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<p>[QUOTE=&quot;Oldhoopster, post: 3425199, member: 84179&quot;]That&#039;s the problem, there really isn&#039;t a good, cost effective way to do a non-destructive test to show it&#039;s brass.&nbsp; XRD and SEM/EDS penetrate slightly below the surface, and since the copper plate is so thin, the analysis can pick up some of the Zinc in the core, resulting in erroneous results.[/QUOTE]</p><p><br /></p>

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