Positively-chargeable toner for developing electrostatic image

Abstract

A positively-chargeable toner for developing electrostatic images which can prevent damage of photosensitive members and filming due to an external additive, can impart a stable charge property and flowability to toner particles over time, and thus hardly causes deterioration of image quality due to fog, blur, white streaks or the like, and therefore is excellent in printing durability even if continuous printing of plural prints is performed is provided. A positively-chargeable toner for developing electrostatic images of the present invention is a positively-chargeable toner for developing electrostatic images comprising colored resin particles containing a colorant and a binder resin, and an external additive, wherein the external additive contains magnesium silicate having negatively charging ability, with a Mohs hardness of 3 or less and a number average primary particle diameter in the range from 1 to 15 μm.

Dependencies are inferred from the claim text.