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Is it true that cleaning a coin removes a surface film?
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<p>[QUOTE="Insider, post: 7682768, member: 24314"]<span style="color: #660066">Gam3rBlake, posted: "I was at my LCS today and the owner and I were discussing <b>improperly </b>cleaned coins.</span></p><p><span style="color: #660066"><br /></span></p><p><span style="color: #660066">He told me recognizing cleaned coins can be difficult <b><i>at first</i></b> but that it gets easier with practice.</span></p><p><br /></p><p><i><span style="color: #b30000">True</span>. If you learn to tip a coin and turn it at the same time through the light (correct examination) so that you learn what an ORIGINAL SURFACE should look like FOR ALL GRADES (including circulated) it becomes easy to detect improper cleaning. I have found that a very large number of collectors cannot tell. With proper instruction anyone with an "eye-for-detail" can learn quickly. Women are usually better at it then men. To illustrate this, I tell my grading students that a woman can walk into a room and quickly spot a cigar butt next to the floorboard BEHIND the couch!</i> </p><p><br /></p><p><span style="color: #660066">I told him that I could never identify cleaned coins and he said that when a coin is cleaned <i>improperly </i>there is a very very thin surface film of mint luster that is removed which will change a coin’s luster and that there is no way to repair or replace it (aside from melting the coin down and reminting it).</span></p><p><br /></p><p><i>He is possibly using an uncirculated coin as an example. Low grade coin do not have any original mint luster remaining. Improper cleaning does change the surface. However, proper cleaning (conservation <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" />) also changes the surface.</i> </p><p><br /></p><p><span style="color: #660066">"I'm trying to learn to identify cleaned coins <b>for when</b> I start buying raw coins." </span></p><p><span style="color: #660066"><br /></span></p><p><span style="color: #000000"><i>"For when" should be a long time. Best to wait. Since you also collect ancients, most of them will be "raw" anyway.</i></span> </p><p><br /></p><p><i>PS Since very many coins have been cleaned at sometime, you'll need to learn when improper cleaning is "market acceptable" for the TPGS's. </i>[/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 7682768, member: 24314"][COLOR=#660066]Gam3rBlake, posted: "I was at my LCS today and the owner and I were discussing [B]improperly [/B]cleaned coins. He told me recognizing cleaned coins can be difficult [B][I]at first[/I][/B] but that it gets easier with practice.[/COLOR] [I][COLOR=#b30000]True[/COLOR]. If you learn to tip a coin and turn it at the same time through the light (correct examination) so that you learn what an ORIGINAL SURFACE should look like FOR ALL GRADES (including circulated) it becomes easy to detect improper cleaning. I have found that a very large number of collectors cannot tell. With proper instruction anyone with an "eye-for-detail" can learn quickly. Women are usually better at it then men. To illustrate this, I tell my grading students that a woman can walk into a room and quickly spot a cigar butt next to the floorboard BEHIND the couch![/I] [COLOR=#660066]I told him that I could never identify cleaned coins and he said that when a coin is cleaned [I]improperly [/I]there is a very very thin surface film of mint luster that is removed which will change a coin’s luster and that there is no way to repair or replace it (aside from melting the coin down and reminting it).[/COLOR] [I]He is possibly using an uncirculated coin as an example. Low grade coin do not have any original mint luster remaining. Improper cleaning does change the surface. However, proper cleaning (conservation :D) also changes the surface.[/I] [COLOR=#660066]"I'm trying to learn to identify cleaned coins [B]for when[/B] I start buying raw coins." [/COLOR] [COLOR=#000000][I]"For when" should be a long time. Best to wait. Since you also collect ancients, most of them will be "raw" anyway.[/I][/COLOR] [I]PS Since very many coins have been cleaned at sometime, you'll need to learn when improper cleaning is "market acceptable" for the TPGS's. [/I][/QUOTE]
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