| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner having excellent cleaning property, charge stability, filming property, toner supply property, low-temperature fixability, and applicable to an image formation apparatus having a toner transfer pump with a rotor and a stator that transfer the toner while rubbing with each other.SOLUTION: An electrostatic charge image developing toner includes at least a binder resin, a coloring agent and a release agent, and also includes at least fatty acid metal salt as an external additive. A ratio of complete isolation of the fatty acid metal salt (complete isolation rate) in the toner is 25% or smaller. A weak deposition rate of the fatty acid metal salt obtained from a finite difference between an isolation rate of the fatty acid metal salt when the toner is dispersed in an aqueous medium and receives ultrasonic wave to isolate the external additive, and the complete isolation rate is 20-50%. |
