| 摘要 |
<p>PURPOSE: To provide the electrophotographic toner composition and the electrophotographic developer and the image forming method by using them each having the following improvements attained in a good balance; improvements in powder characteristics, image transferability, cleaning performance, and the environment dependency of chargeability, and restrainments from occurrences of comets and filming and toner scattering due to improvements of charge exchangeability and chargeability. CONSTITUTION: The electrophotographic toner composition comprises the toner particles containing a colorant and a binder resin and additives comprising fine surface-treated titanium oxide particles, and these particles contain smaller particles having an average particle diameter of 5-25nm and larger particles having an average particle diameter of 25-80nm, a weight ratio of the smaller ones to the larger ones is in the range of 1:2-3:1, and an amount of the smaller ones to be added is 0.6-4.0wt.% of the toner, and the titanium oxide is manufactured by the wet method, and its water-soluble component is <=0.2wt.%.</p> |
