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2004 Lincoln Memorial Cent: Check This Out Someone Different

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Pillar of the Community
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United States
1529 Posts
 Posted 01/28/2022  3:53 pm  Show Profile   Bookmark this reply Add Cujohn to your friends list Get a Link to this Reply
These are the 95s along with 25 or more that came out of string rolls.

Mine are not as smooth as Kpierce's are, but the same problem. I think it has something to do with when they were electroplated, maybe there was something on the planchet that wouldn't let the copper adhere
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Canada
2852 Posts
 Posted 01/28/2022  5:04 pm  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
In the process's of plating the zinc it is not use the C101 Oxygen Free Copper which it is compact. The plating in the fabrication of the coins will result in an porous cooper layout. The zinc core, oxide very fast given an white-grey oxide which I see on the Cujon coins and has a normal Cu surface color. The OP coin color it is more versus a toning color and could be obtain relative easy on this color form.
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4465 Posts
 Posted 01/28/2022  8:27 pm  Show Profile   Check tropicalbats's eBay Listings Bookmark this reply Add tropicalbats to your friends list Get a Link to this Reply
Wow, look a the uniformity of shape on the reverse of Cujohn's coins. That has to be an indicator as to how these form.
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Canada
2852 Posts
 Posted 01/28/2022  9:51 pm  Show Profile   Bookmark this reply Add silviosi to your friends list Get a Link to this Reply
Yes this phenomena usually is bigger on the Observe due to the action of the Hammer. When is strike down, the Oxygen contain in the alloy will has the tendency to rise up, forming more oxygen molecular concentration on this part, so the oxidation will occur faster on this side of the coin. Like I mention before the alloy and the Cu coating are porous materials.

Been in the rolls, the coins touch each other on reverse sides. So the observe will has more oxidation and will transfer to the Reverse, and start the processes of oxidation.

Nothing could be done to stop or inhibit. Some tests claim that in complete vacuum or varnishing can stop.
Edited by silviosi
01/28/2022 9:56 pm
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