| 摘要 |
PURPOSE:To prepare a magenta toner good in transparency and to obtain a copy in full color by using a specified quinacridone type pigment and a binder resin as main components. CONSTITUTION:The magenta toner contains as the main component the binder resin, such as polystyrene and any kind of resin so long as it has a glass transition point of 40-150 deg.C, and one of the quinacridone type pigments represented by formula I in which each of R<1> and R<2> is imino or carbonyl, and each of R<3> and R<4> is halogen or lower alkyl. Said pigment has an average particle diameter of <=0.5mum, and if >5mum, good transparency cannot be easily obtained, and it is made unsuitable for the color electrophotography, thus permitting a one-component nonmagnetic dry type magenta toner to be obtained and good in transparency and effective to obtain a color copy, especially a 3-primary color copy by the color electrophotography. |
