[Jewelry making - Article 00744] - Re: [Orchid] Super pickle...

[Thomas Janstrom]

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Hi Helen,

>     If the sterling alloy contains any nickel then there would be
>     magnetic particles. In the UK sterling is 92.5% silver and 7.5%
>     copper but I've been told that in the States, the 7.5% isn't
>     always pure copper. Any chance there could be some nickel in there? 

    I can't really answer that, but it is a possibility, but to my
    knowledge sterling silver (more or less regardless of where you are
    in the world is 925:75 silver/copper alloy, other alloys are always
    possible and do exist, but AFAIK they tend to go by proprietary names
    (eg Argentium). 

    That said maybe he was pickling a nickel silver, some alloys have
    rather high silver content and could be mistaken for sterling, which
    might result in nickel grains being left in the pickle. 

    BTW I don't know how nickel reacts to a Sparex based pickle, or if
    the addition of peroxide will change this. From dim memory I seem to
    remember nickel being rather corrosion resistant, so maybe this isn't
    a possibility after all. Oh well back to the chemistry books, maybe
    I'll learn something new! 

Cheers, Thomas.
Janstrom Designs.
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