zöldverdigris
Zöldverdigris is a colloquial Hungarian term referring to the green patina that forms on copper and brass surfaces. This greenish layer is a result of oxidation and the reaction of the metal with environmental elements such as moisture, air, and pollutants. Chemically, verdigris is a complex mixture of copper salts, primarily copper carbonates and acetates, though chlorides and sulfates can also be present depending on the environment.
The formation of zöldverdigris is a natural process that occurs over time. In outdoor settings, exposure to
Historically, the term verdigris has also been used to describe a pigment derived from this natural patina.