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Pho′to-graph-e-namel.

A process of transforming photographic plates into colored enamels. Two methods are employed. In the first, introduced by De Camarsac of Paris, colored vitrifiable powders are applied with the pencil to the different parts of the proof on glass, and the whole is raised to the necessary heat in a muffle. In the second, that of Tessie du Motay and Marechal of Metz, the photographic proof, taken in the ordinary way, but made as forcible as possible, is immersed in solutions of other metals by which the silver is displaced. If this be done successively in several baths, with exposure of different parts of the device in each, the subsequent process of enameling will furnish corresponding varieties of tint.

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