Patent ID: 8158322
Filing Date: 2012-04-17
Classification: G03G

Abstract:
1. A method of producing a toner, comprising mixing colored resin particles and an external additive with a high speed stirrer, wherein the external additive includes silica fine particles (A) having a Dv50/Dv10 of 1.8 or more, in which Dv10 and Dv50 represent particle diameters at which cumulative volumes reach 10% and 50%, respectively, when counted from the smaller particle diameter side, a volume average particle diameter of 0.1 to 1.0 μm, and a sphericity of 1 to 1.3, and silica fine particles (B) having a volume average particle diameter of 7 to 30 nm; the amount of the silica fine particles (A) is 0.3 to 5 parts by weight based on 100 parts by weight of the colored resin particles; the amount of the silica fine particles (B) is 0.1 to 3 parts by weight based on 100 parts by weight of the colored resin particles; and wherein the silica fine particle (A) is nonconductive.