Shrinkproofing of Wool by Per anganate/Sodium Chloride Treatment

In the Sironized-process attention has been concentrated upon the shrinkproofing ofwool yarns and fabrics, but it has been observed that many other practical properties are also considerably modified by the processing. Thirteen items relative to the practical properties of wool were measured using the yarns and fabrics which had been treated with potas-sium permanganate/sodium chloride and potassium permanganate/water, in comparison with the untreated yarns and fabrics. It is of interest to note that the marked changes in pilling, frictional property and dye-accessibility of wool were brought about besides shrink-proofing by the treatment with permanganate/sodium chloride. The treatment with potas-sium permanganate/water xerted always smaller effects. All these phenomena seemed to be correlated with each other, and could be related to the change in the surface condition of individual fibers. The Sironized-process has been studied from the practical point of view. Further, some experiments have been done to interpret the action of sodium chloride in the processing liquor. According to McPhee',2 ' and Bradbury " the role which sodium chloride or other salts play in the processing is not simply compre