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 Replies: 16 / Views: 3,728 |
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New Member
Canada
48 Posts |
I have two specific questions about cleaning pennies. (I already soaked both groups of pennies in acetone for 10 days with little improvement). 1. In the first case I'm wondering if its possible to remove the green crud on the copper. Must be some kind of chemical reaction. Not sure what its called... 2. In the second case, I'm wondering if its possible to remove this kind of heavy dirt and grime. Any insight would be appreciated. Thanks!   |
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Moderator
 United States
188194 Posts |
For reference, look at Bad Thad's polarity ladder. It is likely that Verdi-care will be needed to rescue these. You will have to ask yourself if they are worth the expense (time and money). |
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Bedrock of the Community
United States
94367 Posts |
Good advice on both counts. Even removing the verdigris will likely leave a different sort of discoloration underneath.  to the CCF! |
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Rest in Peace
10197 Posts |
Once a coin has received staining it is virtually impossible to reclaim it without stripping the surface layer that is damaged away...yep, you read that right. The advice given is quite appropriate, these are common coins worth face value, unless some weird variety, but the expense and effort is wasted. Seek better examples CRH or even purchasing would be more cost effective.  Do I see a "science experiment" in the future?  Edited by Crazyb0
01/11/2018 1:50 pm
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Pillar of the Community
United States
6130 Posts |
 These are, at best, "science experiment" coins. They never had much or any numismatic value, and all that went out the window when they became like this. If you want to try to treat then for the fun and education of it, verdicare might help. You could also toss them in some vinegar and see what happens, or melt them into a big blob of metal, then cast that metal into a HUGE mold designed after a penny, that you engraved yourself. |
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Moderator
United States
188194 Posts |
Of course, if anyone obtains value in doing experiments, then by all means do it.  |
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Rest in Peace
United States
18456 Posts |
I'm afraid your goose is cooked . most of those small cents have a corrosion problem . Verdi-Care will not remove corrosion .  |
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Rest in Peace
United States
17900 Posts |
They are dead. Do not resuscitate.
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Moderator
United States
15414 Posts |
These are corroded beyond any reasonable hope of restoring numismatic value ... which was minimal to begin with. Politely suggest you move on ... spend them all. Take a look at my other hobby ... http://www.jk-dk.art |
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Bedrock of the Community
United States
94367 Posts |
Yep. |
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New Member
 Canada
48 Posts |
Will this green corrosion spread to other good quality coins if they are stacked together in a roll?
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Bedrock of the Community
United States
20753 Posts |
IF your not worried about their value and since not worth a lot of money, why not just spend some time with soap, water, tooth type brush. Just remember that regardless of if you git all that stuff off, there will be damaged areas beyond repair. Yes, they may look a bit better but then only slightly. Also, try some baking soda and water paste with a toothbrush. If all that fails, go to auto parts store and buy some H2SO4 used in car batteries. It will melt almost all of the Copper and leave you with some really nice looking Blue Crystals.  |
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Bedrock of the Community
United States
19943 Posts |
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Bedrock of the Community
United States
19943 Posts |
Quote:
Verdi-Care will not remove corrosion . WRONG! |
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New Member
Canada
48 Posts |
I put some of my pennies in vinegar and the verdigris went away very quickly, within moments it faded! Good to know that verdigris can spread. Thanks for the pics.
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Bedrock of the Community
United States
19943 Posts |
Yes, any acid will remove verdigris. However, it also attacks the metal leaving a dull and lifeless coin.
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Replies: 16 / Views: 3,728 |
Posted 01/11/2018 1:43 pm
