ELECTROSTATIC DEVELOPING TONER

摘要

PROBLEM TO BE SOLVED: To provide an electrostatic developing toner for efficiently inhibiting fogging of an image by setting the ratio (d/D) between the average particle diameter D of a toner and the average particle diameter d of iron oxide particles contained as a colorant in the toner to a prescribed range and setting the ratio (σr/σs) between the residual magnetization σr and the saturation magnetization σs of the iron oxide particles to a prescribed value or below.

SOLUTION: The ratio (d/D) between the average particle diameter D of a toner and the average particle diameter d of iron oxide particles contained as a colorant in the toner is set to a range of 0.01-0.03 and the ratio (σr/σs) between the residual magnetization σr and the saturation magnetization σs of the iron oxide particles is set to ≤0.3.

COPYRIGHT: (C)2004,JPO