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A study was made of iron gaUate ink that contained 3 grams of iron per liter. Both ferric and ferrous salts and various solid acids were used. Three ink formulas were devised, one for ferric and two for ferrous salts . These inks do not deposit sediment readily and they are a little less corrosive to steel pens than the Government standard writing ink. Two of the formulas can be used to prepare ink powders that will comply with thEnrequirements of Federal Specification TTI563., Ink; Writing. CONTENTS Pap

Iron gallate inks - Liquid and powder