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<p>[QUOTE=&quot;huntsman53, post: 466300, member: 1242&quot;]My next question is: Can you squeeze the bubble and compress it? If not, then I would say that the Cladding has not separated from the core but the core has expanded. Since it is quite possible that the core had minute air bubbles (pockets) throughout it&#039;s make-up, then heating would cause the air bubbles to expand and thus expand the planchet. Another possibility would be that someone drilled a tiny hole on the edge and injected air into the planchet as it was heated, thus causing a similar effect as above.</p><p><br /></p><p><br /></p><p>Frank[/QUOTE]</p><p><br /></p>

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