| 摘要 |
PROBLEM TO BE SOLVED: To provide a two component developer which has good fluidity even by small quantity of an additive agent, has substantially little photoreceptor contamination and filming and has excellent fixation and to obtain an image forming method by which less degradation of the developer and less wear of the photoreceptor are attained even in copying of high-speed and of large amount and in long period using and cleaning failure and filming can be prevented. SOLUTION: Toner is composed at least of a binding resin and a colorant, contains 1 to 15 number % of toner particles of <=5 μm and <=5 wt.% of toner particles having diameter of above twice weight average grain size, relation between D25 and D75 satisfies: 0.60<=D25/D75<=0.85, wherein D25 is number average particle size at 25% accumulated number distribution and D75 is number average particle size at 75% accumulated number distribution, and further weight average grain size is 6.0 to 11.5 μm. |
