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How Worn Can A Die Be and Still Strike MS Coins?
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<p>[QUOTE="rmpsrpms, post: 3501967, member: 31773"]You are not wrong, but to be more precise, the planchet metal flows toward the regions of lower pressure, which tend to be the raised devices, and the rim. You can see the effects of this movement on the edges of all devices on an LDS coin. When a coin is VEDS, the edges of devices are sharp where they meet the field, but on LDS these same edges are rounded and show the effects of metal flow wear. At the very outer edge of the coin, the metal indeed flows outward, since it is the lowest pressure way to go. This quickly creates strong wear to the periphery of the die. There are also areas of the die where the flow is "ambiguous". On the Lincoln Wheat Cent, the areas in the field in front of the face, and in a curved region behind the head. Same areas of the Jefferson Nickel show this flow ambiguity. This is the highest pressure region during the strike, where metal flows outward in all directions. Metal inside those regions flows inward toward the bust, while metal outside those regions flows outward toward the rim. Within the ambiguous flow regions, the wear patterns can be "interesting".[/QUOTE]</p><p><br /></p>
[QUOTE="rmpsrpms, post: 3501967, member: 31773"]You are not wrong, but to be more precise, the planchet metal flows toward the regions of lower pressure, which tend to be the raised devices, and the rim. You can see the effects of this movement on the edges of all devices on an LDS coin. When a coin is VEDS, the edges of devices are sharp where they meet the field, but on LDS these same edges are rounded and show the effects of metal flow wear. At the very outer edge of the coin, the metal indeed flows outward, since it is the lowest pressure way to go. This quickly creates strong wear to the periphery of the die. There are also areas of the die where the flow is "ambiguous". On the Lincoln Wheat Cent, the areas in the field in front of the face, and in a curved region behind the head. Same areas of the Jefferson Nickel show this flow ambiguity. This is the highest pressure region during the strike, where metal flows outward in all directions. Metal inside those regions flows inward toward the bust, while metal outside those regions flows outward toward the rim. Within the ambiguous flow regions, the wear patterns can be "interesting".[/QUOTE]
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