Primitive Mold Making and Lost Wax

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Marty.Hicks
Posts: 71
Joined: Sat Mar 09, 2013 8:27 am

Primitive Mold Making and Lost Wax

Unread post by Marty.Hicks » Sun Nov 23, 2014 2:59 pm

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!
Attachments
Waxes.jpg
Waxes.jpg (486.61 KiB) Viewed 2814 times
2nd Clay Coat.jpg
2nd Clay Coat.jpg (534.96 KiB) Viewed 2814 times
Clay Molds.jpg
Clay Molds.jpg (549.43 KiB) Viewed 2814 times
Wax Melt Out.jpg
Wax Melt Out.jpg (619.47 KiB) Viewed 2814 times
Poured Molds.jpg
Poured Molds.jpg (521.86 KiB) Viewed 2814 times
Unfinished Castings.jpg
Unfinished Castings.jpg (796.65 KiB) Viewed 2814 times

bartelfitzneel
Posts: 12
Joined: Tue Aug 19, 2014 2:51 pm

Re: Primitive Mold Making and Lost Wax

Unread post by bartelfitzneel » Mon Nov 24, 2014 10:18 am

What is the composition of the molds?

Marty.Hicks
Posts: 71
Joined: Sat Mar 09, 2013 8:27 am

Re: Primitive Mold Making and Lost Wax

Unread post by Marty.Hicks » Mon Nov 24, 2014 10:00 pm

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

bartelfitzneel
Posts: 12
Joined: Tue Aug 19, 2014 2:51 pm

Re: Primitive Mold Making and Lost Wax

Unread post by bartelfitzneel » Tue Nov 25, 2014 11:43 am

very similar to medieval-esque mold recipes I've tried as well.

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