2011-D Lincoln Shield Cent. Lam

Neat looking anomaly.
I thought damage at first but as crisp and defined as some edges are it's making me doubt it's damage.
Looks like the copper plating came away in areas, like something (grease or dust?) was on the coin before being plated. At some point, it fell or chipped away.

@kimkendall and the others:


kim you are wright technically of the definition and variations of the definition effects.

In this case we have (I can not put the XRF to see exact) an alloy or metal was past over. From the original photo here reposted I choice the most elective part. We see that metal been over the copper plating If was a lamination the core must be see like what we say incuse. Mean under level with the Cu. In this case the white-silver metal we see is raised over the Cu level. this metal must be a very low melting point metal because no traces of Cu heat on borders of the traces.

Hope this theory is the most close of the history of this penny.

Doesn't a laminated coin need heat and tons of pressure as opposed to plaiting which requires electricity and chemicals? Far from my area just thinking out loud.
John1

Thanks everyone. Well when I get home Sunday hopefully my new scale will be there. The one I have jumped off table and broke itself .
I'll pick at it / the area you suggest coop.

Hey Rob, got to this thread late but I posted about a 2006 D 1c a short while back with a similar anomaly and Mike Diamond did respond. I don't think my photos helped Mike make a proper determination as I feel these are mint errors but that's just my opinion.

http://goccf.com/t/390704#3343324

@Rob0411. If you do not care about the value, or considerate that is not a keeper, you can do a small semi destructive test. You need a dilute HCl hydrochloric acid and with a tooth wood pick put a small drop on the white trace. Do not worry about the copper because do not react with this acid. If the trace have Cu under will show up. If not are mean that trace is direct proportional with the core of the coin. Zinc in presence of this acid will have a gas hydrogen evaporate and at the surface will create effervescences. Here the reaction:

Zn + HCl = 2ZnCl2 + H2 explanation from the balancing acids, metals reactions: quote:


If not you need a good XRF 15Watt, 0.3mA with multilayer software and capability to adjust the penetration ray.

Good luck and let us to know the result. Me I will go for destructive test which will let a small hole of.001mm

Theoretical yes. It is possible to have liquid metal solutions, but to apply on different surfaces you need a well equip lab. Also you can clean for example a zinc penny of the Cu with Nitric acid HNO3 with out to damage the zinc core. Some of those sometimes I see on ebay with crazy prices by those "smarts counterfeiters".

I prefers Vecchia Romana but a good Bourbon with a good cheese and nice entourage is a pleasure of the life.

If you are scare do not try. It is the safer way. Me sometimes I put the finger inside the solute acid and test (gustative test) to see if I have the wanted concentration. To commode guy to put the densimeter.

also pay attention of the vapors (gases) from acetone and paint remover (mineral alcohol) those are very, very cancerogenic.