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<p>[QUOTE=&quot;Conder101, post: 3223285, member: 66&quot;]Lamination errors can also result from trapped gas bubbles in the melt, so single metal, non-alloyed coins CAN have laminations as well.&nbsp; Molten metal often has dissolved gases in it, so once the melt is liquid it is kept that way for a little while to allow the gases to come out of solution.&nbsp; Also if the melt temperature is too high you can have some volitaization of the metal that creates bubbled (as when water boils)&nbsp; This is less of a problem today than it used to be because they have better temperature control, and the inductions furnaces set up convection cells in the melt which help to release dissolve gases.&nbsp; But it IS possible for the zinc core to have a lamination[/QUOTE]</p><p><br /></p>

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