transparentized receiving layer; (3) using a light source to write a pattern or modify said pattern in the layer or element capable of a machine-readable change upon absorption of UV, visible or IR radiation after transmission through at least part of the transparentized areas of the receiving layer configuration; evaporating said vaporizable liquid; and after said vaporizable liquid has been evaporated pattern-wise or integrally rendering said receiving layer configuration permanently at least partially non-transparent with a non-transparentizing lacquer, thereby producing an information carrier, wherein the refractive index of the pigment and the refractive index of the non-transparentizing lacquer differ by greater than 0.12.