The solid solution which consists of with the kinoronokinoron based

摘要

PROBLEM TO BE SOLVED: To provide a coloring agent yielding a more reddish yellow color than conventional one and having a superior staining power.;SOLUTION: The solid solution or pigment consists of a quinoloquinolone compound represented by general formula (1) and an isoindolinone compound (in the formula R₁ to R₄ each independently shows a hydrogen atom, a lower alkyl group or a lower alkoxy group).;COPYRIGHT: (C)2003,JPO