Smith's Practical dyer's guide : containing five hundred dyed patterns, to each of which a genuine receipt is given : the work comprises practical instructions in the dyeing of silk, cotton, and wool, in a raw and manufactured state, also instructions for dyeing plain and mixed fabrics ... also receipts for making all the dye spirits with which to dye every colour in the work (1880)
42 WOOLLENS. … but I have used in the place of them, one fourth part of Oil of Vitriol, one fourth of Aquafortis, and two fourths of Spirits of Salts, and have found these to answer every purpose of the Blue Spirits. No. 73. I 4 Ends, 24 lbs. each. DAEK EOYAL BLUE. Dye with 6 lbs, of Prussiate. 6 quarts of Eoyal…
Dyes and dyeing · Color in the textile industries
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.