Two-component positively-chargeable toner, especially for use in high-speed printer, comprises a resin binder, colorant, wax release agent and positively-chargeable silicon dioxide

摘要

A two-component positively-chargeable toner used with a ferrite carrier of saturation magnetization 40-100 Am<2>/kg comprises a binder resin, a colorant, a wax release agent of melting point 50-120 deg C and an external additive which is positively-chargeable silicon dioxide. A two-component positively-chargeable toner used with a ferrite carrier of saturation magnetization 40-100 Am<2>/kg comprises a binder resin, a colorant, a wax release agent of melting point 50-120 deg C and an external additive which is positively-chargeable silicon dioxide (with an error deviation of 0.1 or below against an approximately straight line showing adhesion of silicon to carbon atoms and a silicon dioxide set-free ratio 5% or below).