Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 502
ed; ondissolving this in water and adding a little acetic acid and lead acetatesolution, a bright yellow precipitate of lead chromate will be formed.Chrome-mordanted Logwood will also give the following tests: Concentrated hydrochloric acid—Ieddish violet color, slowly forming.Concentrated… … Fig. 248.—Rotary Pressing Machine. These tests should all be made cold and most conveniently in small porce-lain dishes in order that the developed color may be readily seen. Logwood dyed on an iron mordant when ignited to an ash gives a red-dish brown residue; on dissolving this in hydrochloric…
Dyes and dyeing · Textile fabrics
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