These finishes are pre-patinated at the Aurubis mill to create the green/blue/turquoise patina that naturally develops over time with exposure to the environment. The pre-patination process ...

The period of unsightliness can now be eliminated by subjecting the copper to electrolytic corrosion under controlled conditions; after 15 minutes an insoluble patina of good green colour is ...

Later, he was ruined in the copper crash of 1889. At the Statue’s unveiling, in 1886, it was brown, like a penny. By 1906, oxidation had covered it with a green patina. The thin layer of ...