Cadmium Alloys With Gold, Silver, And Copper.
II.—Gold, 750 parts; silver, 125 parts; and cadmium, 125 parts. Malleable and ductile alloy of yellowish-green hue.
III.—Gold, 746 parts; silver, 114 parts; copper, 97 parts; and cadmium, 43 parts. Likewise a malleable and ductile alloy of a peculiar green shade. All these alloys are suitable for plating. As regards their production, each must be carefully melted together from its ingredients in a covered crucible lined with coal dust, or in a graphite crucible. Next, the alloy has to be remelted in a graphite crucible with charcoal (or rosin powder) and borax. If, in spite thereof, a considerable portion of the cadmium should have evaporated, the alloy must be re-fused once more with an addition of cadmium.
Alloys For Casting Coins, Medallions, Etc.
Alloys which fulfill the requirements of the medalist, and capable, therefore, of reproducing all details, are the following:
| I | II | ||
|---|---|---|---|
| Tin | 3 | 6 | parts |
| Lead | 13 | 8 | parts |
| Bismuth | 6 | 14 | parts |
III.—A soft alloy suitable to take impressions of woodcuts, coins, metals, engravings, etc., and which must melt at a low degree of heat, is made out of bismuth, 3 parts; tin, 1 1/2 parts; lead, 2 1/2 parts; and worn-out type, 1 part.
Acid-proof Alloy.
| Copper | 74.75 parts |
| Zinc | 0.61 parts |
| Lead | 16.35 parts |
| Tin | 0.91 parts |
| Iron | 0.43 parts |
| Nickel or Cobalt | 0.24 parts |
| Antimony | 6.78 parts |
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