[Jewelry making - Article 01753] - Re: [Orchid] Rhodium plating without nickel under plate

[John Donivan]

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>     In my experience rhodium is one of the more difficult solutions to
>     master. 

    Man, that Otto Frei!! Where would we be without them?? Aren't they
    the best? (True, but kidding, too). Steve Frei and I aren't exactly
    pals, but we've known each other over the years, and as it turns out
    he's an Orchid reader (Hi, Steve). Whatever his title is, he's
    pretty much the boss over there. He called me this morning and gave
    me the scoop on this topic. He called the chemist at Cohler, who's
    also a partner of the company. Cohler is the company that makes the
    plating solutions that Frei carries. The chemist told him "No way is
    silver going to contaminate a rhodium plating bath." My chemistry
    background tells me the same thing, but then again I've watched
    silver items destroy a solution. As we discussed this morning, maybe
    it's not the silver at all, but other things (solder...). Anyway,
    that's pretty much the horse's mouth. There is a small rhodium
    plating guide off of this page: 

    http://www.jewelrytoolstips.com/techtips.html 

    which is Otto Frei's tech page, too. They do say that silver should
    be preplated for best results, too. But again, according to the guy
    who makes it, silver should be fine in a rhodium bath. 

http://www.donivanandmaggiora.com
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