Characterisation Of The Surface Composition Of Exposed Grisaille Sensors Using Highly Sensitive Chemical Analysis Techniques. Potentiality And Limits Regarding Research In Conservation

In order to test the glazing protection efficiency on historic sites, Vidrio programme gave the opportunity to expose model painted glasses as "grisaille sensors" included in stained glass window panels. These alkali-lime-silica glasses, reproducing ancient glass compositions, were exposed both in protected and unprotected position for comparison. They are expected to react to their environment and then to give scientific information on both the ancient glass performance by transposition and the impact of the protection. The aim was to study if the protective glazing plays its role correctly and to complete knowledge on the weathering mechanisms of the painted glass in-situ.