Development roller and blade used in development device, and development device and image-forming device having the development roller and blade

摘要

It is an exemplified object of the present invention to provide a development device, development roller and blade used in the development device, and development roller and image-forming device having the development roller and blade, which can form a high-quality image by a cost-efficient means. To achieve this object, the inventive development roller comprises a shaft, a base material that coats a periphery of the shaft, and is made of a resistance body, and a layered coating provided on a periphery of the base material, where the layered coating includes two or more layers, a coating layer provided inside an outermost coating layer has a higher charging capability to a developing agent than at least the outermost coating layer.