Lucky Clover Ring
Mat Kubo shares his process for creating his lucky clover silver ring.
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Materials and Tools:
wax blank and wax sprues
carving tools, craft knife, files
jewelry investment (a plaster like powder mixed with water)
centrifuge casting machine
grinding and polishing bits
container of water for cooling
1. Carve a wax blank into the desired clover shape with carving tools, files and a craft knife.
2. Attach the wax ring to a sprue base.
4. Mix the powder investment with water and pour it into the casting flask surrounding the wax ring. Remove the bubbles from the investment mixture by placing the flask on a vibrating pad.
6. Remove the clay and the base from the flask. Carve a small pocket in the investment around the sprue base so the melted wax can escape. Place the flask in the kiln to burn out the wax. It will take approximately 4 hours.
7. Remove the flask and place it in a centrifuge-casting machine with the sprue base facing the chamber, which will hold the molten silver.
9. Release the catch on the centrifuge and activate the spin to pull the molten silver into the flask through the investment and into the mold.
10. Grasp the flask with tongs and remove it from the centrifuge. Place it in cool water.
11. Remove the silver ring and sprue from the investment.