Experiment with Verdigone (tm) on copper cents

i used to live in chicago. and as far a smmy spelling goes its the software that refuses to corect it.

if your coin is already in aslab why would u crack it out just contact the tpg they will fix it

 

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couldnt he have said that sooner i wasted a whole bottle of biox on my precious nickel coins without even a cm of success ( for all practical purposes i think verdigone is a form of biox) . i think its really atrocious that the biox makers didnt put a warning sign that it doesnt work with al3 and ni but at least al3 is resistant to verdi. if u really wanto have fun take al3 coins put in some biox or verdigone neat no dilutiona nd leave it for some hours. ull get a coin that most of us call black beauty

 

Boss, I reread the post, and honestly, I would have to see the coin spot close up to decide whether to leave it alone ( most probable), Crack it out and work it, if it bothered the devil out of me ( less probable) , but I would not send it to NCS after the stories you told. Read the last page on this posting where Thad mentions "spot treatment". That would be what I would try if I cracked it out.

http://www.coincommunity.com/forum/topic.asp?TOPIC_ID=33105

Jim

 

Hmmm Spock, I will go through my buffalo nickel rolls and see if I can find a greenish buffalo to experiment on. But I have some new coins and haven't had time to post them!

Jim

 

isnt it already inthe slab Jim? if it is its the TPG's responsibility to fix it.

 

ur buffalo isnt made of al3 so it might not work. i wish i coud send you 5 or 10 coins somehow but the question is how?

 

I will pull up an old thread, I still have these coins somewhere:

http://www.cointalk.com/forum/t32003/

Do you think it would be worthwhile even attempting to try the Verdigone on them, or does it not "do" pvc?

 

That was an great experiment desertgem, thanks for taking the time to show the results here. When you get a chance, please post the before and after of the verdigris coin, complete obverse and reverse, not just the infected area.

 

Doug, the inventor now says that he has found that a "setting in air" period of about 5 days after treatment restores the patina ( but sure not to exactly what it was). There is a pinkish coloration of "fresh copper", and I suspect it would retone faster than an acid etched one.

Jack, if acetone won't remove it,and it is bluish green, it is similar or same as verdigris, and it would be worth trying. With the Verdigone, you can see "some" effect in the first 24 hrs if it going to work. If it is working, let it work. If not, take it out The coin in the photo looks too far gone. The green is almost blackish, more I suspect copper oxide which verdigone reacts with slowly.

Acanthite, I plan to do that. Probably I will give up on it going farther in a couple of days if it cease progression. I know when all bue-green color is gone, the solution can't help the spot.

Thanks for the comments Guys!

Jim

Hmmm just had a 4.0 earthquake centered about 20 miles away...interesting

 

Hello!

First off, Jim, thank you for perfoming this test. Being a scientist, I really enjoy seeing VERDI-GONE™ customers doing experiments such as this.

My background: I'm a chemist of 22 years in the metal working fluid industry. I'm primarily an analytical chemist, but I'm also very involved in product development and regulatory affairs. My expertise is in the interaction of metal surfaces and fluids.

I'm an avid collector of Lincoln cents. I have a complete collection and few thousand more. They are my true love of collecting!

I'd be happy to answer any specific questions about VERDI-GONE™. After a quick read through this thread, I'd like to address a couple questions that came up.

- VERDI-GONE™ is unlike ANY other product on the market. It was invented for ME and only for my use. I only started selling it due to multiple collector requests. After a lot of frustration with trying all the classic methods for removing verdigris, I decided to develop a product that works rapidly, yet generally maintains the original patina of Lincoln cents. It is NOT based on any other commercial product, it is a one-of-a-kind formulation based on a proprietary, laboratory reacted molecule. VERDI-GONE™ is designed to only remove/react with verdigris, it is NOT a cleaner. It is a copper conservation fluid. Other commercial products are based on harsh chemicals and often contain detergents or other cleaning agents that will permanently damage/alter the copper surface. Another reason I developed VERDI-GONE™ for myself.

- VERDI-GONE™ is not recommended for BU coins. I've found that the unoxidized copper surface of BU coins can become dull after use. When copper oxidizes, it actually produces a protective layer on the surface. VERDI-GONE™ is specifically designed to exploit that characteristic. It tends to only react with verdigris (acetates, carbonates, sulfates and chlorides of copper).

- After removing verdigris with VERDI-GONE™, some of the non-oxidized copper surface may be exposed creating some uneven color. In those cases I recommend reoxidizing the surface by exposure to air for a few days, weeks or even months. Doing so will allow the copper to reoxidize, smoothing the color of the coin.

 

Hi Thad,

Welcome to the forum! Always nice to have the "horse's mouth" to hear from. I know from the other forum that you have a tremendous group of Lincolns. Will be nice to see some of those later. I hope I haven't misrepresented any aspect, if so, just correct me!

Some have asked me if the action can be uncreased by raising the temperature, and I didn't know the answer.

Jim

 

Hey Thad,
I am one of those that wonder about temperature. A couple questions if I may.
(1) Does heat increase its ability to remove vd and does cold solution reduce negative effects on BU coins?
(2) Does the temperature of the coin itself affect results?
(3)At what temperature does the solution combust and freeze?

Thank you and welcome to CoinTalk.

 

Thanks for the welcome!

1) Do not heat VERDI-GONE™. Doing so will degrade the active ingredient and reduce effectiveness. Use at room temperature only.
2) Use normal room temperatures.
3) VERDIGONE™ is non-combustible and water-based. It freezes just as water, 32°F (0°C).

Thanks for your interest.

 

Thanks for the quick reply.

 

Here is the 144 hrs results (6 days). I might be at the end point, but I will keep it going. It is of the size and color now that I might well miss it.

Jim

 

thats because you are under a spell

 

Hi Thad,

welcome to CT. i liked your posts over on the other forum and nearly joined because of it. I think verdigone is a great step in the right direction.

 

the problem with that jim as GD mentioned earlier is if it doesnt go away completely its going to come back