The dyeing of cotton fabrics : a practical handbook for the dyer and student (1901)
Beech, Franklin · London : Scott, Greenwood · leaf 211
e latter attacks the hydrogen which it has taken up, andindigotin is reformed, the indigo white changing again intoindiao blue. Indigo dyeing_consists of three operations :— THE PRACTICE OF INDIGO DYEING ON COTTON. 199 (1) Preparation of the iiidii^o solution, or, as it is called,setting the dye… … Fig. 30.—ludigo Dye-vat for Cloth. (1) With lime and copperas. (2) Zinc and hme vat. (3) Zinc and bisulphite of soda. In all cases it is necessary for the indigo to be groundto the form of a fine paste with water ; this is usually donein w^hat is known as the ball-grinding mill. The finer itis…
Dyes and dyeing
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