), sulphate of copper ("bluestone"), or bichrome, you would get no black at all. [Please select]
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Now the use of certain coal-tar black dyes in place of logwood obviates this use of bichrome, and thus the heavy stress on the fibre in mordanting with it. [Please select]
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I take a solution of acetate of lead (sugar of lead), and to it I add some solution of bichrome (potassium bichromate). [Please select]
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