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Would coin struck through water look like one struck through oil/grease?
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<p>[QUOTE="GDJMSP, post: 2762623, member: 112"]My only point regarding the water dissipating, if it dissipates at all, is that it is not caused by heat generated as the result a coin being struck. Yes, water evaporates at low temperatures, but that takes time. And a coin being struck takes but a fraction of a second. Even if a coin is hammer struck it only takes a fraction of second, and presses are of course much faster. And water cannot evaporate in a fraction of second, unless there is extreme heat. And striking a coin does not generate extreme heat. As I said, a struck coin, even by a modern press, is only warm to the touch, even immediately after the strike.</p><p><br /></p><p>I'm saying this because some people think the metal flows when a coin is struck because of heat produced during the strike. Some even think that the metal melts and that's why it flows. But this not true, the metal flows because of pressure - not heat. And the only heat that is produced by a strike is because of the planchet metal flowing against the die metal, and itself. It is the friction of the 1 metal flowing across the other, as well as itself, that generates what heat is produced. And that heat is minimal.</p><p><br /></p><p>This is easily proved because when you hammer strike a coin enough pressure can be exerted to perfectly form the coin, but you can immediately grasp that coin in your bare fingers and remove it from the anvil die and it will feel no more than slightly warm to the touch. And yeah, I have actually done it. So have many children at many coin shows. Children have even been to hold a press struck coin in their bare hands immediately after it was struck. And if there was excessive heat produced, this would not be possible.</p><p><br /></p><p>Now some may argue and say that the heat can be generated very quickly, and it yes it can, there's no doubt of that. But what cannot be argued is that that heat will dissipate just quickly. For heat to dissipate in metal takes a while. So if there was any amount of heat to speak of generated by a coin being struck, the coin would still be hot immediately after being struck. However they are not hot. Millions upon millions of hammer struck coins were removed from the anvil dies immediately after being struck with bare hands. And if they were hot that could not be done. Therefore there is no heat of any consequence generated by the strike.</p><p><br /></p><p>And, some may argue and say that modern presses produce more pressure so there is more heat. But they don't produce more pressure, and i'm not saying they can't, I'm saying they don't. The pressure is set at what it takes to do the job. With any metal it takes a given amount of pressure to form the coin, regardless of the strike method. And if a coin is well struck then obviously enough pressure is created.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 2762623, member: 112"]My only point regarding the water dissipating, if it dissipates at all, is that it is not caused by heat generated as the result a coin being struck. Yes, water evaporates at low temperatures, but that takes time. And a coin being struck takes but a fraction of a second. Even if a coin is hammer struck it only takes a fraction of second, and presses are of course much faster. And water cannot evaporate in a fraction of second, unless there is extreme heat. And striking a coin does not generate extreme heat. As I said, a struck coin, even by a modern press, is only warm to the touch, even immediately after the strike. I'm saying this because some people think the metal flows when a coin is struck because of heat produced during the strike. Some even think that the metal melts and that's why it flows. But this not true, the metal flows because of pressure - not heat. And the only heat that is produced by a strike is because of the planchet metal flowing against the die metal, and itself. It is the friction of the 1 metal flowing across the other, as well as itself, that generates what heat is produced. And that heat is minimal. This is easily proved because when you hammer strike a coin enough pressure can be exerted to perfectly form the coin, but you can immediately grasp that coin in your bare fingers and remove it from the anvil die and it will feel no more than slightly warm to the touch. And yeah, I have actually done it. So have many children at many coin shows. Children have even been to hold a press struck coin in their bare hands immediately after it was struck. And if there was excessive heat produced, this would not be possible. Now some may argue and say that the heat can be generated very quickly, and it yes it can, there's no doubt of that. But what cannot be argued is that that heat will dissipate just quickly. For heat to dissipate in metal takes a while. So if there was any amount of heat to speak of generated by a coin being struck, the coin would still be hot immediately after being struck. However they are not hot. Millions upon millions of hammer struck coins were removed from the anvil dies immediately after being struck with bare hands. And if they were hot that could not be done. Therefore there is no heat of any consequence generated by the strike. And, some may argue and say that modern presses produce more pressure so there is more heat. But they don't produce more pressure, and i'm not saying they can't, I'm saying they don't. The pressure is set at what it takes to do the job. With any metal it takes a given amount of pressure to form the coin, regardless of the strike method. And if a coin is well struck then obviously enough pressure is created.[/QUOTE]
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Would coin struck through water look like one struck through oil/grease?
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