Patent ID: 8679715
Filing Date: 2014-03-25
Classification: G03G

Abstract:
1. An electrostatic image developing toner comprising: a toner mother particle that contains a binder resin and a releasing agent; and an external additive that contains a zinc compound particle and a silica particle, wherein: the zinc compound particle has a number average particle diameter of from about 2.0 μm to about 10.0 μm, the silica particle has a number average particle diameter of from 100 nm to 200 nm, the number of free zinc compound particles in all toner particles is from about 0.2% by number to about 1.0% by number, the free zinc compound particle has an average circularity of about 0.6 or less, the silica particle is obtained by a sol-gel process, and the electrostatic image developing toner contains no charge control agent in the mother particle.