Hummel, J. J. (John James), -1902, Foster, A. R, Hasluck, Paul N. (Paul Nooncree), 1854-1931 · Philadelphia : David McKay · leaf 69
ANILINE COLOURING MATTERS. ^7 The cotton is worked for 1 hour in the cold solution, until, indeed, it has acquired a considerable intensity of colour, after which the temperature is gradually raised to 50°-60° C. The whole operation may last from 1-3 hours. Another method is as follows : Dye the… … Fig. 5. — Aniline Black Dyeing Machine. after this raise the temperature gradually to 50°-60° C, and continue the dyeing for another hour. The more concentrated the solution and the greater its- acidity, the more rapidly does the dyeing take place. Excess of acid and prolonged heating tend to give…
Dyes and dyeing · Coloring matter
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
