Harper's new monthly magazine 259, DEC 1871
The following method is recommended for dyeing aniline blue upon wool. The quantities given are sufficient for twenty yards. Three-quarters of a pound of Marseilles soap are dissolved by boiling, and when cold and sufficiently diluted with soft water, the goods are soaked in the liquid and well wrung. They are then placed in a bath of hot water acidulated with sulphuric acid, to which the coloring solution is added in accordance with the shade required. This solution consists of an ounce and a half of aniline blue in a pound and a half of alcohol of 90 per cent. Rinsing, drying, pressing, and, when found suitable, sizing with a little glue, finish the process.
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