Retz Alloy.
Ruoltz Metal.
Tissier’s Metal.
File Alloys.
Geneva Composition Files.—
| I | II | |
|---|---|---|
| Copper | 64.4 | 62 |
| Tin | 18.0 | 20 |
| Zinc | 10.0 | 10 |
| Lead | 7.6 | 8 |
Vogel’s Composition Files.—
| III | IV | V | |
|---|---|---|---|
| Copper | 57.0 | 61.5 | 73.0 |
| Tin | 28.5 | 31.0 | 19.0 |
| Zinc | 78.0 | — | 8.0 |
| Lead | 7.0 | 8.5 | 8.0 |
VI.—Another alloy for composition files is copper, 8 parts; tin, 2; zinc, 1, and lead, 1—fused under a cover of borax.