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The Application of Vat Dyes to Wool and Wool–Rayon Staple Mixtures
Author(s) -
CHBBTHAM R. C.
Publication year - 1950
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1950.tb02666.x
Subject(s) - wool , dyeing , alkalinity , ultimate tensile strength , chemistry , pulp and paper industry , polymer science , materials science , composite material , organic chemistry , engineering
It is well known that difficulties are encountered when vat dyes are applied to animal fibres by normal methods chiefly owing to the loss of tensile strength due to the fibres being attacked by the alkaline liquors. In addition, when animal fibres are found in admixture with cellulosic fibres, it is often desirable to obtain solid shades on both types of fibres with vat dyes. In this paper methods are suggested for achieving both these aims by incorporating Bodium metadisilicate in the alkaline reducing liquor, and then adding sodium bisulphate to reduce alkalinity and secure Bolidity of shade. The procedure may also be adopted for the dyeing of wool alone with all classes of vat dyes provided the leuco compound is sufficiently soluble.