The coal tar colours of Farbwerke vorm. Meister, Lucius & Brüning, Hoechst on Main, Germany, and their application in wool dyeing (1910)
Farbwerke vorm. Meister Lucius & Brüning · New York, H. A. Metz · leaf 157
me time and then allowed to remain for several hours orovernight in this bleaching bath, according to the shade desired. They are afterwards hydro-extracted and dried in the open air. This process is cheapened by the use of Sodium Peroxide. To the bleaching bath isfirst added a little Sulphuric… … 0,01 % Auramine O l°/o acetic acid, afterwards stoved When bleaching with Potassium Permanganate, the goods are run for /s an hour at120—140° F into a bath containing 1—3°/0 Potassium Permanganate; they turn brown in thistime, and the brown colour is then discharged by passing the pieces into a…
Dyes and dyeing
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