Azo pigment: One of the most important groups of chemical pigment for printing ink manufacture. The prime raw materials for azo pigment are a diazo component such as aromatic amine and a coupling component such as phenolic compound.

• 偶氮颜料:一类生产印刷用油墨的极重要化学颜料。偶氮颜料的主要原料是一些重氮成份如芳香族胺和一些偶联成份如酚类化合物。