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US09488925B2 Magenta toner, developer, and image forming apparatus 有权
品红色调色剂,显影剂和图像形成装置

Magenta toner, developer, and image forming apparatus
摘要:
A magenta toner for electrophotography, including: a polyester resin; and a colorant containing a naphthol-based pigment, wherein the magenta toner for electrophotography satisfies requirements and below: [G′(100)(THF insoluble matter)] is 1.0×105 Pa to 1.0×107 Pa, and a ratio of [G′(40)(THF insoluble matter)] to the [G′(100)(THF insoluble matter)] is 3.5×10 or less, where the [G′(100)(THF insoluble matter)] is a storage modulus at 100° C. of THF insoluble matter of the toner and the [G′(40)(THF insoluble matter)] is a storage modulus at 40° C. of the THF insoluble matter of the toner; and an X-ray diffraction pattern of the naphthol-based pigment in a crystalline state has a plurality of peaks in a range of 0°≦2θ≦35°, and a sum of half value widths of the peaks is 5° to 10°.
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