DEVELOPING ROLL AND DEVELOPING DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a developing roll where a good image can be obtained over a long period of time by making reproducibility of dots good by stabilizing a nip width. SOLUTION: In the developing roll 1 visualizing an electrostatic latent image by carrying toner and feeding the toner to the surface of a photoreceptor drum by being brought into contact with or brought to the vicinity of the photoreceptor drum where the above mentioned electrostatic latent image is formed while rotating, a relationship of B<=0.9A+13 is satisfied, wherein the hardness of elastic layer 12 of the developing roll is A and hardness after forming the surface layer 13 on the elastic layer 12 is B.