Straight from the SLA 3D printer. One can notice the supports necessary for this type of 3D printer.
Rings in Red Wax, ready for lost wax casting.
Surface is smooth and dimension accuracy very high. Red Wax is flexible, therefore you can place stones (diamonds) before casting the metal to produce perfect inserts.
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Red-Wax

Red Wax gives vrey precise cast in precious metals like brass, silver and gold.

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Guillaume Crédoz
Principal at RapidManufactory Beirut, Lebanon