[Jewelry making - Article 00055] - Re: [Orchid] Cloisonne Enameling on Cast Silver

[Jack]

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    Just to correct one thing Allan Heywood has said 'Sterling contains
    no Zinc - if there is Zinc there it ain't Sterling' 

    That's not true. At various times and places in the past there have
    been some stipulations about alloy content (19th century Germany,
    Austria and Russia for example) but Sterling is really just means a
    standard that contains 92.5% silver. What the other 7.5% is doesn't
    matter legally (although it might for matters of workability,
    toxicity etc). All sorts of other metals have been added to sterling
    in the US and elsewhere over the last century or so including zinc
    and cadmium and there are all sorts of proprietory alloys to minimise
    fire staining, hinder tarnishing, facilitate casting and so on. 

Best etc
Jack Ogden

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