Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 505
l amount of calcium acetate to the dyebath with Logwood issaid to be beneficial, in that it gives a greater intensity of color; the addition of this salt,however, is only necessary where the water employed is deficient in lime salts. Betterresults are also obtained when the mordanted wool is… … Fig. 249.—Hydraulic Mangle. (Weisbach.) Exp. 173. Direct Chrome Black for Wool.—By boiling a solution of Logwood with potassium bichromate a black precipitate is obtained which may be used by the dyer asa direct chrome black. The paste is mixed with water and dissolved in oxalic acid,and the wool…
Dyes and dyeing · Textile fabrics
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