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<p>[QUOTE=&quot;Conder101, post: 40385, member: 66&quot;]If somehow you did manage to get some hard &quot;lump&quot; trapped between the layers when the initial ingot was created it would either be crushed and/or poked through the outer layers during the rolling out of the ingot to the thickness of the planchets.</p><p><br /></p><p>Think about it.&nbsp; The &quot;bubble&quot; seen in the coin is thicker than the original planchet.&nbsp; If the trappd object was crushable the rollers would have smashed it flat and it would not show as a bubble on the finished coin.&nbsp; If it isn&#039;t crushable it either won&#039;t go through the rollers (creating severe damage to the strip), or does go through but cause damage to the rollers and poke through the outer layers of the coin exposing the object.</p><p><br /></p><p>Take a rock and put it in a lump of clay and then try and roll it out to a thicknes less than that of the rock and you will see what I mean.&nbsp; (Play-Doh is great for doing experiments like this.&nbsp; It is also good for examining how repunchings, doubled dies, and other forms of errors are created.)[/QUOTE]</p><p><br /></p>

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