| 摘要 |
PURPOSE:To prevent the generation of fogging by a reverse polarity toner by sticking fine silica powder and titania particles having respectively specific grain size onto the surface of toner particles. CONSTITUTION:The fine silica powder and titania particles are stuck to the surface of the toner particles consisting of a coloring agent and binder resin. While the fine silica powder having <=0.1mum average particle size is used, the titania particles having >=1.1mum average grain size are used. A Henschel mixer and V-type blender, etc., are used as a mixer in order to stick the fine silica particles and titania particles to the toner particle surface. The toner with which the fogging by the reverse polarity toner hardly arises is obtd. in this way. |
