| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner composition with which the suppression in the generation of fogging and the maintenance in dot reproducibility are possible even if the number of prints is increased. SOLUTION: The toner composition is obtained by incorporating toner grains including a coloring agent, an electrification controlling agent and a mold releasing agent, and an external addition agent into a binder resin. The external addition agent comprises first silica with a polarity reverse to that of the toner grains, second silica with a polarity same as that of the toner grains, sodium titanate with a polarity same as that of the toner grains, and aluminum oxide with a polarity same as that of the toner grains. COPYRIGHT: (C)2006,JPO&NCIPI
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