Resin coated carrier, two-component developer, developing device and image forming apparatus

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.