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<p>[QUOTE="Badger Mint, post: 2306561, member: 42121"]Very nice piece. i picked this one up at a recent CNG auction. <img src="https://cngcoins.com/photos/enlarged/3570585.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p>To answer some of the questions, one mold can make multiple electrotypes before another mold needs to be made. Also, molds can be made from electrotypes as the copy is as perfect as the mold it is made from, I have made a mold from the above coin and made copies from that mold. The filler metal was most likely lead as it is cheap, the trick would be to keep the two halves together while the lead was molten so it wouldn't leak out. I still haven't mastered that part. Molds in the early days of electrotyping were made from pressing a coin or medal into lead or using a low temp fuseable metal alloy. Later on it was found that using plaster, wax, or natural rubber was possible if the mold was coated with a conductive powder or metal foil. With proper care, the molds shouldn't degrade. According to the old books, using their primative batteries, it could take several days to make some electrotypes. Using a modern, controllable power supply, I can make an electrotype that is thick enough to take the tin filling (I don't use lead) in about 8 hours. If you find more out about Robert Ready, please post!</p><p><br /></p><p>Joe Paonessa[/QUOTE]</p><p><br /></p>
[QUOTE="Badger Mint, post: 2306561, member: 42121"]Very nice piece. i picked this one up at a recent CNG auction. [IMG]https://cngcoins.com/photos/enlarged/3570585.jpg[/IMG] To answer some of the questions, one mold can make multiple electrotypes before another mold needs to be made. Also, molds can be made from electrotypes as the copy is as perfect as the mold it is made from, I have made a mold from the above coin and made copies from that mold. The filler metal was most likely lead as it is cheap, the trick would be to keep the two halves together while the lead was molten so it wouldn't leak out. I still haven't mastered that part. Molds in the early days of electrotyping were made from pressing a coin or medal into lead or using a low temp fuseable metal alloy. Later on it was found that using plaster, wax, or natural rubber was possible if the mold was coated with a conductive powder or metal foil. With proper care, the molds shouldn't degrade. According to the old books, using their primative batteries, it could take several days to make some electrotypes. Using a modern, controllable power supply, I can make an electrotype that is thick enough to take the tin filling (I don't use lead) in about 8 hours. If you find more out about Robert Ready, please post! Joe Paonessa[/QUOTE]
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