DEVELOPER FOR ELECTROPHOTOGRAPHY AND IMAGE FORMING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To make stably obtainable a high quality image even under mechanical stress by controlling the occurrence of aggregations of a toner and the occurrence of poor transfer of an unfixed toner image. SOLUTION: This developer for electrophotography contains aggregations of a resin particle and toners for electro-photography obtained by adding a fluidizing agent to minute particles containing at least a binder resin and a colorant. The average particle diameter of the aggregations of the resin particle is smaller than the 100 times of the volume average particle diameter of the toners for electrophotography. The primary particle diameter of the resin particle consisting of the aggregation is larger than 30 nm and smaller than one tenth of the volume average particle diameter of the toners for electrophotography.