Ceramic shell lost-wax molding:
The ceramic shell process allows for maximum retention of detail and complexity in cast forms. Finished waxes are dipped in a ceramic slurry and coated with various grades of sand to create a hard shell mold. When the mold is complete, it is fired in a kiln to vitrify the ceramic and evacuate the wax. This is also known as the lost-wax process.
Resin bonded sand molding:
With this process foundry molds can be made from almost any existing object, wax or not, by block molding the object in sand mixed with resin. With this process larger forms can be cast with a greater degree of geometric accuracy.