Bremer Blau is an artificial copper carbonate and was a widely used wall paint in the 17th and 18th centuries. This synthetic azurite has a somewhat greener hue than natural azurite. However, the paint application is much more uniform. There is evidence for using a mixture of Bremer Blau and Smalte for darker shades. Bremer Blau is suitable for glue and tempera, but not for oil.
