| 摘要 |
PURPOSE:To form a good visible image of a high image density without fogging for a long period of time by using a toner prepd. by adding and mixing the pulverized particles of a fluidizing agent, and a carrier formed by coating a polymer contg. a monomer component or a compsn. contg. such polymer on the surface of a core material. CONSTITUTION:The pulverized particles of the fluidizing agent to be added and mixed to and with the toner are selected from the group consisting of pulverized alumina particles, pulverized titanium particles an d pulverized nitrogen-contg. particles. The carrier to constitute a developer together with the toner is prepd. by coating the polymer contg. the monomer expressed by formula I or formula II or the compsn. contg. such polymer on the surface of the core material. In formula, R<1>, R<2> respectively denote a hydrogen atom, or methyl group, n, p respectively denote 1-8 integer, m, q respectively denote 1-19 integer. A frictional electrostatic charge characteristic is thereby obtd. stably for a long period of time and the good visible image of the high image density without fogging is formed for a long period of time. |
