Experiment with Verdigone (tm) on copper cents

Spock, are you referring to "old" coins? Were they coated with the insect origin or the tree origin laquer? Or more modern that uses polymers like acrylic?

Jim

 

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while you are at it. c an you start two threads on lacquering and how to get lacquered coins in tpg slabs and also how to get rid of polishing from the coins. thanks.

 

i am referring to coins made of silver, copper, bronze, gilt, and gold made by the British east india company from 1750 to 1875 some of the overzealous collectors lacquered the coins as the Indian environment was not good enough to store coins in an effort to protect them now to buy those coins at those fabulous prices is a waste if i cant restore them. i cant also skip them coz some of those coins only exist in a lacquered state. i am thinking they were tree origin lacquer due to people' sentiments but might also be insect origin.

 

Spock, I hope your not calling me a madman. Though I think your referring to Dru cause you guys had an cyberspace "fight". encil: I think we can politely disagree and not call names. Just give our reasoning for our points of view. Nothing good comes from this IMHO. If I disagree, I hope it's in kindness and simply sharing my points of view. As far as lacquered coins I have bought several and it is very hard time getting it off. Paint thinner, acetone (up to 20 hours!!). Bought a 1911 D and 1912 D from Chuck Furjaneac off ebay and they were quite lacquered but couldn't tell from the photos. Both had decent size obv scratches once removed. Will start another post on that. Don't want to take away from Jim's wonderful post. THANKS SO MUCH JIM FOR YOUR AWESOME SCIENTIFIC EXPERIMENT!!!!!!!!
:high5:

 

excellent experiment and excellent conclusion :thumb:

just keep in mind there are no half measures if verdi doesnt go 100% it doesnt matter and you are right moulds are a problem. also i am trying to get in touch with a couple of curators to see if something can be developed. we would be milionaires jim if we made a solution that gets rid of verdi completely without damaging the surface below. coins are not even 1% of that market

 

Spock, thanks for thinking of me. But I must decline as I pursue my experiments into how DNA is influenced by the string theory.

Jim

 

if you are serious then that is an area of interest also

 

Spock, I am assuming you are joking!! I do wonder if any laquered coins have graded? I bought this coin from a guy off eBay who I have bought several nice coins from actually that graded, in fact. The last two photos are what I used to buy the coin. The first three are after 10-12 hours of acetone. I did more acetone later and a "gray" spot appeared on the upper left obv. I haven't photo'd yet.

 

well there is a way to get polished coins in tpg slabs rusty mentioned it. ill go start a thread but i have no clue about reversing laquering and i dont wanto spend 5k to find out it cannot be done

 

No problem, I do it so often myself ! Thanks for the compliment and I wish to thank you for your contributions to the thread also.

Jim

 

You showed us this solution does do the job on the green stuff, Jim...i.e., that it isn't just so much "snake oil." And, you demonstrated/documented the trade-offs. I'll thank you, too, for taking this time for us. :thumb:

 

Final results photos

Here are the final result photos after 10 days sitting on the table.



The 2 at the top are the 45S lincolns, the one on the left is the control that was in water, the one on right had the verdigris. The 2 middle ones were BU 1960D, the one on the left was in water and the one on the right in verdigone. The one in the bottom is a 2008 cent ( AU+) from circulaion for color comparison.

Here is the control and the verdigone treated 45S shown oriented as before. Control on the left.



Here is the uncirculated coins ( control on left)along with the 2008 cent for color comparison.



Everyone can draw their conclusion as to whether the verdigone treatment changed the color/patina enough to make it apparent if you didn't know.

I can see when they are next to each other that there was a change, but in honesty, if either verdigone cent was presented by itself, I would not know it had been treated, but others have had more experience and might have different opinions. I didn't consider the possibility that the control substance ( distilled water) could darken the patina, I suspect it did, but I needed controls on the control. It is the 2008 that seems offcolor

I used it before the experiment, and intend to continue to do so. But again!, be sure to have some experience with common lincolns before using it on a more valuable coin.

Thanks to all who nominated this thread! I appreciate it! :hug:

Jim

 

Thanks Jim

While not as scientific as yours, I am going to do this as well. I'll get with you in a pm on this.

 

Got to this a bit late but I have to say a facinating read :bow:

 

Wow!!!

Great Post!!!!!!! I was reading old post and stumbled upon this.....again....GR8 POST.....:bow:
Thought I would bring this to the front again..
Thanks again, Jim....
and all who commented......
Neal

 

Just read about 6 pages of this thread, and this is pretty cool!
I see how the distilled water jacked up the coin vs. the verdigone
This is pretty sweet, and I think I'm going to re examine the pics, and the rest of the thread
Very good job Jim

 

Jim - It was a great read - Thanks for the outstanding job!

 

Glad it was of some use to people. It is a specific tool for specific conditions, and does a good job when tool and problem are matched.

Thanks for the compliment!

Jim

 

Shameless plug here.

Again, thanks for the thread Jim and your perfection and attention to detail on your experiments. If used properly, this stuff works. Some have been unhappy expecting a miracle cure-all....that it is not. Some have attempted to trick readers on other sites with doctored photos and problem coins ( pre Verdi-Gone (tm ) ) and all have been foiled and their intentions exposed.

It simply removes verdigris, that is ALL it is designed to do.