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<p>[QUOTE=&quot;evelyb30, post: 11287316, member: 36&quot;]On a testing stone, that&#039;s how it works.&nbsp; If you apply 18k acid directly to silverplate on brass, it bubbles up and the foam turns green.&nbsp; I&#039;m not sure about applying it to the real stuff. There&#039;s a difference between real silver and silver on white metal, but I&#039;m not good enough to know how to tell someone to sort that one out. The stone is a lot easier.[/QUOTE]</p><p><br /></p>

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