Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 347
neutral solution; andexcess of acetic acid does not matter, but the slightest quantity of free hjdrochloricacid will considerably affect the results. When a mixture of soda ash and sodium ace-tate is used for neutralizing, their relative quantities should be so adjusted as to leavethe solution… … The dyed 3arn is then putthrough a final process of bright-ening, which is done by workingthe yarn for a short time at 140° F.in a solution of 4 grams of soap perliter. A good olive oil soap shouldbe used, otherwise j^ellower tonedshades may be produced. Bluerbut not so bright shades may beobtained…
Dyes and dyeing · Textile fabrics
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