Tom′bak; Tom′bac.
(Malay,
Tambaga, copper.) An East Indian alloy for cheap jewelry.
Copper, 16; tin, 1; zinc, 1.
Red tombak: copper, 11; zinc, 1.
Arsenic is added to make
white tombak.
There are a number of other varieties, the constituents and proportions of some of which are given:—
| Copper. | Zinc. | Lead. | Tin. |
Tombak for making gilt articles | 82 | 18 | 1.5 | 3 |
Tombak for making gilt articles | 82 | 18 | 3 | 1 |
Tombak for making gilt articles | 82.3 | 17.5 | .. | 0.2 |
French tombak for sword-handles, etc. | 80 | 17 | .. | 3 |
Yellow tombak of Paris, for gilt ornaments | 85.3 | 14.7 | .. | .. |
Tombak for the same purpose, from Hanover | 86 | 14 | .. | .. |
Tombak of the Okar, near Goslar, in the Hartz | 85 | 15 | .. | Trace. |
Chrysochalk | 90 | 7.9 | 1.6 | .. |
Red tombak, from Paris | 92 | 8 | .. | .. |
Red tombak, from Vienna | 97.8 | 2.2 | .. | .. |
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