[Jewelry making - Article 00657] - Re: [Orchid] Vaccum castings and Fire scales

[JoAnna Kelleher]

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    Christine, Make sure that you are casting at the proper temperature. 
    I believe it's about 1950=B0 F, but check w/ your supplier of de-ox or
    with Hoover and Strong. It is about 200=B0 F higher than sterling. And
    also make sure you let it cool for about 20 minutes after casting
    before quenching. If you do those two things, you should eliminate
    the brittleness problem. We had the same problems with de-ox when we
    first started working with it. Also, as with all metals, make sure
    everything is properly sprued. Hope that helps! 

JoAnna Kelleher, Director of Operations
Pearl Exotics Trading Company
www.pearlexotics.com

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