Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 118
al treatment whichloosens up the fine and delicate filaments of the silk fiber which havebecome more or less matted together in the scouring and dyeing. Soupled silk is produced by boiling in a weaker soap solution thanwhen boiled-off silk is desired; also only one treatment is given and thetime of… … Fig. 88.—Yarn Washing Machine scouring with a bleaching operation. This may be done by steeping thescoared and rinsed silk in a cold bath of aqua regia (consisting of 1part nitric acid and 2 parts hydrochloric acid) at 4 to 5° Tw. until thefiber acquires a greenish tinge. It is then thoroughly…
Dyes and dyeing · Textile fabrics
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