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Why luster on one side but not the other?
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<p>[QUOTE="GDJMSP, post: 2759786, member: 112"]Luster is created by the metal of the planchet coming into contact with the surface of the dies and then flowing across, literally being pushed across, the surface of the dies by pressure during the strike. And the more the metal flows the better, the higher, the quality of the luster. Less flow results in lower quality of luster.</p><p><br /></p><p>So, if the dies are spaced a tiny bit too far apart in the press, or if one is angled a tiny bit, or both are angled a tiny bit, or if the strike pressure is just a bit too low, then the resulting coin will have low or poor quality luster.</p><p><br /></p><p>Also, if any portion or given area of the planchet metal does not come into contact with the surface of the die and flow across it during the strike, there will be no luster in that portion or given area of the coin. This is typically seen in what we describe as weakly struck coins. The areas or portions of the devices that are weakly stuck simply do not have any, or at best very poor quality luster.</p><p><br /></p><p>Given that, luster, once it is created, is by its very nature, fragile. You might even say very fragile. It can be disturbed by even the slightest contact with virtually anything, and it can be broken or even destroyed by more than slight contact, or repeated contact - with virtually anything.</p><p><br /></p><p><br /></p><p><br /></p><p>And that is the result of what I explained above.</p><p><br /></p><p><br /></p><p><br /></p><p>For the same reasons I explained above. Even freshly struck some coins can have better luster on one side than the other, for those reasons. But it is also not at all unusual for one side of a coin to come into repeated contact with something while the other side does not. So a coin like what you have can be because of one thing or a combination of all of those things I described above.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 2759786, member: 112"]Luster is created by the metal of the planchet coming into contact with the surface of the dies and then flowing across, literally being pushed across, the surface of the dies by pressure during the strike. And the more the metal flows the better, the higher, the quality of the luster. Less flow results in lower quality of luster. So, if the dies are spaced a tiny bit too far apart in the press, or if one is angled a tiny bit, or both are angled a tiny bit, or if the strike pressure is just a bit too low, then the resulting coin will have low or poor quality luster. Also, if any portion or given area of the planchet metal does not come into contact with the surface of the die and flow across it during the strike, there will be no luster in that portion or given area of the coin. This is typically seen in what we describe as weakly struck coins. The areas or portions of the devices that are weakly stuck simply do not have any, or at best very poor quality luster. Given that, luster, once it is created, is by its very nature, fragile. You might even say very fragile. It can be disturbed by even the slightest contact with virtually anything, and it can be broken or even destroyed by more than slight contact, or repeated contact - with virtually anything. And that is the result of what I explained above. For the same reasons I explained above. Even freshly struck some coins can have better luster on one side than the other, for those reasons. But it is also not at all unusual for one side of a coin to come into repeated contact with something while the other side does not. So a coin like what you have can be because of one thing or a combination of all of those things I described above.[/QUOTE]
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Why luster on one side but not the other?
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