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How Does Verdigris Affect Grading?

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Pillar of the Community

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 Posted 01/03/2016  6:28 pm Show Profile   Bookmark this topic Add LibertyEagle20 to your friends list Get a Link to this Message Number of Subscribers
http://www.ebay.com/itm/1914-D-Linc...AOxyeR9TKhve

I would think the green on the front would give this a details grade. Was this damaged from improper storage after it was stabbed? The way pennies corrode like this make me scared to ever buy an expensive one!
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ChildOfTheWheat's Avatar
United States
5828 Posts
 Posted 01/03/2016  6:39 pm  Show Profile   Bookmark this reply Add ChildOfTheWheat to your friends list Get a Link to this Reply
Very little actuall verdigris, and I think the coin looks lovely. By the way, copper cents (such as wheat) tend not to corrode very easily. However, the current zincolns do corrode SUPER easily.

On a second note, I concur that the owner should have used Verdi-Care before shipping the coin out to PCGS.

On another note, Verdi-Care is made by one of our members, BadThad!
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 Posted 01/03/2016  6:41 pm  Show Profile   Bookmark this reply Add LibertyEagle20 to your friends list Get a Link to this Reply
I must just be super picky. If I even see a speck of green I toss the penny into my cull or light verdigris pile. I love collecting cents but verdigris ruins a lot of coins for me!
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srs77's Avatar
United States
3124 Posts
 Posted 01/03/2016  6:57 pm  Show Profile   Bookmark this reply Add srs77 to your friends list Get a Link to this Reply

Quote:
I must just be super picky. If I even see a speck of green I toss the penny into my cull or light verdigris pile. I love collecting cents but verdigris ruins a lot of coins for me!


Something tells me if you saw this particular coin with verdigris you probably wouldn't toss it into a verdigris pile.. If that's the case can I look at your verdigris pile?
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 Posted 01/03/2016  6:58 pm  Show Profile   Bookmark this reply Add LibertyEagle20 to your friends list Get a Link to this Reply
Heh yeah I have a separate pile that someday I hope to use Verdi-care on. I know I have a 13-s in that pile. No key dates though!
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sel_69l's Avatar
Australia
21786 Posts
 Posted 01/03/2016  9:18 pm  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
A very thin even green patina (which is just a nice way of saying 'mild verdigris'), on an ancient Roman orichalcum sestertii can actually add to eye appeal, and thus value.

The problem is when the bronze disease actually starts to chew into the surface thus causing damage. For a valuable coin in this sort of case, money has to be spent to passivate the verdigris, so that it will not cause any further damage.

In the case of the LWC here, a good treatment according to instructions with VerdiCare is all that is needed.
It would most probably get a 'details' grade, but that is no big deal.
No loss of value.
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BadThad's Avatar
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19945 Posts
 Posted 01/03/2016  10:44 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
As far as grading, it has no effect. If the coin is gradable, then it's all about the amount of wear and eye appeal. If the corrosion is too far gone, the coin will not grade. A light film on a coin this old is something graders don't mind - it clearly demonstrates originality.

One should never rush out and seek a magic solution without taking a lot of things into consideration. Proper conservation should be a calculated process. I appreciate the mentions of VC but I don't want people to read this thread and just jump-out and buy it. Conservation should be taken seriously as we are but curators for the future. Often, a crusty, dirty old coin is what we collectors like!
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https://verdi.care/
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BadThad's Avatar
United States
19945 Posts
 Posted 01/04/2016  2:51 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
I wanted to share a coin that's in my collection. While many people would feel that the "stuff" needs to be removed from this coin, which could be done quite easily, I choose to leave the coin just as it is. I simply rinsed the coin with acetone and transferred into an AirTite. I felt (like the TPG's) that the light verdigris will cause no ill-effect over the long term, given the coin is well protected. Plus you can clearly tell that this coin is 100% original and untampered with.

How-Does-Verdigris-Affect-Grading?
How-Does-Verdigris-Affect-Grading?
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https://verdi.care/
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jjwabraham's Avatar
United States
288 Posts
 Posted 01/08/2016  8:18 pm  Show Profile   Bookmark this reply Add jjwabraham to your friends list Get a Link to this Reply
I agree with BadThad in that there are times that the coin shouldn't be touched because quoting an old saying "It is what it is" and adds character to the coin as part of its path into your own hands. With many of us, it is the coin's last stopping point until we pass on.
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