Ink Powder
For an ink pow- hydrochloric, nitric, or sulphuric acid as will der take 1 pound nut-galls, 7 ounces copperas, cover it (if sulphuric acid is used it must be and 7 ounces gum-arabic. Pulverize and mix. diluted with an equal bulk of water); after This amount of ink powder will make 1 gal- standing 48 hours or more, add plenty of walon of good black ink. Two or three powdered clovesshould be mixed with each pound of powder, to prevent moulding.