How do you get the green to go away?

tlhoy

How do you get the green to go away?
Anything I can do?
Glenn

Compa

Take the photo in black and white?

Compa

Seriously ...

How about a Dremel tool with a grinding wheel?



Actually that is corrosion, nothing to be done except destructive means. Leaves pits in the coin and it will be a bright red just like it was new.

cacheman

I think Jester1 would suggest soaking it in olive oil for a week or two, then rinsing it with acetone, then distilled water, and drying with a hairdryer or daubing it between two layers of towel.

satootoko

That looks like corrosion to me, not PVC damage, so acetone alone certainly won't help.

On copper or bronze corrosion is often referred to as "patina". On silver it's tarnish, unless someone is trying to jack up the price of a coin, in which case it becomes "toning".

Refrema

I can tell you from experience that Olive oil will work very well on copper. I had a large medal that was Black, Green and generally really bad. I figured that if I destroyed it that I wouldn’t lose anything. After 2 days, I used a soft tooth brush that I dipped in the oil on some of the really bad places, put it back in for a week, and I was amazed at the final results. It did not change the brownish oxidation, it just got rid of the junk on the medal. The Olive oil did turn an ugly black. I have also used it on another one last month with the same results.

I did not use alcohol, I just dried it very softly with a terry cloth towel. It has been a year, and the medal still looks great.

Good Luck,

Bob

Blackhawk

Try Blue Ribbon coin conditioner. The corrosion doesn't look too bad and if you gently massge the blue ribbon onto the coin, it will not damage it. Blue Ribbon is fairly well accepted as a treatment for removing crud and mild corrosion from US large cents and I have used it on other copper with varying results depending on the extent of the corrosion.

cosmicdebris

Stop sneezing on your coins

theboz11

If you look at it under a 40x binocular Microscope it appears to be a waxy substance and I use xylene or acetone and a natural THORN such as a Rose or Bouginvilla(sp?)(Best), soak the coin for a few minutes and GENTLY pick it away or gently rub with the thorn to remove. High magnification is a MUST for a true conservation.

Steve27

Soak the coin in MS70, but do rub it (you'll remove the toning). Verdigris can be stopped this way, but there may be some residual damage.