In The Field Of Experimental Simulation Using Glass Soiling Sensors And Modelling Of The Atmospheric Particle Deposition On Stained-Glass Windows With Protective Double-Glazing

Samples of Si-Ca-Na modern float glass were exposed for one year as soiling glass sensors at Saint Urban Basilica in Troyes, and Cologne Cathedral, inside the churches and in the interspace between stained-glass window and protective double-glazing. Mass of the total deposited particles; carbon content; major ion content and haze were measured. For both churches and whatever the location, glass underwent a significant soiling phenomenon. A model of haze time evolution was fitted to experimental data obtained in the Troyes Basilica and one of the total mass of deposited particles in Cologne Cathedral. The role of double-glazing is not only reducing the rate of particle deposition onto stained glass windows and internal side of glazing, but also reducing the saturation level of deposition which is attained more rapidly in the interspace than inside the monument.