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Proof of principle: removing iron oxides from silver coins
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<p>[QUOTE="dougsmit, post: 7465897, member: 19463"]In this case, my opinion is that you spent €8 and some amount on chemicals to improve a coin which was absolutely terrible making it worth little more than €8 considering the eroded surfaces.</p><p><br /></p><p>The problem here may be that the coin in question was less than 50% silver so we lost a bit of original alloy along with the deposits that needed to go. Certainly the coin was improved in the process but I would suggest it was worth more as an educational experience than as a way of freeing this particular coin. What you learned applied to a very rare coin of the period would most certainly be worth the chemicals and effort. If you just wanted a denarius of Severus Alexander, there are easier answers. Of course finding someone willing to sell a Pertinax etc. for €8 might be difficult but when you do find that coin, you will be ready for it. That is great; thanks for sharing!</p><p><br /></p><p><br /></p><p>Certainly true! All ancient coins have been cleaned. The ones that have an inch of dirt on them previously had at least two inches of dirt. If there is a sin involved in cleaning ancient coins, I might suggest that it is telling people to soak coins in olive oil. Actually that is just one of the sins we see. Somewhere else here on CT today we were shown a Gallienus Provincial that was scrubbed with a sharp pointy object and called 'smoothed'. Every so often we are treated to coins that are electrocuted, tumbled or burned with a torch. Cleaning ancient coins is not a sin but doing so without the slightest idea what you are doing is just a bit sinful and has wrecked quite a few coins in most of our collections. I wish I had the shills of Roerbakmix in particular in the ability to diagnose 'patients' before making them 'vicitms'.</p><p><br /></p><p><br /></p><p>I hope everyone read that line.[/QUOTE]</p><p><br /></p>
[QUOTE="dougsmit, post: 7465897, member: 19463"]In this case, my opinion is that you spent €8 and some amount on chemicals to improve a coin which was absolutely terrible making it worth little more than €8 considering the eroded surfaces. The problem here may be that the coin in question was less than 50% silver so we lost a bit of original alloy along with the deposits that needed to go. Certainly the coin was improved in the process but I would suggest it was worth more as an educational experience than as a way of freeing this particular coin. What you learned applied to a very rare coin of the period would most certainly be worth the chemicals and effort. If you just wanted a denarius of Severus Alexander, there are easier answers. Of course finding someone willing to sell a Pertinax etc. for €8 might be difficult but when you do find that coin, you will be ready for it. That is great; thanks for sharing! Certainly true! All ancient coins have been cleaned. The ones that have an inch of dirt on them previously had at least two inches of dirt. If there is a sin involved in cleaning ancient coins, I might suggest that it is telling people to soak coins in olive oil. Actually that is just one of the sins we see. Somewhere else here on CT today we were shown a Gallienus Provincial that was scrubbed with a sharp pointy object and called 'smoothed'. Every so often we are treated to coins that are electrocuted, tumbled or burned with a torch. Cleaning ancient coins is not a sin but doing so without the slightest idea what you are doing is just a bit sinful and has wrecked quite a few coins in most of our collections. I wish I had the shills of Roerbakmix in particular in the ability to diagnose 'patients' before making them 'vicitms'. I hope everyone read that line.[/QUOTE]
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Proof of principle: removing iron oxides from silver coins
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