Proof 1970-S Washington Quarter Coin Problem. Need Help - Page 2

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Author	Replies: 19 / Views: 1,650	Page: of 2

dsking Pillar of the Community United States 2365 Posts	Posted 05/14/2023 3:04 pm Milk spot origins: Quote: The blanks are heated and cooled (a process called annealing) to stop the silver becoming too brittle. But the fatal process happens before annealing when it's being cleaned and degreased with solvents. Sometimes not all of the solvents are removed before the blank's heated, sneakily imprinting imperfections into the silver. The newly minted coin may look perfect, but the leftover solvent goes undetected and, as time passes, starts to show. Report this Post to the Staff
SaturnD51 Valued Member United States 425 Posts	Posted 05/14/2023 10:02 pm Definitely improper storage of the coins. Humidity will fog up the coins as well as not sealed properly. Must have a dehumidifier on in the room where your coins are stored. Just set it and forget it. one to one and a half years will fog them up. If you soak them to remove fogging do not touch with any cloth. Especially a proof coin because it will put hairline scratches on coin. I guess it you are not selling the coin and saving it would be o.k. Boy when I sent coins to ANACS there conservation on a coin took all the milk spots and fogging off. They used to only have one charge for conserving all the coins. Do not know if they changed that.Good luck anyway on what you do. We always want to keep our coins safe. You can always throw dry lock packets in with the coins you save. This helps too. Edited by SaturnD51 05/14/2023 10:03 pm Report this Post to the Staff
coincrew1000 Valued Member United States 71 Posts	Posted 05/15/2023 09:41 am not grading them. they just need to look good. Report this Post to the Staff
jbuck Moderator United States 189222 Posts	Posted 05/15/2023 10:15 am It may not be perfect, but still looks better than it did. Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
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