What's Up With This Penny (2008) - Coin Community Forum

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Author	Replies: 8 / Views: 1,230
Becky1217 New Member United States 17 Posts	Posted 06/01/2021 6:28 pm There's this lining on the front of the penny. Any idea what it is or what causes it? Report this Post to the Staff

Coinfrog Bedrock of the Community United States 94367 Posts	Posted 06/01/2021 6:31 pm Are you talking about the fingerprint? Please be more specific. to the CCF! Report this Post to the Staff
Becky1217 New Member United States 17 Posts	Posted 06/01/2021 6:46 pm I thought it was a finger print too but I tried to wipe it off with a microfiber cloth and it wouldn't go away. Report this Post to the Staff
merclover Bedrock of the Community United States 10635 Posts	Posted 06/01/2021 6:55 pm Fingerprints leave oils from your skin that can etch the surface on your coin, making them numismatically worthless. On a side note, NEVER clean your coins, even with a microfiber cloth. Report this Post to the Staff
ijn1944 Bedrock of the Community United States 19226 Posts	Posted 06/01/2021 6:57 pm If the fingerprint isn't very recent, it's not coming off. A soak in acetone would have removed it, if done right after the print was applied. Report this Post to the Staff
IsThisAnything Valued Member United States 440 Posts	Posted 06/02/2021 01:35 am Well, Becky, you got the forensics team on this one so I'll just say Report this Post to the Staff
merclover Bedrock of the Community United States 10635 Posts	Posted 06/02/2021 02:14 am to the CCF, Becky! Report this Post to the Staff
Chase007 Pillar of the Community United States 7516 Posts	Posted 06/02/2021 09:13 am Finger prints. to the Community. Report this Post to the Staff
Big-Kingdom Pillar of the Community United States 1667 Posts	Posted 06/02/2021 3:40 pm Skin oils are pH 5.5, neutral is 7, acidic is less than 7, alkali is higher than 7. at 5.5, it's enough if left on the coin surface to etch the fingerprint into the coin. pH 5.5 is somewhere between coffee and Milk neither of which you'd want to have prolonged contact with your coins. Report this Post to the Staff
	Replies: 8 / Views: 1,230

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