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<p>[QUOTE=&quot;Info Sponge, post: 695482, member: 20538&quot;]I&#039;ve found out a little more, and it seems to be on the high-tech side.&nbsp; It starts with using an electron beam to etch a pattern, finer than a photographic process could produce, into a special material (&quot;electron beam lithography&quot;).&nbsp;&nbsp; Nickel gets plated or somehow deposited onto the master, to create a nickel shim. Then the nickel piece gets pressed into the coin surface. Since it&#039;s called a shim, I&#039;m guessing it&#039;s put over the regular die.&nbsp; I&#039;m fascinated that you can transfer detail that fine onto normal metal during a striking process. How long do you suppose the shim lasts before it wears out?[/QUOTE]</p><p><br /></p>

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