There are two different methods to set stones into PMC. One is setting the stones into the raw PMC before firing and then firing the stone into the PMC to secure the stone. The second way is to fire the PMC piece without the stone, and then add the stone in a traditional metal setting that is soldered onto the PMC base.
Both methods have use, because many stones cannot be fired in the kiln and survive the heat.
If you want to set stones into Precious Metal Clay, first it is important to know more about the stones that you would like to set. Most cubic zirconia are capable of being fired into PMC, and some natural stones. Before you decide to use a stone, make sure that it will not be altered by the heat of kiln firing. Most cubic zirconias and lab made stones are tested for use with Precious Metal Clay.
To set a stone into PMC for firing:
1. Clay must be in its wet, raw form for setting a stone.
2. Determine where you want to set the stone in your piece.
3. Create a small hole in your base piece. The hole will not show because it will end up being directly underneath your stone.
4. Determine what type of bezel you would like to surround your stone.
5. Form your bezel around your stone.
6. Attach your bezel to the base piece of PMC with PMC paste or slip.
7. Add any deorations to the bezel that you wish with a syringe or applique method.
8. Allow your piece to dry overnight to make sure it is thoroughly dry.
9. Dry finish your piece and fill in any cracks with slip.
10. Allow the piece to dry again.
11. Fire the piece in the kiln at the proper temperature for stone settings.
12. After firing, do not quench the piece in cold water. Allow the piece to cool slowly on its own. If you quench it quickly, it might upset the stone setting.
13. Once your piece is cool, you can clean, polish, and finish it.
To set a stone on a fired piece of Precious Metal Clay:
1. Clean, but do not polish or add a patina to your fired piece.
2. Lightly file the surface of the PMC where you are going to attach the bezel or prong setting.
3. Solder your setting to the PMC as you would to any other silver piece. Unless you have already used solder, it is best to use easy.
4. Once the bezel or prong setting is attached, polish and add any patina that you want to the piece.
5. Set your stone into the setting normally.
For more comprehensive information on setting stones into Precious Metal Clay, and PMC resources, follow this link.
Learn more about this author, Paula Atwell.
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