RECOPYING PREVENTIVE TRANSFER PAPER AND ITS MANUFACTURE

摘要

PURPOSE:To form a sharp copy image and to prevent the image from being copied again by insulating metal vapor-deposited layers which is laminated on one surface an insulating base material so as to make the one surface into a specular surface in a specific direction at specific intervals. CONSTITUTION:This paper consists of the film or sheet type insulating base material 10 and metal vapor-deposited layers 20 laminated on one surface of the base material 10 so as to make the one surface into the specular surface. The base material 10 is rectangular in plane vision and uses a transparent film such as a polyester film and a polypropylene film. The metal vapor- deposited layers 20 are separated and insulated at specific intervals in parallel to the respective sides, and the insulation intervals are of specific length. This length is set shorter than the arrangement interval between a transfer device which uses the corona charger of an electrophotographic copying machine and a separating device which uses an AC corona charger. Consequently, the sharp copy image can be formed and prevented from being copied again.