Encyclopedia article on dyeing from the New International Encyclopedia (pp. 370-373). It covers the history of dyeing from antiquity (Tyrian purple) to Perkin's mauve in 1856, a table of natural dyestuffs and the artificial dyes that replaced them for cotton, wool and silk, and an explanation of mordants and classes of dyes. It also discusses theories of dyeing, preparation and bleaching of fibres, dyeing apparatus, methods such as skein, piece, cross, resist and discharge dyeing, colorfastness, and a bibliography.