To Dye Wool with Indigo

Take fresh men's urine and 1 1/2 oz. of indigo to 5 pounds of yarn. Let the indigo soak overnight in the urine and grind it as fine as possible. Pour in the urine and stir it up well. If debris appears to settle out, pour or strain it into a glazed pot and put in a little ground antimony. Let stand 24 hours in a warm place. When you wish to dye, let the yarn boil in alum water for half an hour. Drain the yarn and afterwards lay it wet into the indigo pot. Turn the yarn often so that it will not become unevenly dyed, and let it lie until it is blue enough. If the yarn is not a dark enough blue, put in more indigo.

Citation Type  Fabric Dye Recipe
Citation Year 1677