Scientific American Supplement, No. 586, March 26, 1887 by Various
page 73 of 134 (54%)
page 73 of 134 (54%)
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soap. If very heavy, run through lukewarm water slightly acidulated with
vitriol, rinse, hydro-extract, and hang in stove. Another method to clear them: Make up three lukewarm waters, in first put some bleaching liquor, in second a little vitriol, handle these two, and rinse through the third, hydro-extract, and hang in stove. _Note_.--This is the method employed generally in small dye-works for all dresses for black; their lots are so small. This preparation can be kept up, if care is taken that none of the sediment of the copperas (oxide of iron) is introduced when charging, as the oxide of iron creates stains. This also happens when the water used contains iron in quantity or impure copperas. The remedy is to substitute half a gill of vitriol in place of tartar. _Silk, wool, and cotton mixed dresses, for black_.--Dye the silk and wool as before described, and also the cotton in the manner previously mentioned. _Another method to dye the mixed silk and wool and cotton dresses black, four dresses_.--Bring boiler to the boil, put in 3 or 4 oz. aniline black, either the deep black or the blue black or a mixture of the two, add ΒΌ gill hydrochloric acid or sulphuric acid, or 3 oz. oxalic acid, shut off steam, enter, and handle for half an hour, lift, rinse through water, dye the cotton in the manner previously described.--_Dyer_. * * * * * |
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