Toner, method for forming image using the toner, and process cartridge

摘要

A toner exhibits excellent image characteristics, and also has an excellent charging property even if the toner is used in a cleaning-simultaneous-with-developing system having a direct injection charging mechanism. The toner includes toner particles and non-magnetic metallic-compound fine particles. The weight average particle diameter of the toner is 3.0 mum to 12.0 mum. The metallic-compound fine particles are conductive metallic-compound fine particles having a specific surface area (cm²/cm³) of 5x10⁵ to 100x10⁵; a medium diameter (D₅₀) of 0.4 mum to 4.0 mum with respect to a volume-based particle diameter distribution, the medium diameter (D₅₀) being smaller than the weight average particle diameter of the toner; and a 90% particle diameter D₉₀ of 6.0 mum or less with respect to a volume-based particle diameter.