Stereochromy
As Stereochromie (Greek. Στερεός, stereos = solid, χρωμα, chroma = color) refers to a 1846 in Munich by Josef Schlotthauer and Oberbergrat Johann Nepomuk von Fuchs invented type of painting that has been applied for one time to wall surfaces immediately with paintings , in the manner of fresco painting , to be covered.
functionality
A painting ground was prepared, which for paintings on canvas in a light bond, with which the same was saturated, for walls with stone or mortar, consisted of a few lines thick plaster, which combines with the stone base to form a mechanically completely inseparable mass.
On this ground, specially prepared mineral paints driven in water were used to paint , and because these unite with the ground and the picture surface was finally made rock-hard by spraying water glass . With this method, a simple technique should be found to make wall paintings inside and outside insensitive to the adverse effects of temperature change, humidity, etc., which was only partially successful.
The breakthrough came in 1878 with the patent from Adolf Wilhelm Keim . As early as the Middle Ages, the binding agent for mineral paints, liquid potassium silicate, was known as liquor silicon , but there were no good production and application possibilities. Keim perfected the use of water glass paints and is now considered to be the actual inventor of durable silicate or mineral paints, as they have been called since then. Its germinal colors have become indispensable in artistic circles.
Web links
Stereochromy and mineral painting in The large art dictionary by PW Hartmann .