Patent Abridgment 1860 |
149 |
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149. La Ferté, F. J. J. de, [Garnier, H., partly.] Jan. 20.
Ornamenting. Relates to the reproduction of photographic and other pictures, engravings, prints, and designs, on glass, pottery, &c. A sticky sensitive composition, which hardens when acted on by light, is made of bichromate of ammonia, or other chromium salt, honey, treacle, sugar, or other sticky organic substance, distilled water, and albumen. The composition is applied to the plate or article, dried, printed on photographically, and vitreous colour, which adheres to the sticky parts not acted on by the light, is applied by a brush. The picture or design is washed with an acid solution of spirits of wine, dried, washed with an alkaline solution, and fixed by firing. Polychromes are produced by two or more printing-processes, and one or more firing-operations. Prints on paper are made translucent by waxing the paper. |
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