| 摘要 |
PURPOSE:To improve fluidity and to stabilize electrifying characteristic by incorporating insulating toner particle of which the dependency of dynamic current on impressed voltage is within a specific condition range and solid wax particles dispersed to exist mixedly among the toner particles of the powder. CONSTITUTION:Pulverous powder of a magnetic material and necessary toner particles such as a coloring agent, charge controlling agent and other additives, etc. to be added according to need are incorporated into the particle material of a binder resin and the insulating magnetic toner particle of which the dependency of the dynamic current IV on the impressed voltage satisfies the conditions expressed by the equation I or equation II [IV(+500), IV(+200), IV(-500), IV(-200) respectively denote IV at +500V, +200V, -500V, -200V impressed voltages] is obtd. Solid wax is added thereto and the mixture is gently agitated and mixed, by which the toner for developing electrostatic latent image contg. solid wax particles having >=0.1mum grain size in a way as to exist mixedly among the toner particles is obtd. |
