[Jewelry making - Article 00205] - Re: [Orchid] Mokume gane still it will not bond

[James Binnion]

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    Laminating a billet is typically a one shot deal. I am afraid you
    will need to send it back to the refiner. The success rate of
    "fixing" bad billets is so low that I will say it almost never is
    almost never worth the time that the effort takes. 

    Eight hours is an excessive firing time. We used to do those long
    firing times but they tend to be detrimental to the success of the
    billet from excessive grain growth. 

    Palladium and gold form intermetallic crystal structures in the
    1250F range, intermetallics are brittle. This may be your problem. 

    Less time, higher temperature for that combination. 

    And for your success with shakudo and 22k, they are so easy to bond
    that if you had problems with them I would be concerned about
    serious contamination problems in your process. 

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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