A few recent NCS-conserved coins show how removing residues can greatly enhance a coin's beauty and save it from damage.

Numismatic Conservation Services™ (NCS®) uses a variety of proprietary techniques to remove harmful surface contaminants, stabilize and protect a coin's surfaces and, in many cases, improve a coin's eye appeal.

Coins made of copper alloys can develop residues in a slightly different fashion than coins of other alloys, though the chances of a residue causing permanent damage are greater. The 1794 Franklin Press token is popularly collected as a colonial coin. Residues have formed as a spotty haze on this copper alloy piece, especially apparent across the center of the reverse. The offending residues were able to be safely removed with the skillful work of NCS conservators. Upon completion of the necessary conservation work this colonial piece was able to grade with NGC.

To read the complete article, see:
NCS Conservation: June Highlights(https://www.ngccoin.com/news/article/8354/NCS-coin-conservation/)