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<p>[QUOTE="NorthKorea, post: 2487700, member: 29643"]Okay, here's the easiest way to answer this:</p><p><br /></p><p>If you had a fully sealed environment containing the acetone, you could leave the coin in it "forever" without causing problems. The problem occurs with the acetone evaporating. If it evaporates, any contaminants that dissolved into the acetone would possibly be redeposited onto the coin surface. So, the goal is to get the coin out before more than half of the acetone has evaporated. Once you're ready to transfer the coin from the bath, have a second bath with acetone prepared. As you put the coin into the second bath, give it a swish to have the particulates dissolve into the "new" bath. At this point, I personally do something dumb and I rinse the coin in distilled water before air drying it. This is mainly because I don't want the acetone evaporating on the surface of the coin. Chemistry actually says not to do this, as you're rehydrating the surface, but it's my personal method. After it air dries for 24 hrs, I place the coin into a mylar flip. Again, not actually the right way, but how I do it.</p><p><br /></p><p>Others may recommend a third acetone bath to remove any remnants of whatever organic material, with a quick dab dry of each side then back into the storage. That's fine too.</p><p><br /></p><p>Things you want to avoid until you actually have some practice with it:</p><p><br /></p><p>1) Physical manipulation of things on the surface. This includes using Q-Tips, rose thorns, toothpicks, etc. It also includes rubbing the surface with anything.</p><p><br /></p><p>2) Spot cleaning.</p><p><br /></p><p>3) Surface color blending.</p><p><br /></p><p>Basically, treat the coin how you would a wine stain on your rug. Try to get it out, but not at the expense of destroying the rug or leaving a huge white spot in the middle of cream colored rug.[/QUOTE]</p><p><br /></p>
[QUOTE="NorthKorea, post: 2487700, member: 29643"]Okay, here's the easiest way to answer this: If you had a fully sealed environment containing the acetone, you could leave the coin in it "forever" without causing problems. The problem occurs with the acetone evaporating. If it evaporates, any contaminants that dissolved into the acetone would possibly be redeposited onto the coin surface. So, the goal is to get the coin out before more than half of the acetone has evaporated. Once you're ready to transfer the coin from the bath, have a second bath with acetone prepared. As you put the coin into the second bath, give it a swish to have the particulates dissolve into the "new" bath. At this point, I personally do something dumb and I rinse the coin in distilled water before air drying it. This is mainly because I don't want the acetone evaporating on the surface of the coin. Chemistry actually says not to do this, as you're rehydrating the surface, but it's my personal method. After it air dries for 24 hrs, I place the coin into a mylar flip. Again, not actually the right way, but how I do it. Others may recommend a third acetone bath to remove any remnants of whatever organic material, with a quick dab dry of each side then back into the storage. That's fine too. Things you want to avoid until you actually have some practice with it: 1) Physical manipulation of things on the surface. This includes using Q-Tips, rose thorns, toothpicks, etc. It also includes rubbing the surface with anything. 2) Spot cleaning. 3) Surface color blending. Basically, treat the coin how you would a wine stain on your rug. Try to get it out, but not at the expense of destroying the rug or leaving a huge white spot in the middle of cream colored rug.[/QUOTE]
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