The dyeing of cotton fabrics : a practical handbook for the dyer and student (1901)
Beech, Franklin · London : Scott, Greenwood & Son ; New York : D. Van Nostrand · leaf 210
THE PEACTIGE OF INDIGO DYEING ON COTTON. 199 (1) Preparation of the indigo solution, or, as it is called, setting the dye vat. (2) Steeping the cotton in this vat. (3) Exposing to the air. There are several methods of preparing, or setting the dye vat, and of each of these modifications are in use… … Fig. 30. — Indigo Dye-vat for Cloth. (1) With lime and copperas. (2) Zinc and lime vat. (3) Zinc and bisulphite of soda. In all cases it is necessary for the indigo to be ground to the form of a fine paste with water ; this is usually done in what is known as the ball-grinding mill. The finer it is…
Dyes and dyeing
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