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US07026088B2 Master batch and toner for use in electrophotography 失效
母版和碳粉用于电子照相术

Master batch and toner for use in electrophotography
摘要:
The master comprises a polyester resin as a binder resin and a carbon black as a colorant having a primary particle size of 10 nm to 100 nm, is blended with 30 to 60 parts by weight of the carbon black, has a lightness L* of 20 or more; and the reflectance A at 400 nm thereof and the reflectance B at 700 nm thereof fall within the range satisfying the relation given by the following formula [1]: 0.5
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