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PVC damage to coin bought at The Coinhouse Auctions?
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<p>[QUOTE="Michael H Webb, post: 5143071, member: 93313"]I have residue issues with all of the isopropanol solutions I've tried, especially those claiming 99% purity. Used 91% Equate isopropanol from Walmart before the pandemic. Now, it leaves too much dissolved residue on coins, so I use 91% isopropanol from HBProChem.</p><p><br /></p><p>The remedy for residue left by isopropanol is to use more isopropanol that does not leave a residue. May use distilled water with only varying degrees of success.</p><p><br /></p><p>Even the purest acetone is guaranteed to be no more than 5 parts sludge per million:</p><p><br /></p><p><img src="https://i.imgur.com/ehYhoeo.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><br /></p><p>It's transported in glass or metal containers. Costs $78 per liter:</p><p><br /></p><p><img src="https://i.imgur.com/8tLhdac.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><br /></p><p>You need to file paperwork with the DEA before shipment. </p><p><br /></p><p>Acetone is cancerous and mutagenic:</p><p><br /></p><p><img src="https://i.imgur.com/kxPviki.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><br /></p><p>Acetone is not repelled by the surface of a coin as are water and alcohol. Once coated with acetone, distilled water or alcohol will bead and run off a coin, leaving the residue-laden acetone.[/QUOTE]</p><p><br /></p>
[QUOTE="Michael H Webb, post: 5143071, member: 93313"]I have residue issues with all of the isopropanol solutions I've tried, especially those claiming 99% purity. Used 91% Equate isopropanol from Walmart before the pandemic. Now, it leaves too much dissolved residue on coins, so I use 91% isopropanol from HBProChem. The remedy for residue left by isopropanol is to use more isopropanol that does not leave a residue. May use distilled water with only varying degrees of success. Even the purest acetone is guaranteed to be no more than 5 parts sludge per million: [IMG]https://i.imgur.com/ehYhoeo.jpg[/IMG] It's transported in glass or metal containers. Costs $78 per liter: [IMG]https://i.imgur.com/8tLhdac.jpg[/IMG] You need to file paperwork with the DEA before shipment. Acetone is cancerous and mutagenic: [IMG]https://i.imgur.com/kxPviki.jpg[/IMG] Acetone is not repelled by the surface of a coin as are water and alcohol. Once coated with acetone, distilled water or alcohol will bead and run off a coin, leaving the residue-laden acetone.[/QUOTE]
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PVC damage to coin bought at The Coinhouse Auctions?
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