Developing roller, electrophotographic process cartridge, and electrophotographic image forming apparatus

摘要

In a developing roller having a shaft member, a conductive elastic layer provided on the shaft member, and a conductive resin layer constituting a most-surface layer, the conductive resin layer contains a condensed polycyclic organic pigment as exemplified by at least one selected from the group consisting of a quinacridone pigment, a threne pigment, a perylene pigment and a perinone pigment. The developing roller can effectively keep ghosts from occurring and can achieve high image density in a low-temperature and low-humidity environment.