PURPOSE: To obtain a bright and transparent yellow or orange color image without fog and to obtain a copy having good light resistance by using a dye of specified compsn. for a piece-dying color toner.
CONSTITUTION: The dye for a piece-dying color toner is expressed by formula, and the dye is used for the color toner. In formula, aromatic rings A and C are phenyl groups which may have substituents, an aromatic ring B is a phenylene group which may have substituents, and these substituents may couple to form naphthalene rings or quinoline rings. The color toner is obtd. by dyeing a toner resin by using the yellow or orange color dye expressed by formula and a nonion or anion dispersant. As for the auxiliaries, a nonion or anion dispersant is used. The dispersant to be used to dye the piece-dyeing color toner must be colorless or slightly colored because if the dispersant itself is colored, decoloration is not completely performed although a water-washing process or the like is included.
AIDA ISAMU
TANAKA HIRONORI
MATSUZAKI YORIAKI
TAKUMA HIROSUKE
