Developer, developer cartridge, and image forming apparatus

摘要

In order to control the filming, a developer comprises developer primary particles, each comprising at least a resin and a colorant and an additive agent added to the developer primary particles and having a particle diameter smaller than that of the developer primary particles, wherein an extrication amount of the additive agent in the developer primary particles is smaller than 5.2x10^-5 part by weight with respect to the developer primary particles.