[Jewelry making - Article 00471] - Re: [Orchid] Dip plating

[d.kelsall]

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>             Hi Have any of you tried, or hea rd of,  gold plating a
>     metal object by dipping it in molten gold then b urnishing etc the
>     surface? 

    There is an old non-electrolytic process of 'dip plating' that
    involves some very poisonous chemicals.  The bath u sed is made up of
    1 pint distilled water, 50 grams s odium (or potassium)
    pyrophosphate, 1 gram gold chloride a nd 1.5 grams potassium cyanide.
     It is used at about 90 deg. C.  The article is suspended from a
    brass wi re, and is constantly agitated for the few seconds that it
    is in the bath, then taken out, rinsed in fresh w ater, dried in warm
    sawdust, and burnished if you like. A better 'strike' is got by first
    passing the scrupulous ly clean item through a very dilute solution
    of mercuric nitrate in distilled water. But, if you try this, please
    look after your nervous s ystem.  We don't want you to end up either
    dead or 'mad as a hatter'. 

David Kelsall


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