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<p>[QUOTE="Just Carl, post: 123898, member: 4552"]Dip in concentrated Nitric Acid. If not available, try Hydrochloric Acid. No more marks, no more darkening, no more coin. :whistle: </p><p>Anyway as long as they are not the valuable coins what you can do is to make a slight solution of baking soda and water and put the coins in there for a while. Don't rub, just let soak. If that dosen't work, try Acetone. Let it soak in Acetone for a few days. If all fails, don't worry about it. </p><p>The reason for what you see is that when Whitman or any of these cheap, push into a slot type of album is made, the method of construction is that a sheet of material is completely covered with glue. The slotted page is then just layed on top of this glued sheet. When all dried the back of the slots has a slight amount of this glue still there. This is actually used by some when a coin is to small from wear to stay in the slot and falls out. Then the back of the coin is wetted and put in the slot where it meets the glue and now the coin is basically glue in. The reason there are sort of stripes is the method the glue was put down on the original sheet. With Whitman it was done with a sweeping motion. Others just poured it on. Some sprayed the goue on. Regarless, always instruct young kids not to use those if they value the coins.[/QUOTE]</p><p><br /></p>
[QUOTE="Just Carl, post: 123898, member: 4552"]Dip in concentrated Nitric Acid. If not available, try Hydrochloric Acid. No more marks, no more darkening, no more coin. :whistle: Anyway as long as they are not the valuable coins what you can do is to make a slight solution of baking soda and water and put the coins in there for a while. Don't rub, just let soak. If that dosen't work, try Acetone. Let it soak in Acetone for a few days. If all fails, don't worry about it. The reason for what you see is that when Whitman or any of these cheap, push into a slot type of album is made, the method of construction is that a sheet of material is completely covered with glue. The slotted page is then just layed on top of this glued sheet. When all dried the back of the slots has a slight amount of this glue still there. This is actually used by some when a coin is to small from wear to stay in the slot and falls out. Then the back of the coin is wetted and put in the slot where it meets the glue and now the coin is basically glue in. The reason there are sort of stripes is the method the glue was put down on the original sheet. With Whitman it was done with a sweeping motion. Others just poured it on. Some sprayed the goue on. Regarless, always instruct young kids not to use those if they value the coins.[/QUOTE]
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