Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 434
subsequent oxidation of the indigo-whiteto indigo-blue, as then the action of the oxygen is slower and more uniform,giving better penetrated colors and also causing the dyestuff to be pre-cipitated in a finer state of division, which results in faster and bettercolors. If there is not sufficient… … Fig. 217.—Machine for Dyeing Loose Stock with Indigo and Vat Colors. The fastness of Indigo is said to be improved by an after-treatment withbluestone and acetic acid. The use of glue in the vat also has the sameeffect.* Indigo is frequently bottomed by first dyeing with certain substantiveor…
Dyes and dyeing · Textile fabrics
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