| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the excessive lowering of the fluidity of a toner even in recycling, to prevent toner jamming in a developing machine and to obtain a high quality image having constant image density by mixing three additives different from one another in BET specific surface area as an additive. SOLUTION: A toner containing at least a bonding resin, an electrostatic charge controlling agent and an additive is prepared and three additives 2 to 4 different from one another in BET specific surface area are mixed as the additive to make the toner recyclable. When adequate amounts of three additives 2 to 4 distinctly different from one another in BET specific surface area are used, the large particle diameter additive 2 and the medium particle diameter additive 3 stick to the surfaces of the matrix toner particles so as to absorb external force and the small particle diameter additive 2 sticks so as to impart fluidity. By the shock relieving effect of the large particle diameter additive 2, the embedding of the small particle diameter additive 4 in the toner is prevented and fluidity can be retained.</p> |
