A practical handbook of dyeing and calico-printing. With eleven page-plates, forty-seven specimens of dyed and printed fabrics, and thirty-eight woodcuts (1874)
Crookes, William, 1832-1919 · London, Longmans, Green · leaf 539
nswer the purpose very well for extracts which have to be con-centrated above a specific gravity of 1*134, on account chiefly of the difficultyexperienced by the bubbles of aqueous vapour in escaping from a mass ofviscous liquid ; the evaporation is therefore most frequently carried on bymeans of… … liquid to be separated from the dregs by filtration, the residue being pressed,and the clear liquid is then evaporated to dryness. The extracts of dye-woods contain, in addition to the colouring matter, allthe soluble salts contained in the wood, also the nitrogenous matter, theglucosides, and…
Dyes and dyeing · Calico-printing
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