| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electrostatic latent image toner excellent in fluidity, electrification property and cleaning property by incorporating specified inorg. fine particles as an external additive having the same polarity or opposite polarity for electrification to the polarity of the toner. SOLUTION: The electrostatic charge image developing toner consists of at least a binder resin, coloring agent and charge controlling agent, and it contains as an external additive, first inorg. fine particles having the same electrification polarity to the toner polarity and second inorg. fine particles having the opposite electrification polarity to the toner polarity. In this case, the particle size of the first inorg. fine particles is larger than that of the second inorg. fine particles. If the particle diameter first inorg. fine particles is smaller than that of the second particles, good electrification rising property is not obtd. because the second inorg. particles having the opposite polarity to the toner base body touch the carrier in the contact electrification process. By using the electrostatic latent image developing toner aforesaid, good image with good image quality without no fog or filming can be easily obtd.</p> |
