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Typo: A Monthly Newspaper and Literary Review, Volume 4

The Sand-Blast in Lithography.—

The Sand-Blast in Lithography.—

Mr. J. L. Mills, of Messrs Keep & Co., London, has turned the principle of the sand-blast to account in an instrument bearing some resemblance to the now well-known air-brush. Emery powder of any degree of fineness is used, and is applied by means of compressed air. The process is not available for the highest class of work; but for street-posters in colors, &c, it is admirably adapted, and the work can be produced in one-tenth the time occupied by the ordinary method. The design having been lightly traced on the stone, which is covered with a smooth black surface of bitumen, the artist turns on his air, and works from black to white, drawing and shading the picture in one operation, and with astonishing ease and rapidity.—The invention is applicable to the production of steel-plates, the laying-in of grounds for mezzo-tint engravers, and numerous other operations, which will readily occur to the practical workman.