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 22
lons, is filled with water andthen heated to 113—122° F, to which are added 6-8 lbs. of Hydrosulphite O and 1—2/2 ozs. ofIndigo MLB/R Vat I. The bath is stirred up well, and the evenly wetted yarn entered uponbent rods; it is worked for some time and then immersed for x/a—1 hour under the surfaceof… … Pearl shades which are not quite as fast to light and wearing as those described above,but which are considerably faster than those obtained with Methyl Violet in a soap bath, areproduced with Fast Acid Blue R in a bath containing Sulphurous acid. This bath is preparedwith 10°/o Bisulphite…
Dyes and dyeing
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