| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner which enables low-temperature fixation, is excellent in offset resistance and storage stability, stably provides high image quality even when the toner is used at a high humidity or a low humidity, and does not cause any image failure with time. SOLUTION: The toner includes a binder resin and a colorant, in which the binder resin contains a polyester unit and a vinyl copolymer unit; a main peak MpA is present in the molecular weight region of 2,000 to 7,000 in a molecular weight distribution measured by means of gel permeation chromatography (GPC) of a specific tetrahydrofuran (THF) soluble fraction A measured by a specific method; a main peak MpB is present in the molecular weight region of 5,000 to 10,000 in a molecular weight distribution measured by means of GPC of a specific THF soluble fraction B which contains a component of a molecular weight region of 100,000 or less in range from 70 to 100 mass%, and the peak molecular weight MpA of the THF soluble fraction A and the peak molecular weight MpB of the THF soluble fraction B satisfy a specific equation. COPYRIGHT: (C)2007,JPO&INPIT
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