[Jewelry making - Article 00563] - Re: [Orchid] Problems with melting furnace

[James Binnion]

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    Your metal was too cold, it froze on the way out of the crucible. To
    pour molten metal you need to have what is called superheat. This is
    the amount of heat above the liqudius temperature of the alloy
    (1640F for sterling) necessary to sucessfully pour the metal. The
    correct amount of superheat will vary depending on the particular
    process and equipment being used. Try 1750F or even 1800F 

Jim

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
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