| 摘要 |
PURPOSE:To obtain the toner which has a sufficient triboelectrostatic charge quantity, is uniform in the triboelectrostatic charge quantity between the toners and is free from fogging by incorporating at least one kind of compds. having mercaptoimidazole skeleton or cyclic thiourea skeleton. CONSTITUTION:At least one kind of compds. having mercaptoimidazole skeleton or cyclic thiourea skeleton are incorporated into this toner. Namely, the compds. having the mercaptoimidazole skeleton or the cyclic thiourea skeleton have sufficient triboelectrostatic chargeability. When the compds. are incorporated into the toner, this toner has the sufficient triboelectrostatic charge quantity. The sufficient triboelectrostatic charge quantity is obtd. in this way and the triboelectrostatic charge quantity between the toners is uniform. The high density and sharp images are thus obtd. and the images of a sufficient density are obtd. even after copying in a large amt. |
