| 摘要 |
<p>PURPOSE:To provide an electrostatic charge image developing toner having excellent fluidity, anti-caking property and electrification property with which image defects such as black spots are hardly produced, and to provide an image forming method using this toner. CONSTITUTION:This electrostatic charge image developing toner containing a binder resin and a coloring agent contains toner particles having 3 to 10 pm average particle size and an additive satisfying the conditions of 80<=<FXw<=150 and B<=0.5. F is the sum of f calculated by f=(3<1/2>(X)DtXpt)/(2+ or -XdaXrhoa) for each external additive, w is the wt.% of the external additive to the toner, B is the proportion of the additive isolated from a toner dispersion liquid to the total amt. of the added external additive when ultrasonic vibration (60W output and 20Hz) is applied for 30min., Dt is the average particle size of the toner particles, rhot is the specific gravity of the toner particles, da is the average size of the external additive, and rhois the specific gravity of the external additive.</p> |
