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<p>[QUOTE=&quot;TubeRider, post: 2294032, member: 76481&quot;]I&#039;ll pay in advance for the book!</p><p>I have heard, and I think it was mentioned in this thread, that people can actually AT coins in slabs?&nbsp; I know the slabs are not air tight but how in the world do they pull that off and control the reaction?&nbsp; To break up the blast white monotony I like the occasional nicely toned coin (not clown colors) but how do I know that sulphur or some other chemical hasn&#039;t been introduced <i>into</i> the slab?&nbsp; The coin could look awesome at purchase but with the chemicals present <i>in the slab</i> it seems that the reaction will continue at an accelerated rate resulting in a black coin not too far down the road.[/QUOTE]</p><p><br /></p>

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