Another Example of Verdigone use

I started to add this to the other thread

http://www.cointalk.com/forum/t47318


Which by the way had final photos added to it tonight.

This case involved an Indian Head cent with widespread verdigris that appeared to have deeper deposits which would result in pitting. I hope that I can draw some conclusions looking at the results. The color/light is different because the light source for the initial photo died, and the light for the result on the right is a totally different source/intensity. I noticed that the light emerald green areas seem to respond best, indicating a thin layer that verdigone is very effective on. The darker blue-green areas and the brownish green areas had deeper "pits" of verdigris and verdigone would have a difficult time removing that. No physical action was used. Maybe this will help make determinations as to expectations.

Jim

 

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very good :thumb:

the problem is if all the verdi is not removed it will come back and if i have to use biox after i use this then the point of using this gets defeated. but it seems to be very handy for light /early verdi

 

Hi Jim, another interesting experiment, I think the photos look fine. How long did you soak it in the verdigone? Did you use it full strength. I suppose at this point, if one were trying to stabilize the corrosion, oil/thorn would be appropriate.

 

Doug,
I placed an order for the BIOX conservation fluid and it seems to be backordered, but I will do a similar experiment with it when it gets here. I will gather up some coins to experiment with a little before deciding the parameters of the experiment, as I have never used it before. Maybe if someone is actually very experienced using it, they can share some "tips" for best performance. I have read of people using it , but never any indications of actual specifics.


Jim

 

Thanks for sharing!

The green stuff is corrosion, not verdigris, and you've now figured out what hides under the green stuff -- a damaged coin.

 

I've noticed in my readings that the definition of verdigris seems to vary, mainly about it's composition or copper compounds. But since the copper portion originated as the coin, it should all be considered corrosion of the copper (coin) IMO.

Yes, there is a damaged coin underneath, no compound can "repair" the damage, but in my opinion, it is a better appearing coin, and with proper storage, it will not revert back to the former.

Jim

 

I agree left without the cleaning this coin would continue to corrode and would be worthless in a few years. Verdigris seems to be the exception to the rule of don't clean as it continues to degrade the coin maybe more than cleaning would. Ice

 

I've always considered black "gunk" as verdigris, and the green/red "corrosion" as "corrosion". But perhaps I'm wrong. :rolling:

 

In my experience, the only way to stop it completely is to completely remove the corrosion, strip the coin, and recolor/oil it -- and even then it doesn't always work -- as sometimes it is a result of impurities in the metal itself (particularly true for the older coppers). Proper storage of the coin can slow it down to a virtual standstill, but once corrosion starts, its effects are difficult/impossible to undo.

 

Oh no!!!!!!

Is the great guru GDJMSP advocating the cleaning of coins?

 

Its not cleaning, it is conserving !

Although Doug can take care of you

Jim

 

Thanks for posting the results Jim. I'm always interested and excited to see the results of VERDI-GONE™.

**Just for the record, Jim and I are not in cahoots.**

 

If GD runs away ill need a new GV either that or the dungeons hey desert what r u doing these days i need a new security commander

 

for the love of fod dilute the thing and the results in most cases are instantaneous u cant leave it like verdigone or it will become penny gone

 

conserving is nothing but fancy cleaning like chipolate and choclate