Positively chargeable toner for nonmagnetic one-component developing method

摘要

The positively chargeable toner used for a nonmagnetic one-component developing method includes a toner particle and fine polytetrafluoroethylene particles, the toner particle having (a) a binder resin having a polyester resin having an acid value of 10 mg KOH/g or less; (b) a colorant; and (c) a charge control agent, and the fine polytetrafluoroethylene particles, whose average primary particle size is at least 0.05 mu m and less than 0.5 mu m, being externally added to the surface of the toner particle. The nonmagnetic one-component developing method includes the step of loading the above positively chargeable toner in a developer device for a nonmagnetic one-component toner.