Over the last few decades, Aurubis has developed a range of factory applied surface treatments to provide straightaway the various stages of oxidisation and patination. The processes involved are very similar to those taking place over time in the environment and utilise copper mineral compounds, not alien chemical treatments. Essentially, they bring forward the environmental changes without taking away the integrity of Aurubis copper as a natural, living material. All Nordic Surfaces form an integral part of the copper and are not coatings or paint. Ongoing changes will continue over time with all Nordic Surfaces depending on the local environment.