[Jewelry making - Article 00088] - Re: [Orchid] Silver tarnishing fast

[Helen Hill]

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    Well you've sort of answered your own question really. Silver will
    react with sulfur in the atmosphere to form silver sulfide - tarnish.
    I'm not sure about the casting of special magnets scenario, but with
    the fridge coils, I would imagine that the onions are releasing
    sulfur compounds which are reacting with the metals to produce
    aluminium sulfide, silver sulfide and copper sulfide. Onions contain
    volatile sulfur compounds and it's those that make you cry when
    cutting them. 

Helen
UK
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