TONER FOR ELECTROPHOTOGRAPHY AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the defect of the reproducibility of an image due to the local defect of transfer caused at the time transfer such as the one like a wormhole in image formation using an intermediate transfer system. SOLUTION: As for the toner for electrophotography obtained by externally adding and treating a charge control agent on the surface of the toner, the standard deviation of the concentration of the surface charge control agent between toner particles is <=0.2 and the usage of the charge control agent is <=0.5%.