| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrophotographic toner which is excellent in storage stability and durability at high temperature though it can be fixed at low temperature, and which causes no toner leak from a toner cartridge though it is spherical. SOLUTION: The electrophotographic toner includes colored resin particles comprising at least a binder resin, a colorant and a charge control agent, and an external additive, a softening temperature Ts and a flow beginning temperature Tfb of the toner measured with a flow tester are 60-90°C and 130-210°C, respectively, difference between the softening temperature and flow beginning temperature (Tfb-Ts) is 70-130°C, and a glass transition temperature of the toner measured with a differential scanning calorimeter is 50-65°C. COPYRIGHT: (C)2005,JPO&NCIPI
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