POSITIVELY CHARGEABLE DEVELOPING AGENT FOR STATIC CHARGE IMAGE DEVELOPMENT, AND PROCESS FOR PRODUCTION THEREOF

摘要

Disclosed is a positively chargeable developing agent for static charge image development, which comprises a positively chargeable toner particle and an external additive. In the developing agent, the toner particle is a colored resin particle which comprises an aggregated/fused particle formed from a binding resin microparticle and a coloring microparticle and has a shape factor SF-1 of 115 to 150 and a shape factor SF-2 of 110 to 140, and the external additive comprises a positively chargeable inorganic particle which has been hydrophobized with a compound having an amino group. Also disclosed is a process for production of the developing agent.