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Learning the Art of Lost Wax Casting

We are offering a new class format for our Lost Wax Casting class this year. Instead of two full-day sessions, we are doing six short evening sessions once a week, beginning on March 13 and ending in April.

Lost wax casting has been in use for centuries and this method is known for its ability to create intricate and elaborate designs. The earliest known example of this technique is from at least 5,000 B.C.E., and the process has changed little since then.

Here is a peek into the process of lost wax casting and ceramic shell investment:

1. Wax patterns are created by casting off of an existing object or carving by hand.

2. The patterns are dipped into ceramic slurry until they have built up a thick outer layer. Ceramic slurry is made up of a liquid binder and suspended particulates, including sand and colloidal silica.

3. & 4. The dipped patterns are fired in a kiln, which hardens the ceramic shell and melts the wax out of the interior.

5. The hollow molds are lined up to be poured.

6. After cooling, the outer ceramic shell can be broken to reveal the metal casting inside!

The Metal Museum Foundry uses this process to complete a variety of projects, including the Freedom Awards for the National Civil Rights Museum. This method works best for creating complex and detailed metal objects that cannot be cast in a parted mold.

During this six-week session class you will learn all stages of the process, including wax working, spruing, ceramic shell mold making, burnout, casting, and finishing. You can sign up by visiting this link!

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