III.—Thirty parts of verdigris; 30 parts of sea salt; 30 parts of hematite; 30 parts of sal ammoniac, and 5 parts of alum. This must be all ground up together and mixed with strong vinegar; or we may also use 100 parts of verdigris; 100 parts of hydrochlorate of ammonia; 65 parts of saltpeter, and 40 parts of copper filings, all of which are to be well mixed with strong vinegar.
22-carat Solder.
| dwts. | grs. | |
|---|---|---|
| Fine gold | 1 | 0 |
| Fine silver | 0 | 3 |
| Fine copper | 0 | 2 |
| 1 | 5 |
This mixture will answer all the many purposes of the jobber; for soldering high quality gold wares that come for repairs, particularly wedding rings, it will be found admirably suited. If an easier solder is wanted, and such is very often the case with jobbing jewelers, especially where several solderings have to be accomplished, it is as well to have at hand a solder which will not disturb the previous soldering places, for if this is not prevented a very simple job is made very difficult, and a lot of time and patience wholly wasted. To guard against a thing of this kind the following solder may be employed on the top of the previous one:
| dwts. | grs. | |
|---|---|---|
| Fine gold | 1 | 0 |
| Fine silver | 0 | 3 |
| Yellow brass | 0 | 2 |
| 1 | 5 |
This solder is of the same value as the previous one, but its melting point is lower, and it will be found useful for many purposes that can be turned to good account in a jobbing jeweler’s business.
Jewelers’ Alloys:
See also Alloys and Solders.