 | Friedrich Christian Accum - 1803 - Liczba stron: 384
...to time with water. The piece is then laid upon a grate, over a charcoal fire, or in a small oven, or furnace, adapted to this purpose ; the heat drives...may be remedied by successive applications of more amalgam, and additional application of heat. Expert artists however make these additional applications... | |
 | Friedrich Christian Accum - 1808 - Liczba stron: 492
...case, the alloy must be laid on as uniformly as possible, and spread very even with a brass-wire brush, wetted from time to time with water. The piece is...to be highly noxious, on account of the mercurial fumes. After this it is rubbed with gilders wax, which may consist of four ounces of bees wax, one... | |
 | William Nicholson - 1808 - Liczba stron: 900
...The piece is then laid upon a grate, over a charcoal fire, or in a small oven or furnace adapted u> this purpose. The heat drives off the mercury, and...may be remedied by successive applications of more amalgam, and additional application of heat. TUe expert artists, however, make these additional applications... | |
 | Andrew Ure - 1821 - Liczba stron: 418
...grate, over a charcoal fire, or in a small oven or furnace adapted to this purpose. The heat drives oft' the mercury, and leaves the gold behind. Its defects...may be remedied by successive applications of more amalgam, and additional application of heat. The expert artists however, make these additional applications... | |
 | Andrew Ure - 1821 - Liczba stron: 512
...time with fair water. The piece is then laid upon a grate, over a charcoal fire, or in a small oven or furnace adapted to this purpose. The heat drives off the mercury, and leave« the gold behind. Its defects are then »etn, and may be remedied by successive applications... | |
 | Andrew Ure - 1831 - Liczba stron: 980
...time with fair water. The piece is then laid upon a grate over a charcoal fire, or in a small oven or furnace adapted to this purpose. The heat drives...the mercury, and leaves the gold behind. Its defects arc then seen, and may be remedied by successive applications of more amalgam, and additional application... | |
 | Liczba stron: 458
...a grate over a charcoal fire or in a small oven or furnace adapted to this purpose. The heat drivel off the mercury and leaves the gold behind. Its defects...may be remedied by successive applications of more amalgam and additional application of heat. The expert artists, however^ make these additional applications... | |
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Expert artists however make these additional applications while the piece remains in the furnace, though the practice is said to be highly noxious, on account of the mercurial fumes. After this it is rubbed with gilders... 