ABSTRACT
Prussian blue (PB) is a nanoporous deep blue pigment invented in Berlin in 1706 by Johann Jacob von Diesbach and Johann Conrad Dippel. It was less expensive and more readily available or more easily produced as compared to ultramarine or other blue pigments which were in use at the time as a blue color in paintings. Although PB was invented more than 300 years ago and has ever since been an object of scientific inquiry, it remains an interesting and important research object today. PB was soon used by the local painters in Berlin, including important members of the Royal Academy of Arts. Several paintings painted in 1710 and in the following years in Berlin have been identified to contain the pigment PB.
