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Casting material

 
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Santa Barbarian in CA
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PostPosted: Fri Dec 09, 2005 3:02 am    Post subject: Casting material Reply with quote
I read somewhere that Rackam uses bismuth in their alloy and that its needed for the detail. But their miniatures are very brittle. Were there any other considerations besides reactivity that works for or against bismuth in alloy? Does anyone know?
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tmeier



Joined: 10 Jun 2004
Posts: 316
PostPosted: Fri Dec 09, 2005 7:50 am    Post subject: Reply with quote
Bismuth is the only metal which expands as it freezes, this corrects many problems which occur because of contraction with other alloys.

I have not had good luck with Bismuth alloys, the ones I have tried aren’t stable, they get a bloom, so called ‘lead rot’ and lose flexibility.
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Santa Barbarian in CA
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PostPosted: Sun Dec 11, 2005 10:32 pm    Post subject: Reply with quote
Thank You! Very Happy
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