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    • 45. 发明授权
    • Black toner for developing electrostatic latent image
    • 用于显影静电潜像的黑色调色剂
    • US6120959A
    • 2000-09-19
    • US386375
    • 1999-08-31
    • Yutaka SugizakiHirokazu Hamano
    • Yutaka SugizakiHirokazu Hamano
    • G03G9/08G03G9/09G03G9/00
    • G03G9/0904
    • A black toner for developing electrostatic latent images having colored particles and external additive(s) and the colored particles containing at least a binder resin, carbon black, a cyan pigment, a magenta pigment, and a yellow pigment. The concentration (C.sub.CB weight %) of carbon black, the concentration (C.sub.C weight %) of the cyan pigment, the concentration (C.sub.M weight %) of the magenta pigment, and the concentration (C.sub.Y weight %) of the yellow pigment in the colored particles preferably satisfy the following relationship (1);C.sub.CB .gtoreq.C.sub.M .gtoreq.C.sub.C .gtoreq.C.sub.Y ( 1).The black toner has the charging property, etc., suitable for forming black images and a high black density without showing color rendering.
    • 用于显影具有着色颗粒和外部添加剂的静电潜像的黑色调色剂和至少含有粘合剂树脂,炭黑,青色颜料,品红色颜料和黄色颜料的着色颗粒。 炭黑的浓度(CCB重量%),青色颜料的浓度(CC重量%),品红色颜料的浓度(CM重量%)和黄色颜料的浓度(CY重量%)在着色 颗粒优选满足以下关系式(1); CCB> / = CM> / = CC> / = CY(1)。黑色调色剂具有充电性能等适合于形成黑色图像和高黑色密度而不显示 显色。