| 摘要 |
PURPOSE:To sharpen an image and to enable successive use of a toner by mixing a specified electric charge controller with the toner. CONSTITUTION:The electropholographic toner is mixed with the charge controller represented by formula I in which each of R1 and R4 is H, alkyl, or the like; each of R2 and R3 is optionally substituted aryl; and M is a divalent metal atom, and this controller is embodied by a compound of formula II and the like, thus permitting the compound to be good in dispersibility into a resin, and in heat stability at a melt kneading temperature, and the like, and colorless, and accordingly, the toner to form a sharp image and to be used for successive operations. |
