| 摘要 |
PURPOSE:To contrive the stability of the electrostatic property at various environments and to obtain an image of high definition by having a color toner having a specified particle size distribution and a specified additive component in a coating resin. CONSTITUTION:A carrier is coated with a resin added 0.3-15wt. parts of a nitrogen containing compound incorporating 3-30 carbon atoms for one nitrogen atom to 100wt. parts of organic resin incorporating a 3-50wt.% fluorine containing resin, being electrified at the same polarity as the toner as a coating resin. The carrier core material consists of a composition of >=98% of Ca-Zn-Fe. And the weight average particle size of the toner is 6-10mum and the toner particles having <=5mum of the particle size are 15-40% by the number of piece, the particles of 12.7-16.0mum being 0.1-5.0vol.%, and the particles of >=16mum are incorporated >=1.0vol.%. The toner particles of 6.35-10.1mum have a particle size distribution indicated with formula. V in formula is a vol. % of the toner particles of 6.35-10.1mum at the particle sizes, N being % by the number of piece at 6.35-10.1mum of the particle size and d4 represents an average weight size of the total toner particles. |
