Developer carrier, developing device using the developer carrier, and process cartridge using the developer carrier

摘要

A developer carrier is capable of stably charging a toner over a long term without change in physical surface shape and composition. The developer carrier has at least a substrate and resin coating layer formed on a surface of the substrate. The resin coating layer includes at least graphitized particles (i) with a degree of graphitization p( 002 ) of 0.20 to 0.95 and an indentation hardness HUT [ 68 ] of 15 to 60 or graphitized particles (ii) with a degree of graphitization p( 002 ) of 0.20 to 0.95 and an average circularity SF- 1 of 0.64 or more.