DEVELOPING ROLL, ITS MANUFACTURING METHOD, DEVELOPING DEVICE, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a developing roll where unevenness in an image can be reduced and a its manufacturing method. SOLUTION: The local variation quantity of magnetic flux density in the normal direction in the axial direction of a magnetic block 20 which is a developing pole where (peak magnetic flux density - bottom magnetic flux density: T)×(distance between peak value and bottom value: m) is made to be <=3×10<-5> (T.m).