| 摘要 |
PURPOSE:To obtain a toner stable, sharp, and uniform in triboelectrified amt., and controllable to the amt. suitable for the developing system to be used, and having high density and superior half tone reproducibility, etc., by incorporating a specified tetraazolium compd. together with a binder. CONSTITUTION:The toner contains in a state mixed together with a binder or attached to the outside, as the charge inhibitor, a compd. represented by the formula in which each of R1-R4 is H, or one of substituents having base skeletons of hydrocarbons, such as alkyl,cycloalkyl, alkenyl,aryl, aralkyl, alkylene, and arylene groups, etc., or a group having a hetero ring contg. N, S, or O, or a combination of them; and X is Cl, Br, I, SO4, SO3, NO3, or an org. acid residue of C2O4<2->. This charge controller can keep the toner color clear in the presence of a colorant, and form a superior toner improved in storage stability before use, and prevented from offset, etc. |
