[Jewelry making - Article 00516] - Re: [Orchid] Granulation Chemistry?

[James Binnion]

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    Well Tony  yes and no. You are right in so far as silver is
    concerned that a eutectic alloy may be formed but the fact that it
    is a eutectic alloy has nothing to do with the bonding. In gold
    granulation there is no eutectic alloy formation. What is happening
    is that the copper diffuses into the surface of the gold or silver
    and creates a lower melting point alloy which melts on the surfaces
    and welds the granules in place. 

Jim 

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