Page 1 of 1

Primitive Mold Making and Lost Wax

Posted: Sun Nov 23, 2014 2:59 pm
by Marty.Hicks
Hello All - I'm having success casting small bronze sculpture and utilitarian objects using ancient methods. Here are some pictures of wax patterns I've carved, along with the clay and charcoal molds I've made following Meso-American techniques. We fired the molds using charcoal. The old mold material will be broken up and reused to make new molds. Thanks to Wayne Potratz, Professor Emeritas from the University of Minnesota Art Department, for passing along these techniques. I'm planning on having some workshops next year for anyone interested in doing this. Cheers!

Re: Primitive Mold Making and Lost Wax

Posted: Mon Nov 24, 2014 10:18 am
by bartelfitzneel
What is the composition of the molds?

Re: Primitive Mold Making and Lost Wax

Posted: Mon Nov 24, 2014 10:00 pm
by Marty.Hicks
Over a series of layers: charcoal (fine to coarse), clay, a little wollastonite, a little honey (face coat only), grog* (fine to coarse), and water.

The level of detail you can get is incredible because the face coat of the mold is slurry made from clay and charcoal dust instead of sand.

* crushed old molds.

-- Marty

Re: Primitive Mold Making and Lost Wax

Posted: Tue Nov 25, 2014 11:43 am
by bartelfitzneel
very similar to medieval-esque mold recipes I've tried as well.