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<p>[QUOTE=&quot;GDJMSP, post: 700588, member: 112&quot;]As I explained before Kevin, what they call die polish lines are not lines caused by polishing the die. The lines are caused by metal flow.</p><p><br /></p><p>When die is new, the surface of the field areas are very, very smooth - with no lines visible. But as the die is used the metal of the planchets flows across the surface of that smooth die and gradually wears it away. This creates very fine lines in the surface of the die, but only in the fields areas.</p><p><br /></p><p>Now remember, on a die the fields and the protected areas like inside the letters and numbers are the highest points of the die. The areas that stick up the highest. So it is these areas that receive the most metal flow and thus the most lines are worn into those smooth areas by that metal flow.</p><p><br /></p><p>Now when those lines reach a certain point that they are considered to be bothersome or ugly, the die is taken out of the press. It is then polished. The purpose of the polishing is to remove the wear lines caused by the metal flow.</p><p><br /></p><p>So when someone says that coin has die polish lines - that is not what they should be saying. They aren&#039;t die polish lines, those lines are merely the remains of the metal flow lines that were not completely polished out.</p><p><br /></p><p>The polishing removes the lines - it does not cause them. And when you can see some still left, it is only because they didn&#039;t polish them well enough to completely remove them.[/QUOTE]</p><p><br /></p>

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