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<p>[QUOTE="GSDykes, post: 4023610, member: 73321"]A brief selection from <a href="http://www.buriedtreasurehunter.co" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.buriedtreasurehunter.co" rel="nofollow">www.buriedtreasurehunter.co</a></p><p><br /></p><p>"There are a range of oils or solutions that can be used or made up which I will list shortly but let’s first discuss why it works.</p><p><br /></p><p>The oils and solutions work because they are acidic in nature and <img src="https://buriedtreasurehunter.co.uk/wp-content/uploads/2018/09/clean-coin1.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />will gradually break down, soften and remove corrosion or verdigris. Some oils and solutions are more acidic than others so in some cases you could leave a coin in a solution for a couple of days and in other cases you may only want to leave it for a few hours. Soaking is a slow process and sometimes may take weeks! Regular checking is the key because if you forget about it, there’s no going back!</p><p><br /></p><p>What works is the acidic fatty acids and they do the work but it must be remembered that even though it’s mild and slow acting, it is corrosive and they can eventually etch into a coin or artefact if left unchecked or unwashed and neutralised afterwards.</p><p><br /></p><p>It can be helpful from time to time to check on items being soaked and help it along by removing it and gently working a wooden toothpick or wooden sweetcorn skewer into it to remove any larger deposits before returning it to the solution.</p><p><br /></p><p>(I recently saw the huge difference soaking had made to a silver coin found on a club site. Quite a rare Oliver Cromwell Commonwealth Half Crown in fact!)." END</p><p><br /></p><p>Again experiment with low value items,</p><p>Gary in Washington[/QUOTE]</p><p><br /></p>
[QUOTE="GSDykes, post: 4023610, member: 73321"]A brief selection from [URL="http://www.buriedtreasurehunter.co"]www.buriedtreasurehunter.co[/URL] "There are a range of oils or solutions that can be used or made up which I will list shortly but let’s first discuss why it works. The oils and solutions work because they are acidic in nature and [IMG]https://buriedtreasurehunter.co.uk/wp-content/uploads/2018/09/clean-coin1.jpg[/IMG]will gradually break down, soften and remove corrosion or verdigris. Some oils and solutions are more acidic than others so in some cases you could leave a coin in a solution for a couple of days and in other cases you may only want to leave it for a few hours. Soaking is a slow process and sometimes may take weeks! Regular checking is the key because if you forget about it, there’s no going back! What works is the acidic fatty acids and they do the work but it must be remembered that even though it’s mild and slow acting, it is corrosive and they can eventually etch into a coin or artefact if left unchecked or unwashed and neutralised afterwards. It can be helpful from time to time to check on items being soaked and help it along by removing it and gently working a wooden toothpick or wooden sweetcorn skewer into it to remove any larger deposits before returning it to the solution. (I recently saw the huge difference soaking had made to a silver coin found on a club site. Quite a rare Oliver Cromwell Commonwealth Half Crown in fact!)." END Again experiment with low value items, Gary in Washington[/QUOTE]
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