NGC Conservation: Keeping Hazing Residues in Check
July 14, 2026
When coins are stored in improper conditions, they often end up with residues or other unsightly or harmful contaminants blemishing the surfaces. Fortunately, NGC Conservation is here to help. NGC s conservationists use a variety of proprietary techniques to remove these harmful surface contaminants, stabilizing and protecting a coin s surfaces. Often, these conservation efforts also improve a coin s eye appeal. After coins are conserved, they are seamlessly transferred for grading and encapsulation with NGC.
This month, NGC s conservationists encountered several coins with hazing residues afflicting their surfaces.
From NGC