Improvements in Ink for Tissue Copying by Dry Process up to Twelve Hours after Writing without Letter Press

摘要

15,193. Geary, E. July 21. Ink.-Relates to an ink for copying without using moisture, or a press. The ink contains Aleppo galls, iron sulphate, aniline blue, glycerine, essence of cloves, and water. These ingredients are macerated and agitated with a splasher, producing an ink from which copies may be taken several hours after writing.