JPS5734565A - Partly colored 2-color electrophotographing method - Google Patents

Abstract

PURPOSE:To easily carry out 2-color copying, by laminating 2 photoconductive layers, one of them convertible into conduction by a specified A color light, charging them to polarities different from each other, paiting out the desired black part of a black-and-white original with an ink transmitting the A color light, and exposing them. CONSTITUTION:In the example case of an A color light being red, a photoreceptor 1 is formed by laminating a layer 1B convertible into conduction by a red light, and a layer 1C convertible into conduction by a white light in order on a conductive substrate 1A. The receptor 1 is uniformly exposed to a red light LR, negatively charged with a corona charger 2, and positively charged with a charger 3 to charge the photoconductive layers 1B, 1C oppositely to each other in polarity. A black image OBL2 of the black images OBL1, OBL2 of an original Or is painted out with a red ink IN. The receptor 1 is exposed to a light reflected by the original Or using a while light, and developed in order with a negatively charged toner and a positively charged toner on the parts corresponding to the black image OBL1 of the original Or and that OBL2 painted out, thus a black-and-white 2-color image to be obtained, and a 2-color copy Cop consisting of a black part IBL, and a red part IR by transferring the developed image.