The degradation of art objects is caused by the combination of all indoor environmental factors. To investigate the deterioration processes in paintings and at the same time to design a risk assessment system, chemical sensors based on artist's materials are developed. Therefore standard paint films of egg yolk tempera with lead white 2PbCO3·Pb(OH)2, azurite 2CuCO3·Cu(OH)2 or smalt were investigated. With accelerated ageing experiments the simulation of natural degradation processes is aimed. First markers for chemical changes were found in the FTIR and TG/DSC measurements.
Authors:S. Felder-Casagrande, H. Wiedemann, and A. Reller
The calcination of limestone is one of the oldest technical processes and it is still of actual interest. Very early calcitic
mortars from Turkey have been investigated and compared with materials of other early civilisations i.e. with Egyptian mortars
containing gypsum as well as medieval dolomite-based mortars from alpine regions. Contemporary calcination procedures, in
particular the cement production, range among the most important global industrial processes causing non neglectable environmental
problems. Sustainable, solar energy assisted calcination technologies and the conversion of product CO2 into useful commodities are discussed.