| 摘要 |
PURPOSE:To prevent early occurrence of fog and staining in a copying machine by using a carrier having a specified coating layer on each core grain and a toner containing a colorant and an electrification controller dispersed into a resin. CONSTITUTION:The developer is composed of the carrier prepared by coating each core grain with the coating layer containing the graft or block copolymer of fluorinated alkyl, such as 1,1-dihydroperfluoroethyl or propyl, (meth)acrylate, and as another copolymerizing component, such as styrene, methylstyrene, or dimethylstyrene, and of the toner containing the Cr complex salt of a 0,0'- dihydroxyazo dye dispersed into the resin as the colorant and the electrification controller, thus permitting early occurrence of fog and staining in the machine to be prevented and the obtained developer to be extended in life. |
