Vat dyes are a large class of water-insoluble dyes such as indigo and the anthraquinone derivatives that are used on cellulosic fibers. Vat dyes are natural coloring dyes and are insoluble in water, have a high color fastness and a poor rubbing fastness. Amarnthrene, Calconoid, Benzanthrene, Navidon, Carbenthrene, Indanthrene, Solanthrene and Supranthrene are some of the brand names of vat dyes. The original vat dye is indigo, once obtained from plants but now produced synthetically. Vat ... Read more