[Jewelry making - Article 00214] - Re: [Orchid] Peroxide & Vinegar

[Lois Martens]

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    I recently had some rings cast in bronze. They came out red on the
    outside and black on the inside. I asked the castor how they treated
    and polished their pieces and he said they put them in muriatic acid
    and then tumbled them with steel shot and he showed me a finished
    piece that had a good polish and was very gold in color. 

    But, and here is where my troubles start, having followed the
    peroxide and vinegar thread I put them in this solution (heated) and
    the red disappeared. The black remained so I put them in muriatic
    acid (heated) and the black disappeared but some red came back. 

    During these procedures I see a very nice crystaline surface appear
    and I think serendipity - If I could just keep the crystal effect AND
    get a good gold color. 

    I have tried Sparex plus peroxide, Sparex plus peroxide and vinegar,
    ditto for muriatic acid, first Sparex than peroxide and vinegar and
    many variations but the pieces come out either too gray or too red. 
Is
    there a formula or is it just dump something into the solution until
    you get the right result? 

    By the way, the crystal effect is not just superficial. I can file
    and sand the areas that I want to be smooth and just by placing the
    piece in a heated solution the crystal effect will reappear. 

Lois
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