| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide black toner excellent in reproducibility of a black color by reducing an average primary particle diameter of carbon black dispersed in the toner, and providing the broad particle diameter distribution. SOLUTION: In electrostatic latent image developing black toner containing binder resin and carbon black, the content of the carbon black is set to 2 to 20 pts.wt. to the binder resin 100 pts.wt. An average primary particle diameter of the carbon black dispersed in the binder resin is set to 15 to 35nm, and primary particles existing in a range of an average primary particle diameter±5nm is set to 15 to 40 piece number %, and primary particles existing in a range of an average primary particle diameter±15nm is set to 45 to 75 piece number %, and primary particles existing in a range of an average primary particle diameter +15nm to an average primary particle diameter +45nm is set to 15 to 35 piece number %. Therefore, a black toner for a full color image forming device which is excellent in dispersibility to the binder resin and by which a fog of an image is not generated, can be obtained.</p> |
