1972 Penny - Coin Community Forum

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Author	Replies: 6 / Views: 1,431
aardspeed Pillar of the Community 921 Posts	Posted 04/16/2015 1:35 pm Curious what this depth type ring is near the denticles. Do these lines make any difference? This is an UNC coin & am curious if these make any diff with the value. Report this Post to the Staff

thedollarman Pillar of the Community Canada 4911 Posts	Posted 04/16/2015 1:40 pm your coin appears to be a pl/sp strike. the lines are from the die, sadly that business on the queens face and fields makes this an impaired example. Feel free to call me Will. Edited by thedollarman 04/16/2015 1:43 pm Report this Post to the Staff
SPP-Ottawa Moderator Canada 10458 Posts	Posted 04/16/2015 1:59 pm A PL coin that was cleaned with acetone... you get that 'gasoline-on-water' effect when acetone photochemically reacts with fresh copper. "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
aardspeed Pillar of the Community 921 Posts	Posted 04/16/2015 2:11 pm I picked up a binder with numerous unc. pennies last year & never had it out of the 2x2...If I were to take it out of the 2x2, what would be a good way to see if that comes off the face? I think that gasoline effect is from the 2x2 plastic as a few others have the same... Actually, it may be on the coin as I tried shifting it inside the 2x2 & the gasoline effect is still in the same place....does that change the value? Edited by aardspeed 04/16/2015 2:18 pm Report this Post to the Staff
bpoc1 Rest in Peace United States 4078 Posts	Posted 04/16/2015 3:11 pm Quote: A PL coin that was cleaned with acetone... you get that 'gasoline-on-water' effect when acetone photochemically reacts with fresh copper. I have never heard or read of this. Maybe I'm missing something? Report this Post to the Staff
SPP-Ottawa Moderator Canada 10458 Posts	Posted 04/16/2015 5:40 pm Quote: I have never heard or read of this. Maybe I'm missing something? https://goccf.com/t/154909 "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
aardspeed Pillar of the Community 921 Posts	Posted 04/16/2015 5:50 pm hmmmm, found this: http://www.stonybrook.edu/vescalab/...search7.html "Copper reacts photochemically with acetone and water vapor to form acetic acid. The acetic acid then reacts with copper to form copper acetate. Over a period of 18 hours the copper foil that was immersed in acetone and exposed to ambient light developed blue crystal deposits" ........ http://www.metaldetectingworld.com/...ishing.shtml Edited by aardspeed 04/16/2015 5:52 pm Report this Post to the Staff
	Replies: 6 / Views: 1,431

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