Developing My Newest Coin Product! Verdi-Care

Test of new formula 100409 on verdigris infected Lincoln. Using microfiber towel soaked in product method. Verdigris ranged from light to heavy. Coin also had a high level of surface debris.

Note: Surface dirt was fairly heavy and evenly spread. The coin is lighter after application due to removal of the grime layer.

Heavy verdigris was not removed at all. I used a toothpick soaked in product to prod the remaining heavy verdigris and I broke it. LOL The only way that heavy verdigris can be chemically removed is with strong acid. This would leave tell-tail pits as a lot of copper has been pulled from the surface with heavy verdigris.

Collectors and conservationists take note! Yes, the light verdigris has been removed, but once again it's obvious that the coin has been conserved. Often collectors want the verdigris removed, but what's under it is not always pleasing.

I selected this test coin for the gummy, black residue on the reverse. There was also some lighter residue around the upper right and center of the coin.

This is definately a case where I don't like what was under that heavy black clump. The surface was badly scratched in that area. Perhaps that's why the gummy residue stayed there.

I picked out this coin because it looks to have had heavy verdigris at one time. It looks to me like the heavy verdigris was accidentally cleaned at some point leaving verdigris inside some deep pits. This was a tough case and I didn't expect much.

Note: Very common to a coin that has had verdigris removed, notice subdued red tint characteristic of cuprous oxide (Cu2O). This is due to oxidation of copper. Sometimes this can be mellowed by a long-term (months) exposure to air. Collectors should learn to recognize this as a sign of previous corrosion.

The remaining heavy verdigris can only be removed with strong acid at this point. However, it would completely destroy the patina in the process!

1978D Lincoln with mostly light verdigris, some moderate. Towel method, 30 seconds:

Just a horrible coin, just wanted to see what would happen. Only the light verdigris removed, there's some thick, heavy verdigris on this coin, but the spots are small.

Do you see a difference? What do you think? Do you have any Ikes that you think the product could be useful on? Do you trust the chemical technology?

I need people to talk to me here. If you hate the product, the idea, or if you like it....don't be afraid to speak up.

I could not see the difference but I did notice a difference. It could be psychological though. (I know you conserved it, therefore I notice it). It could be my monitor, but it does seem to have a glint to it now.

To be honest, it was not as impressive as the other tests. Like that IHC above, that is an incredible transformation!


I do have some circulated pieces with some gunk on them. I might be interesting to see how they change.


I definitely trust you, and I am very impressed with most of the examples shown, especially the copper (which I think benefits most from the conservation).