2004 Lincoln Memorial Cent: Check This Out Someone Different

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.

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.