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.
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Harris, M., Mease, R., and Rutherford, H., The Reaction of Wool with Strong Solutions of Sulfuric Add, J. Res. Natl. Bur. Stand.18, 343-350 (1937).
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Kirkpatrick, A. and Maclaren, J.A., Studies in Wool Yellowing. Part VIII: Yellowing of Modified Wools with Diminished Cystine Contents, Textile Res. J.34, 1082-1085 (1964).
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Reitz, H.C. , Ferrel, R.E., Fraenkel-Conrat , H., and Olcott, H.S., Action of Sulfating Agents on Proteins and Model Substances. I, Concentrated Sulfuric Acid, J. Amer. Chem. Soc.68, 1024-1035 (1946 ).
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Stott, G.L. , The Accelerotor as a Test Machine for Felting Shrinkage, Textile Res. J.31, 977-980 (1961).
