| 摘要 |
PURPOSE:To improve flowability and developability by specifying the saturation moisture content in the environment of 23 deg.C and 60% humidity RH, of a flowability imparting agent. CONSTITUTION:The saturation moisture content in the environment of 23 deg.C and 60% humidity RH of the flowability imparting agent of the toner consisting of coloring agent-contg. resin particles and the flowability imparting agent is specified to 0.2 to 12.0wt.%. Namely, the good flowability imparting agent is obtd. by adequately increasing the moisture content and the moisture incorporating in the flowability imparting agent acts to suppress excessive electrostatic charge. The agent does not act to lower the electrostatic charge quantity within the designated range at under a high temp. and high humidity. Thus, the enhancement of the electrostatic chargeability is prevented and the flowability and developability of the toner are improved. |
