[Jewelry making - Article 00401] - [Orchid] Argentium Sterling Silver - tarnish resistance

[peter johns]

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>     I have recently purchased A silver from Stueller... nice
>     product... Understand that it 'Resist' tarnishing.... that's why I
>     used it!... Question is...'for how long? what can I expect from a
>     finished product?? 

Jim

    Argentium Sterling Silver has been tarnish tested using an
    International Standards Organisation Test ISO 4538: 1995
    (Thioacetamide tarnish test). The test was carried out independently
    by CATRA (Cutlery and Allied Trades Research Association) in the UK. 
    The Thioacetamide test requires samples to sit in an enclosed, gas
    tight chamber that contains a saturated solution of sodium acetate
    tri-hydrate and Thioacetamide, distributed on a horizonal plate,
    within the chamber (50mg per square decimetre of surface).  This
    ensures that the test atmosphere contains volatile suphides for the
    duration of the test, with a relative humidity of 75% at 20+/-5=B0C
    within the sealed container.  At the end of the test the standard
    sterling sample had tarnished severely and the Argentium sample
    remained clean. 

    Please let me know if you would like a copy of the report and I can
    e-mail the document to you. 

Peter

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