[Jewelry making - Article 00287] - Re: [Orchid] Is white gold really hot?

[James Binnion]

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    Last time I asked ABI about hardness numbers they could not give
    them  to me. As for tarnish resistance there are no standardized
    tests. The  lab tests that are done are typically unique to the lab
    doing them  and do not take into account things like abrasive wear
    which removes  heat generated protective oxides and other anti
    tarnish films once  the item is worn. There is an awful lot of
    hyperbole about these new  alloys and little or no independent
    testing being published. 

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