| 摘要 |
<p>A toner for electrostatic image development comprises toner particles containing at least a binder resin, a colorant, a charge control agent and a release agent. The toner particles have a volume mode diameter (a) of 5-10 mum, a ratio of the volume mean diameter (Dv) to the number mean diameter (Dp) (Dv/Dp) of 1.0-1.3, an average circularity of 0.94-0.97, a standard deviation (b) of particle diameters of not more than 2.5 mum, a ratio of the average circularity (C1) of toner particles having a diameter not less than (a-2b) mum but less than a mum to the average circularity (C2) of toner particles having a diameter not less than a mum but less than (a+2b) mum (C1/C2) of 1.01-1.03, and an isopropyl alcohol extract content of not more than 5 weight%. The toner for electrostatic image development is excellent in storage life, cleaning properties, and electrostatic stability and hardly causes a fog.</p> |
