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    • 28. 发明公开
    • Developer and image forming apparatus
    • Entwickler und Bilderzeugungsvorrichtung
    • EP2116905A1
    • 2009-11-11
    • EP09157802.1
    • 2009-04-10
    • Kabushiki Kaisha ToshibaToshiba TEC Kabushiki Kaisha
    • KAWAGUCHI, Hiroshi
    • G03G9/097
    • G03G9/09708G03G9/09725G03G9/09783
    • A developer used in an image forming apparatus, the developer containing: a toner, and a carrier that charges the toner, the toner containing a core toner, and an external additive that is added to a surface of the core toner, the core toner containing a colorant, a binder resin, a releasing agent, and a charge controlling agent containing Al and Mg, an amount of the charge controlling agent on the surface of the core toner being from 0.2 to 4.0 cps/eV in terms of a Mg amount measured by EDX, the core toner having a circularity of from 0.880 to 0.930, the external additive having a primary particle diameter of from 70 to 200 nm, an amount of the external additive being from 0.2 to 3.0% by weight based on the core toner.
    • 用于图像形成装置的显影剂,所述显影剂包含:调色剂和对所述调色剂充电的载体,所述调色剂含有核心调色剂和添加到所述核心调色剂的表面的外部添加剂,所述核心调色剂含有 着色剂,粘合剂树脂,脱模剂和含有Al和Mg的电荷控制剂,核心调色剂表面上的电荷控制剂的量以测量的Mg量计为0.2至4.0cps / eV 通过EDX,核心调色剂的圆度为0.880至0.930,外部添加剂的初级粒径为70至200nm,外部添加剂的量为基于核心调色剂的0.2至3.0重量%。