Nordic Brown™ products are pre-oxidised at Aurubis' factory to give straightaway the same oxidised brown surface that otherwise develops over time in the environment. The thickness of the oxide layer determines the colour: both Nordic Brown™ Light and the darker Nordic Brown™ products are useful to minimise hand and other construction marks that can occur for a short time after installation with bright' standard copper. But light and dark versions can also be combined perhaps with other finishes such as Nordic Standard to create various visual effects.