Patent ID: 8409778

Claim:
A resin coated carrier which is used together with a toner comprising toner particles and an external additive having an average primary particle size of 50 nm or more externally added thereto, comprising: a carrier core; and a resin coating layer comprising a resin comprising at least two of silicone resins having different weight average molecular weight, formed on a surface of the carrier core, the resin coating layer satisfying the following formula (1): log( Mb/Ma )>2 (1) in which Ma is a weight average molecular weight of a silicone resin having the minimum weight average molecular weight out of the at least two of silicone resins, and Mb is a weight average molecular weight of a silicone resin having the maximum weight average molecular weight out of the at least two of silicone resins contained in the resin coating layer, and the following formula (2) being satisfied: 0.5≦−log( A/B )≦2.5 (2) in which A is a volume resistance (Ω/cm) under electric field of 1,000 V/cm obtained by conducting a stirring test, and B is a volume resistance (Ω/cm) under electric field of 1,000 V/cm before the stirring test.