Patent ID: 8455168
Filing Date: 2013-06-04
Classification: G03G

Abstract:
1. An electrophotographic developer comprising: a toner that includes toner base particles and an external additive attached to a surface of the toner base particles, an amount of Al on the surface of the toner base particles being from about 0.002 atm % to about 0.02 atm %; and a carrier that includes magnetic particles and a coating resin layer that coats the magnetic particles, the coating resin layer including organic particles with a volume-average particle diameter of from about 80 nm to about 800 nm or inorganic particles having an organic layer on a surface of the inorganic particles with a volume-average particle diameter of from about 80 nm to about 800 nm, the carrier satisfying one of the following formulas, SP1 representing a solubility parameter of a resin of the coating resin layer, SP2 representing a solubility parameter of the organic particles, and SP3 representing a solubility parameter of the organic layer: wherein the resin of the coating resin layer of the carrier includes at least one selected from the group consisting of fluorine resins and polycarbonates; the organic particles include at least one selected from the group consisting of polytetrafluoroethylene and melamine resins; and the organic layer includes at least one selected from the group consisting of trimethanol amine, triethanol amine, and silylation agents; wherein the coating resin layer of the carrier comprises the inorganic particles having an organic layer on a surface of the inorganic particles and wherein the organic layer includes triethanol amine.