I was wondering what the Numismatic Conservation Service (NCS) does that's different from other conservation services, like 'Beautiful Coins Again" here? For what it's worth I never even knew these services existed a year ago. So many things changed in the 20+ years my collecting was dormant so-to-speak. Thanks Bone
The NCS guys are supposed to be "professionals." If they do it, it is OK. If anyone else does it, it is wrong. Charlie
To the best of my knowledge nobody knows exactly how or what NCS does to conserve the coins. But in all likelihood it is a dip of some kind. But there are a great many coins that have been dipped by those individuals with experience and using the right chemical that have also been slabbed by the top grading companies. The problem with dipping comes in when a person uses too harsh a chemical - or they simply dip it for it too long or too many times - and it strips away the surface of the coin. As for other cleaning methods besides dipping - without exception they leave traces of damage.
