Leather dressing, including dyeing, staining and finishing (1907)
Lamb, M. C. (Morris Charles) · London : The Leather Trades Publishing Co. · leaf 177
§385. SUMACH GOAT MOROCCOS. 145 … The quantities given above refer to the amounts of dyestuff used in dyein dozen Sumach Goat (34 by 28/30 inches), Formic Acid, equal in weight t double the weight of dyestuff used was added to the dye bath.
Dyes and dyeing · Leatherwork
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
