. Cyclopedia of textile work : a general reference library on cotton, woollen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects . With Aluminium mordant Eed. With Chromium mordant Violet to Claret Red. With Iron mordant Violet to Purple. With Tin mordant Crimson Red. They may be applied to mordanted cotton or wool by boiling in aplain bath of the extracted color. (For methods of mordantingsee Articles 130 and 132.) 153. Insoluble Redwoods. These include bar wood, saunderswood, and cam wood. They are much harder and closer-grainedth
. Cyclopedia of textile work : a general reference library on cotton, woollen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects . With Aluminium mordant Eed. With Chromium mordant Violet to Claret Red. With Iron mordant Violet to Purple. With Tin mordant Crimson Red. They may be applied to mordanted cotton or wool by boiling in aplain bath of the extracted color. (For methods of mordantingsee Articles 130 and 132.) 153. Insoluble Redwoods. These include bar wood, saunderswood, and cam wood. They are much harder and closer-grainedthan the soluble redwoods, and their coloring jirinciple, known assantalin, is practically insoluble in water. For this reason, ex-tracts cannot be prepared, and the chips have to be added directlyto the dye l)ath. They are adjective, and also polygenetic, pro-ducing the followinj^ colors: With Aluminium mordant Red to Brownish Red. With Chromium mordant Purplish to Reddish Brown. With Iron mordant Violet to Purplish Brown. With Tin mordant Red to Brown Shades. They may be applied to mordanted wool and cotton, by boilingthe material for along time in a dye bath containing the ground 154. INDIGO DYEING MACHINE James Hunter Machine Co TEXTILE CHEMISTRY AND DYEING 145 or chipped wood. They are more valuable for the production ofcompound shades, with logwood, madder, fustic, and other naturaldyestuffs, than as self colors. None of the redwoods can be considered fast to light; butthe colors produced with the insoluble dyewoods stand millingvery well. The redwoods are very seldom used at the presenttime, artificial dyestuffs having been introduced, which give fastershades at lower cost. 154. riadder. This is prepared from the root of a plantknown botanically as Ruhia tinetorium, which is native to AsiaMinor. It was known to the ancients, and was always used bythe old school of dyers for the production of fast reds upon bothwool and cotton. It is adjective and polygenetic, giving shades
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