| abstract |
Toner from a contact portion (cleaning nip portion) between a cleaning blade and an image carrier, which is generated when a low image density image is repeatedly formed in a high temperature and high humidity environment and then a high image density image is formed To provide a toner for developing an electrostatic charge image that suppresses the occurrence of slip-through. Toner particles and first silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation of 60% to 95% Second silica particles having an average circularity of 0.9 or more and 1.0 or less, a particle size distribution index of 1.05 or more and 1.25 or less, and a compression aggregation degree of 60% or more and 95% or less. When the average primary particle diameter of one silica particle is Da (nm) and the average primary particle diameter of the second silica particle is Db (nm), formula (A1): 80 ≦ Da ≦ 120, formula (A2): The electrostatic charge image developing toner satisfies the relationship of 120 ≦ Db ≦ 200 and formula (A3): 10 ≦ Db−Da ≦ 120. [Selection figure] None |