Results of dipping an improperly cleaned coin

[JIM F.]

Bought an ugly Trade Dollar that had dip residue on it. It was in an ANACS "improperly cleaned" holder. This is what it looked like upon purchase. BTW it was much worse than the pictures show.

 

 

This is what it looked like immediately after dipping

 

And this is what it looked like a few days later...no surface treatment added, just mellowed out I guess.

 

This was for my type set, and one instance when dipping a coin is justified.

[mtnstyne]

Thanks for posting that. I have often wondered about picking up similar problem coins for the dansco.

[physics-fan3.14]

Jim, did you thoroughly rinse the coin in distilled water? An improperly rinsed coin after a dip can continue to develop even more problems. It was and is a problem coin, nothing is going to change that. But you appear to have removed harmful substances from the surface - so I would consider this conservation.

[JIM F.]

Those pics posted were taken a couple of years ago. Here is the coin today. Note a bit of toning setting in.

[physics-fan3.14]

Did you rinse it? That toning is exactly what I was talking about - toning after a dip. It needs some time in an album or something to regain some skin.

[JIM F.]

Yes, I rinsed it in distilled water and dried it by dabbing with a soft cloth.

[Kurtdog]

There's really no way (at least, none I'm yet aware of) to rehabilitate an improperly cleaned surface on a coin. As was suggested, however, an improperly cleaned surface, given sufficient time, will tend to build a veneer...a.k.a., something approximating "skin"...I believe.