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<p>[QUOTE=&quot;alurid, post: 4297115, member: 81991&quot;]It is a misnomer to say that the line seen on a business strike coin is caused by Die Polishing when they are in fact caused by Die Cleaning.</p><p>Coin dies are polished to remove scratches in the surface of a die in order to produce a proof-like coin. It is a very skilled and time consuming process.</p><p><br /></p><p>Die Cleaning is an action done to the dies while they are in service to remove debris so the dies can produce a better looking coin. This is a very aggressive action that uses course grit sanding that can in turn leaves lines scratched into the dies. This action also can change the depth or relief of the die.</p><p><br /></p><p>The relief reduction that you notice on a coin is caused from die wear and or die cleaning. The face of the coin die get worn away from these actions. Coin dies that are used for business strike are not polished. That action is reserved for dies that strike proof coins.[/QUOTE]</p><p><br /></p>

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