Dyeing of LEATHER, Skins, &c. Blue is given by steeping the subject a day in urine and indigo, then boiling it with alum; or it may be given by tempering the indigo
with red wine, and washing the skins therewith. Red is given by washing the skins, and laying them two hours in galls, then wringing them out, dipping them in a liquor made with ligustrum, alum, and verdigris in water; and, lastly, in a dye made of Brazil wood, boiled with ley. Purple is given by wetting the skins with a solution of roche alum in warm water; and, when dry again, rubbing them with the hand with a decoction of logwood in colder water. Green is given by smearing the skin with sap-green and alum-water boiled. Dark green is also given with steel filings and sal-ammoniac steeped in urine till soft, then smeared over the skin, which is to be dried in the shade. Sky colour is given with indigo steeped in boiling water, and the next morning warmed and smeared over the skin. Yellow, by smearing the skin over with aloes and linseed oil dissolved and strained, or by infusing it in weld. Orange colour is given by smearing with fustic berries boiled in alum-water; or, for a deep orange, with turmeric.