ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND METHOD OF PRODUCING THAT TONER

摘要

PROBLEM TO BE SOLVED: To provide an electrostatic change image developing toner with when an image of high picture quality can be obtained with little contamination on the base. SOLUTION: The toner essentially comprises a binder resin, a coloring agent and an electrification controlling agent and has 6.0 to 11.5μm weight average particle size. The toner shows the following property. (1) When toner particles having <=5.04μm particle size are included by 15 to 60% in number, the ratio C1/CT of the weight proportion (C1) of the electrification controlling agent in the toner having 4.0 to 4.5μm number average particle size to the weight proportion CT of the electrification controlling agent in the whole toner ranges 1.00 to 1.10. (2) Or, when toner particles having <=5.04μm particle size are included by <=15% in number, the ratio C2/C1 of the weight proportion (C2) of the electrification controlling agent in the toner having 4.2 to 4.8μm number average particle size to CT ranges 1.02 to 1.15.