[Jewelry making - Article 00138] - Re: [Orchid] Coloring 18k yellow gold

[Beth Rosengard]

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>     The silver is not removed by this process.  Other acids and
>     procedures are needed if you want the surface to really be 24K. 

    Thanks, Peter!  Now it almost makes sense :-).  When you heat the
    alloy, copper oxides are formed at the surface and these are removed
    by pickle. But ... are silver oxides formed at the surface at the
    same time?  Or do these other acids actually act on the alloy itself? 

Beth



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