Green spots on one cent piece

I would like to know that also, what amount of contact with other coins will lead to the other coins developing that same problem. And how long it can take for those coins to show the problems. I ask this because I roll search some, and obviously there are yucky coins in contact with others that are nice.

 

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Hey, just put it on your "want" list. I'm sure you'll get a long enough one so that you can arrange for someone to find and send you those if you need them in your collection.:smile

 

anyway to make sure that the other coins it came in contact with wont get it?
(dip in acetone or something like that? )

 

Dipping in acetone and keeping it dry should do it. Even if you stop the reaction with a soak in acetone and a trip in the oven, this coin should never be stored next to other copper coins due to the possibility of possibly infecting others. The only proven way to keep it from being contagious is to physically remove the verdigris.

 

all my coins are in 2by2's so now they dont touch eachother.
But i think i am going to remove this one from the collection, just in case...
Not going to trow it away, but i wil keep it away from the rest now

 

It's just plain, old verdigris. I know you're not in the USA, but this is a VERY common coin and not worth the effort of conservation.

 

LOL! I'm still working on it. The only reason I made serious progress in 2009 is that I was laid off a lot of the year. I'm still tweeking and adding to the book. I have another forum member (Chemnistry PhD) doing a review for me and he should have it back to me soon.

 

Jeff - You, my friend, are a SMART guy. Your chemistry is just fine and your answers are quite good.

 

Verdigris is absolutely "contagious". The components can and will provide feed materials for the verdigris forming process. Coins with verdigris should be kept in sealed holders away from other coins. Here is an excellent example of what I call "contact verdigris". While I was roll searching I came across this pair. The one coin is very corroded and it was incontact with a red, brown coin for an unknown amount of time in the roll. I had to pry these apart, they were strongly stuck together!

 

thank you all for the info.
I removed the infected coin from the album where it was in and took a closer look at the rest.
There was one more coin that looks like it has the verdigris to, so i alwo removed that one from the folder.
Now i store them in a seperate folder, not trowing them away, but to learn something more about the verdigris problem.
I woonder how they will look in lets say 5 or 10 years...

 

IMPORTANT NOTE - Only do this to your coin if it's basically pocket change. It will CLEAN your coin.

I'd take the coin you posted over to the sink and use hot water on it. Rub it with your fingers while rinsing with super hot water. That will probably remove a good bit of the verdigris. Pat it dry, then follow medoraman's advice and use acetone on them. It will dehydrate the remaining verdigris and "slow it down".

Keep that coin folder in a tightly sealed ziplock bag and maybe even toss in a desiccent pack. It should be OK until you get a replacement.

 

On another note....you need to find someone willing to ship to you. If you're into US coins, a set like this would bring you great enjoyment:

http://www.ebay.com/itm/1959-2011-C...95?pt=Coins_US_Individual&hash=item1c23b1b5ef

 

If someone wanted to practice conserving coins, at least this would be a throwaway. Since its bronze, I would use a sharpened piece of brass and a microscope. After following Thad's great advice, physically remove the remaining verdigris with the brass pick. Only way to TRULY stop it. If someone was really good, you could try steel but have a much higher chance of damaging the surface with an errant cut. Ancient collectors get used to having to do this on certain coins. Short of that, Thad gave you great advice on how to deal with it.

Chris

Btw this is another method, and you can save the toning. Physically removing the verdigris is always an option, though either way your coin will always be damaged.

 

now that is a nice object
going to try to find out howmuch shipping to Belgium is.
When i know that, i think i know of someone who wants to ship them (my ebay buddy Taco)

But first i realy need to know about shiping costs. because i think the weight of 123 coins will be heavy to ship

 

I was just reading "Green Spots on one cent piece" and it confirmed my fears for some of my wheaties. My question is: Have these coins pretty much lost their numismatic value now that the green blob has infected them?

 

It’s what’s called a cull. Yes their mkt value in the tank.

 

At least the price of copper has the melt price up to almost three cents. Gotta find a bright side.