1901年,BASF合成并生产了第1只还原染料(还原染料RSN),距今超过一百年,如果说1987年合成靛蓝早已诞生于BASF,那离百年就更远了.还原染料化学结构复杂,合成过程冗长、三废量大、难于处理,所以价格昂贵.但因其色彩鲜艳、密度高,非其他棉用染料所能取代.还原染料除了印染,经颜料化后,某些染料可制得高档有机颜料,有些品种还能拓展到光物理、电化学领域的液晶、光导材料等高科技领域,是不可缺失的功能材料,旧貌换新颜.%The first vat dye (vat dye RSN) was synthesized and produced by BASF in 1901, which was more than 100 years. Considering indigo blue was synthesized by BASF in 1987, it has a history of far more than 100 years. Vat dyes are expensive because of its complex chemical structure and long synthesis process with large amount of "three wastes" that are difficult to deal with. However, vat dyes are colourful, high color density and impossible to be replaced by any other dyes. Besides printing and dyeing, vat dyes can obtain high-grade organic pigments after pigmentation. Some of those high-grade organic pigments can extend to optical physics, liquid crystal in the electrochemistry optical material fields and other high-tech fields, which are indispensable function materials and completely changed.
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