Cercetări interdisciplinare privind conservarea ăicturilor murale din biserica rupestră de la Corbii de Piatră.

Abstract

The rupestrian church of Corbii de Piatră is placed in Argeș district and it is dug into the stone. The mural painting had been examined in situ and in laboratory to detect the technique and pigments. It was found that the mural painting had been done in al fresco technique on a aerial lime as substrate. The arriccio and intonaco layers are 3-4 mm thick. The murals of Corbii de Piatră church belong to Byzantine frescoes of XII-XIV century. The mural painting has a poor state of conservation because of humidity and low temperature during winter. Units forming colonies from airspore are in connection with part of the day and season. On the walls and vault there is a thick layer of biofilm made of algae and cyanobacteria. On the paper there are different colors of spots produced by fungi. On the wood of icons and chairs it was identified Coniophora puteana, a very dangerous fungus. Wood is also degraded by other fungi and insects. The mortar contains mostly calcite and quartz. The efflorescences look like crusts or veils. The gypsum had been identified by electron microscopy with EDAX and by difractometry.