New Printing Ink.

Practical Magazine 16, 1876

(Chemistry applied to the Arts, Manufactures, &c.
Dyeing, Calico Printing, Bleaching, Tanning, and Allied Subjects.)

Messrs. KERCHER and EBNER have invented a new printing ink with iron base. It is prepared by first dissolving iron in sulphuric, hydro-chloric, or acetic acid. Half the solution is oxidised by means of nitric acid, after which the two halves are mixed, and precipitation is produced by the oxide of iron. The precipitate is filtered, washed, and mixed with equal parts of tannic and gallic acid, which produces a black bordering on blue. The black is washed and dried, then mixed with linseed oil, and an ink is obtained suitable for printing, lithography, and wood or metal engraving.

- Revue Industrielle, Feb. 9, 1876.