Additive mixture ofcolortrichroism is red,green and blue,subtractive mixture,as its complementary colors,is cyan,ma genta and yellow,thatis the dyestuff trichroism.

颜加法混和三原为红、绿、蓝,减法混和三原则是们补,即:青、品红和黄,染料三原是后者。

Based on the colorimetry mechanism,the meaning oftrichroism is studied,as well as the synthetic and selecting principles of trichroism ofreactive and disperse dyes in particular.

本文学原理说明三原意义,并详细论述活性染料及分散染料三原合成和筛选原则。