MULTICOLOR IMAGE FORMING METHOD

摘要

PURPOSE:To stably form multicolor images having excellent image quality many times with high developability and transfer rate even at the time of continuously forming the images over a long period of time. CONSTITUTION:The developer of the multicolor image forming method of forming the plural toner images of different colors in an image forming body 1 by repeating a stage for developing the electrostatic latent image on the image forming body 1 by a contactless type reversal development method under a vibrating electric field consists of aspherical toners having 2 to 6mum average grain sizes rt and resin coated carriers. The aspherical toners are added with external additives consisting of inorg. particulates having 0.070 to 0.200mum average grain sizes ra. The conditions expressed by the following equation are satisfied where the pts.wt. of the above-mentioned external additives to be added to 100 pts.wt. toner particles is designated as Va:11<={rt/(10Xra)}XVa<47.