Development of an innovative solution to remove colored copper compounds from environmentally damaged marble; for example, the Haydn-Mozart-Beethoven-Monument at in Berlin-Tiergarten
May 2001 – March 2003
A simple and cost effective procedure to remove colored copper components from marble, limestone and various other stone types containing calcareous substances has been developed together with the scientists of the Berlin based company FEAD. The procedure was successfully tested by removing the copper components from approx. 140 individual parts of the famous composer monument in Berlin. The fact that the dark plaster residuals on the surface of the marble parts were also removed in the process should be mentioned. Subsequent inspections of the marble parts treated (REM with EDR and Ion Chromatography), only showed traces of plaster in a lesser concentration than the plaster content on marble parts subjected to the outdoor environment.
In the event it should become necessary to remove colored copper components from natural- or manmade stone surfaces for esthetical reasons, or within the scope of restoration, a procedure, as well as the corresponding products required by professionals for implementing these tasks are now available.
The required materials can currently be purchased from FEAD-GmbH
Additional information is available at: http://www.dbu.de/projekt_18016/_db_1036.html