JPS6252297B

PURPOSE:To make it unnecessary to repeat the same process again, by subjecting a photoreceptor surface to a primary charging, a primary light information exposure, reverse polarity charging, a secondary light information exposure, etc. in succession to conduct developing process. CONSTITUTION:The surface of photoreceptor 1 is uniformly charged with a primary charger 2, and destaticized with AC corona discharger 3 with being irradiated by the first information light alpha. Then, it is exposed to the second information light and the electrostatic latent image of information beta is first developed red. The surface of receptor 1 is uniformly exposed with lamp 12, and the area corresponding information alpha is developed black to form a red and black 2-color image on receptor 1. Before transfer, the surface of receptor 1 is uniformly charged with negative corona discharger 6, then subjected to positive corona discharge from the backside of transfer paper P with transfer charger 7 to transfer a red, black 2-color visible image to paper P, and this image is fixed with fixing unit 8 by heating.