Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Ruby Foil
Lake or carmine, rent white glass or paste, and when applied to ground in isinglass. Or: Lake ground in foils set under colored pastes, (factitious shellac varnish. Used when the color turns gems), a superior effect may be produced. on the purple. Or: Bright lake ground in The colors must be reduced to the finest state oil; used when the color turns on the scarlet possible by patient grinding, as without this or orange. Either of these are applied to precaution, transparent and beautiful shades white foil. (See No. 2449.) cannot be formed. The palest and cleanest 2459. Το Make an Imitation Diamastich, and lac dissolved in alcohol, and also mond more Brilliant. Cover the inside of the palest and quickest drying oil, should the socket in which the stone or paste is to alone be employed, when these substances be set with tin foil, by means of a little stiff are ordered. In every case the colors must gum or size; when dry, polish the surface, be laid on the foils with a broad soft brush, heat the socket, fill it with warm quicksilver, and the operation should be performed, if let it rest for 2 or 3 minutes, after which pour possible, at once, as no part should be crossed, it out and gently fit in the stone; lastly, well or twice gone over while wet. close the work round the stone, to prevent