[Jewelry making - Article 00349] - [Orchid] Anneal Krugerrands

[Dezert Dog, Rex]

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Help please,

    I have several one once Krugerrands that I would like to anneal and
    run through my rolling mill. I have been told to bring them up to
    slight red and quench in water, and I have been told to let cool in
    air. Can anyone tell me which method will produce the softest
    results? Krugerrands are 22K and I believe the other metal in the mix
    is copper. With copper in the mix I need to prevent fire scale. How
    best do I prevent this? I normally work with fine silver and either
    water quench or air cool with equal results and I never have fire
    scale. 

Thanks for you help.
Rex Mongold

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