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<p>[QUOTE=&quot;Jivvy, post: 392498, member: 8184&quot;]Have you tried the old-school &quot;tooth tap&quot; test? Where you tap the material on your tooth?&nbsp; If you&#039;ve never done it before, try it with a variety of plastics and glass.&nbsp; </p><p><br /></p><p>For me, it is the absolute quickest way to determine if something is glass. </p><p><br /></p><p>Whitby jet is also warm to the touch.[/QUOTE]</p><p><br /></p>

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