Patent ID: 7463855

Claim:
A color image forming apparatus that has a plurality of image carrying bodies and forms a color image, comprising: first image forming means for forming toner images of chromatic colors other than black with a first laser exposure; primary transfer means for transferring the toner images, which are formed by the first image forming means, to an intermediate transfer member; secondary transfer means for transferring the toner images, which are transferred to the intermediate transfer member by the primary transfer means, to a transfer medium; second image forming means for forming a black toner image with a second laser exposure, wherein a sphericity of the black toner for forming the black toner image is at most 1.2; direct transfer means for directly transferring the black toner image, which is formed by the second image forming means, to the transfer medium on which the toner images are transferred by the secondary transfer means; and control means for controlling a voltage supplied to at least one of the secondary transfer means and the direct transfer means, when at least one of a conveyance error and a feed error occurs, thereby removing the toner on the intermediate transfer member and/or the toner on a transfer medium convey member by a cleaning device.