Sulfation of Wool as a Dye-Resist Process

Abstract

Treatment of wool fabric for short periods at 3° and 21° with concentrated sulfuric acid confers on the fabric a marked resist to some acid dyes. By controlling the sulfation conditions, the accompanying loss in strength is minimized. This resist is stable to prolonged boiling in the dyebath and to acid and alkali.

Keywords

Plain-weave worsteds wool fabrics sulfuric acid sulfur trioxide reactants. Sulfated wool Chemically modified wool. Dyeing. Cetyl trimethyl ammonium bromide cationic wetting agent Teric N8 (I.C.I.) (TN)nonionic detergent Xylene Fast Blue P (Sandoz) (C. I. Acid Blue 82) (TN)acid dye. Temperature concentration time. Dye uptake weight change area shrinkage milling shrinkage dye resist dye migration yellowing washfastness abrasion resistance breaking strength fabric degradation. Sulfation reactions (chemical)washfastness tests physical tests.

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