Patent ID: 10234786

Abstract:
The inventive developing roller (1) includes a roller body (2) having an outer peripheral surface (5) which includes a surface roughness component including a multiplicity of asperities and having a void volume Vv of not greater than 0.5 ml/m2, and a surface waviness component including a multiplicity of asperities having a longer periodicity than the surface roughness component and having a void volume Vv of not less than 0.05 ml/m2 and not greater than 3.5 ml/m2, the void volumes Vv being each defined as the sum Vvc+Vvv of a core void volume Vvc and a dale void volume Vvv. The inventive production method includes the steps of: polishing the outer peripheral surface (5); and finishing the polished outer peripheral surface by at least one method selected from the group consisting of a laser processing method, a wet blasting method and a dry blasting method, so that the outer peripheral surface has a surface geometry satisfying the requirements for the void volumes Vv.