| 摘要 |
PURPOSE:To obtain a color toner for positively charged electrophotography having high transparency, age stability, superior fluidity, fixing characteristics, and reduced contaminating effect for white base part of obtd. picture image. CONSTITUTION:The titled toner contains a compd. expressed by the formula (I) wherein X is Cl or So<->3; m is 1 or 2, n is 1 or 2; M is Mg, Ca, or Ba. When X is Cl, m is 1, and n is 2, respectively. When X is SO<->3, m is 2 and n is 1, respectively. the compd. (I) functions as a coloring agent and a positive charge controlling agent, having superior compatibility with a binder. When (I) is contained in a toner, the specific electric charge of the toner is increased as well as the moisture resistance of the toner is improved. Accordingly, the age stability of the toner is increased and the toner has extremely high capacity for forming picture image repeatedly. The formula (I-1) shows specific examples for the compd. (I). |
