TY - GEN A1 - Torge, Manfred T1 - EDX-Analysis on medieval glasses and innovative protection of stained glass panels N2 - The church of Koszewko (Poland) is a brick building edified in the 15th century built on cobblestone foundations. There are five windows in the sanctuary. Three of them enclose heraldic panels from the Küssow’s family from the 15th century which are surrounded with Goethe glass from the 18th century to complete the windows. The colored heraldic panels are strongly damaged and corroded with massive paint layer losses, glass- and leadbreakages. Those medieval glass fragments have been shortly discovered and are of particular interest for Poland since only few medieval glazing have been conserved. The damages as well as the glass compositions have been investigated with ESEM/EDX. Two categories of medieval glass compositions have been identified. The blue glass is particularly sensible to corrosion because of his high content in K2O. The colorless and the red glass samples belong to a stable glass type. Due to the thickness of the gel layer, it is easy to see that the degradation is strongly proceeded. The protection of those medieval stained-glass panels is absolute necessary. The medieval panels have been restored and surrounded from a copper frame. Then they have been fixed on the wood frame in the church. The exterior glazing has been closed with a panel of Goethe glass. The gap between the Goethe- and the medieval glass is about 3 cm. The Goethe glass panel has been stabilized with a film based on polyester to protect the medieval glasses against any damages. In this way, a low cost protective glazing has been installed for a long-term conservation of each medieval stained-glass panels. The climate measurements over the period of one year on the restored windows are in process. The temperature and the relative humidity are recorded in the church interior, in the gap between the original and the Goethe glass and outdoors. T2 - 93rd Annual Meeting of DGG and Annual Meeting of USTV CY - Nuremberg, Germany DA - 13.05.2019 KW - Medieval glasses KW - Stained glasses KW - EDX Analysis KW - Corrosion PY - 2019 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/48025 AN - OPUS4-48025 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany