Patent ID: 8354164
Filing Date: 2013-01-15
Classification: G03G,Y10T

Abstract:
1. A developing roll for developing an electrostatic latent image into a toner image, comprising: a core shaft; and a surface layer comprising a semiconductive member on a surface of the core shaft, the semiconductive member comprising an alkali metal salt having the following formula (1) in a surface layer thereof: wherein: M represents a member selected from the group consisting of Na X represents a member selected from the group consisting of Cl Ar represents a member selected from the group consisting of a benzene ring, a naphthalene ring, and a biphenyl ring; n is a numeral equivalent to the anionic valence of X; fine particles having an average particle diameter of from 0.05 to 1.0 μm are fixed on a surface of the developing roll; the fine particles are fine particles of a carbon black; and the carbon black comprises at least one of an alkali metal salt of a carboxylic acid and an alkali metal salt of a sulfonic acid on a surface thereof.