[Jewelry making - Article 00632] - Re: [Orchid] How can I oxidize white gold bands?

[Jeff Demand]

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    Jim, For recessed areas (which won't be in skin contact) I have
    copper plated, buffed off excess, and oxidized with liver of sulphur.
    Old pickle with a bit of binding wire works well for plating, acid
    copper won't throw well into recesses. There are also oxidizing
    solutions using tellurium in a hydrochloric acid mix, apply with a
    steel applicator. This deposits a layer of tellurium and sometimes
    works on gold. Blacker than liver of sulphur but rather delicate
    ...don't ultrasonic. 

Jeff


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