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<p>[QUOTE=&quot;cpm9ball, post: 2544363, member: 24633&quot;]Quite often, grease and debris from the machinery will form in the depths of a device. As planchets are continually struck and made into coins, the build-up of grease and debris becomes compacted and very hard. Sometimes it will fall out of the device onto a new planchet where it is then impressed by the hammer die. This is called a strikethrough. Most often, the debris causing the strikethrough will fall out of the coin, but when it remains embedded in the coin, it is called a retained strikethrough.</p><p><br /></p><p>If you search our forums for &quot;grease-filled die&quot; and &quot;strikethrough&quot; or &quot;struck through&quot; you will find many threads on this subject.</p><p><br /></p><p>Chris[/QUOTE]</p><p><br /></p>

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