Monoazo lake pigment, process for producing the same and its use

摘要

A monoazo lake pigment, a process for its production, and its use; the monoazo lake pigment is obtained by subjecting an aromatic amine having a soluble group as a diazo component and either beta -naphthol or beta -oxynaphthoic acid as a coupler component into a coupling reaction and forming a lake pigment from a coupling reaction product during or after the coupling reaction, the coupler component containing 0.1 to 30 mol% based said coupler component, of a compound of the following formula (1), o