Invention Grant
US06933092B2 Magenta toner for electrophotography and full color image formation method 有权
用于电子照相的洋红色调色剂和全色图像形成方法

Magenta toner for electrophotography and full color image formation method
Abstract:
A magenta toner for electrophotography includes a binder resin and a colorant, wherein the toner contains at least a naphthol pigment having a structure represented by the following general formula (1) as the colorant, and has a shape factor SF1 of 110 to 140 obtained by the equation below and a volume average particle size of 2 to 9 μm: wherein R represents the following group, and R′ represents a hydrogen atom, an alkyl group or a methoxy group; SF1=R2/A×π/4×100 wherein R represents the maximum length of the toner and A represents the projected area of the toner.
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