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<p>[QUOTE="Conder101, post: 106061, member: 66"]You're on the right track but the discription is wrong. First the Master Hub is created by the reducing lathe from the Galvano or epoxy model. After it's creation it is hardened and then it is NEVER re-annealed. (Annealing is a heat treating then slow controled cooling to soften a piece of metal, not to harden it.) The creation steps then are Master Hub creates Master Die, Master Die creates Working Hubs, and Working hubs creates Working Dies. While the distortion could happen at any of those steps Lets just assume it was the last stage the creation of the working die.* Now there is an understanding problem caused by the name of the doubling class. It is called Distorted Hub Doubling but the distortion does not occur in the hub. It occurs in the working die which as you say does not return to quite the same dimensions during the annealing (softening) process that hit had at the end of the first hubbing. Then when it gets the second hubbing, the images don't quite match up in various areas. In this case it shows hub doubling from distortion.</p><p><br /></p><p>There is another class of hub doubling where the doubling DOES come from a distorted hub and that is worn hub doubling. In that case whil the die is being annealed, the hub is used to create many more dies before the first one returns. All of that hubbing wears out the hub and causes the details to spread out slightly from their original positions. So now when it is used for the second hubbing the details on the hub are in a slightly different position and the result is a "smearing" of the details with letters having extra thickness. This spread is strongest around the outer borders and radiates out from the center of the coin. It is also usually even all around the coin. (Distorted Hub Doubling may show in only one area, or in random areas around the coin depending on how the die distorted during annealing.) This type of hub doubling doesn't show spliting of the serifs.</p><p><br /></p><p>*If the distortion took place other than on the working die the proper way to describe it would probalby be Distorted Master Die doubling, Distorted Working Hub doubling, and then finally Distorted hub doubling where it means that the die shows hub doublig and that doubling was due to distortion, not that the hub that did the die was distorted.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 106061, member: 66"]You're on the right track but the discription is wrong. First the Master Hub is created by the reducing lathe from the Galvano or epoxy model. After it's creation it is hardened and then it is NEVER re-annealed. (Annealing is a heat treating then slow controled cooling to soften a piece of metal, not to harden it.) The creation steps then are Master Hub creates Master Die, Master Die creates Working Hubs, and Working hubs creates Working Dies. While the distortion could happen at any of those steps Lets just assume it was the last stage the creation of the working die.* Now there is an understanding problem caused by the name of the doubling class. It is called Distorted Hub Doubling but the distortion does not occur in the hub. It occurs in the working die which as you say does not return to quite the same dimensions during the annealing (softening) process that hit had at the end of the first hubbing. Then when it gets the second hubbing, the images don't quite match up in various areas. In this case it shows hub doubling from distortion. There is another class of hub doubling where the doubling DOES come from a distorted hub and that is worn hub doubling. In that case whil the die is being annealed, the hub is used to create many more dies before the first one returns. All of that hubbing wears out the hub and causes the details to spread out slightly from their original positions. So now when it is used for the second hubbing the details on the hub are in a slightly different position and the result is a "smearing" of the details with letters having extra thickness. This spread is strongest around the outer borders and radiates out from the center of the coin. It is also usually even all around the coin. (Distorted Hub Doubling may show in only one area, or in random areas around the coin depending on how the die distorted during annealing.) This type of hub doubling doesn't show spliting of the serifs. *If the distortion took place other than on the working die the proper way to describe it would probalby be Distorted Master Die doubling, Distorted Working Hub doubling, and then finally Distorted hub doubling where it means that the die shows hub doublig and that doubling was due to distortion, not that the hub that did the die was distorted.[/QUOTE]
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