[Jewelry making - Article 00276] - Re: [Orchid] Coloring 18k yellow gold

[Lovschal]

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    I wonder why nobody else referred to this method, - therefore this
    post: Use the following: 

    Potassium nitrate  KNO2  4 parts per weight 

    Potassiumaluminumsulphate  KAl(SO4)2, 12 H2O 2 ppw and 

    Sodium chloride (salt)  2 ppw 

    Add water till a thin slurry is reached. Fill into a fireproof
    container (not metallic) and boil. 

    Suspend the item to be 'surface enriched' from a silver wire into
    the solution and let boil for 10 - 20 minutes. Clean and scratch
    brush. Repeat as necessary. 

    A warning: Do not let the piece rest on the bottom, it simply
    dissolves (I speak from experience :-) 

    I think I owe this recipe from a previous posting here on Orchid,
    but could not find it in the archives. However, it has worked for me. 

    Regards from Niels on Bornholm, Denmark, where snow has poured down
    all day and extinguished our hopes for spring (at least for a few 
days) 


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