Patent ID: 8877419
Filing Date: 2014-11-04
Classification: G03G

Abstract:
1. A method of forming a composite color image, comprising: electrically charging a latent image-holding member; exposing the charged latent image-holding member to light to form an electrostatic latent image; developing the electrostatic latent image with a two-component developer containing toner particles of one color and a carrier to form a toner image on the latent image-holding member; primarily transferring the toner image from the latent image-holding member to an intermediate transfer member; repeating the electrically charging, the exposing, the developing, and the primarily transferring, while the toner particles are replaced with toner particles of different color, to form a composite color image on the intermediate transfer member; and secondarily transferring the composite color image from the intermediate transfer member to a recording medium, wherein the carrier comprises: the carrier has a degree of circularity of 0.970 or more, the intermediate transfer member is a belt that has a substrate whose Young's modulus is in the range of from 3,000 to 6,500 MPa, during the primary transferring, primary transfer nip pressure is in the range of from 8 to 20 gf/cm, and a value (T/P) obtained by dividing a primary transfer current value T by a processing speed P is in the range of from 0.08 to 0.18 μA.sec/mm, and the processing speed P is 165 mm/sec or more.