| abstract |
PROBLEM TO BE SOLVED: To improve the fluidity of a developer and to obtain a stable charging characteristic, so that the developing property and the cleaning property are good, the charge rising property is good, filming, toner scattering, A good image is formed without causing image fogging. SOLUTION: The composition contains a positive charge control agent and a negative charge control agent, and has a 50% average diameter of 7 to 10 μm and an average circularity of 0.93 to 0.95. 1.0, toner particles having a circularity of 0.93 or less, % And the 10% average diameter of the cumulative number particle size distribution is 45 to 80% of the 50% average diameter. |