Developing apparatus, apparatus unit, and image forming method

摘要

A developing apparatus is disclosed which has a developer container, a developer carrying member for carrying a positively chargeable developer held in the developer container and transporting the developer to a developing zone, and a developer layer-thickness regulating member for regulating the thickness of a developer layer formed on the developer carrying member. The developer carrying member has a resin coat layer formed of a resin composition containing at least a resin selected from the group consisting of a phenol resin and a polyamide resin, a conductive material and a quaternary ammonium salt compound which is positively chargeable to iron powder. The resin composition may contain a urethane resin in place of the phenol resin and polyamide resin.