Figure 5From: Potash-lime-silica glass: protection from weatheringToF SIMS depth profiles of sol–gel coated glass M1 a untreated, b after 1 week and c after 4 weeks of weathering at 10 ppm SO2 and 80% RH. 41K and 44Ca isotopes signals were chosen because of the overly high intensity of the 39K and 40Ca signals.Back to article page