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Cud and die cracks..is this uncommon?
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<p>[QUOTE="GDJMSP, post: 1417587, member: 112"]Every die is polished before it's ever used. Of course we're talking about modern coins, milled coins, machined coins, not hammered coins. But even some hammer type dies were polished, depending on dates. </p><p><br /></p><p>The other die polishing your talking about is done after the die is used, often well used, but not always. Previously used dies are typically polished for 1 of 2 reasons, a die clash, or wear. Die clashes are obvious reasons, you don't want part of the design from the obv showing up on the rev and vice versa. So the die is polished to remove those partial designs. </p><p><br /></p><p>With wear it's a bit different, and not what most folks would think of when they think of wear. The wear you are trying to remove on a die comes from metal flow. For as the metal of the coin flows across the surface of the die that friction between the 2 metals creates lines in the surface of the die, in the fields. So once a die becomes worn to a certain point it is polished to remove those lines from the fields so that the die can again mint coins as they are supposed to be.</p><p><br /></p><p>And die polishing is not what a lot of people think it is. When a die is polished the only part of the die that is touched are the fields. There is no polishing of the devices (the recesses in the die) - ever - because it can't be done. Polishing is only ever done on the fields, new dies and used dies.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 1417587, member: 112"]Every die is polished before it's ever used. Of course we're talking about modern coins, milled coins, machined coins, not hammered coins. But even some hammer type dies were polished, depending on dates. The other die polishing your talking about is done after the die is used, often well used, but not always. Previously used dies are typically polished for 1 of 2 reasons, a die clash, or wear. Die clashes are obvious reasons, you don't want part of the design from the obv showing up on the rev and vice versa. So the die is polished to remove those partial designs. With wear it's a bit different, and not what most folks would think of when they think of wear. The wear you are trying to remove on a die comes from metal flow. For as the metal of the coin flows across the surface of the die that friction between the 2 metals creates lines in the surface of the die, in the fields. So once a die becomes worn to a certain point it is polished to remove those lines from the fields so that the die can again mint coins as they are supposed to be. And die polishing is not what a lot of people think it is. When a die is polished the only part of the die that is touched are the fields. There is no polishing of the devices (the recesses in the die) - ever - because it can't be done. Polishing is only ever done on the fields, new dies and used dies.[/QUOTE]
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Cud and die cracks..is this uncommon?
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