United States or Serbia ? Vote for the TOP Country of the Week !
Such mordants as "red liquor" and "iron liquor," which are acetates of alumina and iron respectively, are also wasted, a portion of them being precipitated by the lime, thus weakening the mordant baths. Ferruginous Impurities in Water. Iron in solution in water is very objectionable in dyeing operations.
They know how to get different grays and purples and black from logwood, and golden and dark brown from walnut bark, and all the shades of blue possible to indigo; and yellow-reds from madder, and rose-red and crimson from pokeberry, and one yellow from pumpkin and another from goldenrod; and they are clever enough to find mordants for all these dyes and stains, and make them indelible.
Most mordants are salts, or bodies resembling salts, and hence we must commence our study of mordants by a consideration of the nature of salts.
Word Of The Day