| 摘要 |
PROBLEM TO BE SOLVED: To provide toner having improved low temperature fixability, capable of giving an image with stable developability even when a great number of sheets are printed, and capable of preventing contamination on a peripheral member of a fixing device or the like in a machine. SOLUTION: The toner comprises toner particles containing at least a binder resin, a colorant and a hydrocarbon wax component having a melting point of 80°C or higher and 120°C or lower. In an observation of a cross section of the toner particles by using a transmission electron microscope, the concentration A number% of particles having a shape factor SF-1 of 1.5 or less in dispersed particles of the wax component and the concentration B number% of particles having a shape factor SF-1 of 3.0 or more satisfy 30≤A≤75 and 2≤B≤20. The concentration of a volatile component in the wax, in terms of hexadecane, on a basis of the mass of the wax, is 1100 ppm or lower. COPYRIGHT: (C)2012,JPO&INPIT |
