Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 465
HSOj + Zn(XaSO.O + H2O. Zinc Sodium bisulphite Sodium hydro-sulphite Zinc-sodiumbisulphite Water Sodium hydrosulphite is a strong reducing agent, being itself oxidized finallj tosodium bisulphate, NaHSOi. Its use forms a verj^ convenient means for the prepara-tion of dyeing solutions of Indigo as… … Fig. 22s.—Indigo Dyeing Machine. (James Hunter Machine Co.) Exp. 151. Dyeing Indigo with Hydrosulphite Vat.—Prepare the dyevat as follows:to one liter of water (120° F.) add 2 grams of hydrosulphite powder (or 10 cc. of the aboveprepared hydrosulphite liquor); 0.5 cc. of ammonia water, and 4 cc. of…
Dyes and dyeing · Textile fabrics
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