Étiquettes

Restorers' Secrets: When Intervention Increases and When It Decreases an Item's Value

In the world of antiques, not every aesthetic improvement is beneficial. A prime example is numismatics. Attempting to make an old coin shiny with cleaning agents can reduce its value tenfold or more, or even bring it down to the price of the metal. The reason lies in the patina—a noble layer that forms on the metal's surface over decades and centuries.