IanB

I am not a chemist so I cannot accurately say why verdigris appears but I believe it is a chemical reaction between the metal and the environment that it is in. Unfortunately the coins we like to collect are made of the metal that is the most likely to have this reaction, add to that moisture, bad storage and whatever else they react with and verdigris is one of the side effect. like most chemical reaction if you can remove a part of that reaction it will stop. If a coin has some verdigris on it and it is continuing to grow then the conditions for it to do so must still be present. I have read that a small amount of baking soda will neutralise the reaction. If that is the case, and I have no way to prove it other than what I have read, then once it is stopped then as long as the other factors are controlled why should it grow again?

As far as I am aware for verdigris to spread the conditions that have caused it need to be present. It is not alive, it's a chemical reaction. Remove the conditions and it will not spread.

You maybe right, silver is alloyed with copper in various ratios. So I suppose the chemical reaction could still take place. I don't have much experience with silver coins but I am guessing someone on here will have the answer.

I hope that I am not wrong in saying that verdigris cannot form on silver. I believe that verdigris is a chemical reaction between copper and the environment, I an not a chemist so please don't ask me to try and explain it? Can you post a picture of your coin?

£100 BIN

Okay, fair enough. You have this one and the next one is mine.

Yes, but he is offering free postage.

It looks similar but there are differences. The inscription on the bottom of the box could be interpreted in two ways. Firstly, it could just be a note that records what took place. The coin was given to someone by L. C..Wyon. or It is as assumed, a note written in his hand. Personally I think the signature on the portrait doesn't match enough to prove conclusively

Is he holding a cricket bat?

There is some lovely toning going on there. I bet in the hand they look even better. If I had to choose one it would be the 3d

Thats an awful lot of money to pay for a blank disc with some scratches on

Mick I don't know a lot about Four Pence's but that looks like a good one, I particularly like the obverse. Did you do the photography?

I like the sound of that. Maybe members could post examples of cleaned / dipped coins such as Matt's halo coin above and then take some of us less experiences collectors through what to look for.

Maybe. I am always just amazed how these things are recognised. I would have said it looks okay, and its never easy telling from a picture what the real colour of a coin is. I am going to put it out there and make a point that I often see on here someone put a coin up for others to see and sometimes the reply comment is just "cleaned" or "dipped" with no further explanation. It would be good if the person replying gives a bit of a reason why. I enjoy learning from everyone on the forum, but I think it can put some people off from posting if things are explained rather than just cleaned or dipped.

What indicates that it has been cleaned?

No worries Pete, whatever you have will be fine. I am sure there will be something of interest in all of them. Let me know the cost and I will put it into your account. All the best Ian

Pete, If they are still available I will have 10 of them, recent ones if possible. Ian

If you got it for free, then well done. From you photo I am going to say it's better than VF but your photo is a bit grainy to pick up the fine detail but it looks to be in good condition. I reckon it's worth about what you did not pay for it maybe even a little bit more.l

How much did you pay for it?

There is some lovely venison down south already

Plenty more coins in the ocean Pete.

I would be happy with it. Nice colour, good fingers, no knocks and dents. A weak strike on the helmet and her left arm but not big money spent for a straightforward honest coin

Thanks Pete I like the plan

I'll have one Pete, if Paul O wants to do the deal. Ian