CARRIER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE, DEVELOPER AND DEVELOPING METHOD

摘要

PROBLEM TO BE SOLVED: To restrain image disturbance due to charging failure so as to stably obtain a high-grade output image over a long period by setting the sphericity of carrier in a specified range. SOLUTION: Carrier is obtained by immobilizing resin particles on the surface of carrier formed by coating the magnetic particle surface with polyolefine, and the sphericity of the carrier is in the range of 1.0-25.0. This constitution improves unstableness of applying electric charges to toner due to bad fluidity in the case of using carrier coated with polyolefine resin so as to obtain carrier by which crush of characters and fog of background part are not caused under high temperature and high humidity environment. Further, it is possible to obtain carrier, a developer and a developing method which can be applied to an image forming method adopting a toner recycle system.