(EP879800-A1)      A novel solar radiation stable aluminosilicate glass has the composition (by wt., on oxide basis) 45-68% SiO2, &gt;5-18% Al2O3, 0-5% Na2O, &gt;9-15% K2O, 0-10% CaO, 0.5-&lt;17% SrO, 0-10% BaO, 1-6% ZrO2, 0.2-5% TiO2 and optionally usual amounts of refiners, the sum of Na2O+K2O being 10%, the sum of CaO+SrO+BaO being 8-&lt;17% and preferably the Na2O/K2O wt. ratio being 0.4. Also claimed is a similar aluminosilicate glass which is suitable for the float process and which only contains up to impurity level quantities of PbO, As2O3, Sb2O3, ZnO, MgO and B2O3.    USE -   Used as a substrate glass in display technology, plasma display panels and solar collectors (claimed).    ADVANTAGE -   The glass has a high transition temperature (Tg) of above 650C, a low density () of less than 2.800 g/cm3, a thermal expansion coefficient (20/300) of 8.1-9.0x10-6 /K and good chemical resistance and can be produced as sheet by the float process.    (JP11029339-A)      NOVELTY - The solarization stable alumino silicate glass has a chemical composition comprising silicon dioxide of 45-68 wt% aluminium oxide of 5-18 wt%. Also, sodium oxide of 0-5 wt%, potassium oxide of 9-15 wt% such that Na2O+K2O greater than or equal to 10. It also contains calcium oxide of 0-10 wt%, strontium oxide of 0.5-18 wt%, barium oxide of 0-10 wt%, such that CaO+SrO+BaO is 8-17 wt% or less. Zirconium oxide of 1-6 wt%, titanium oxide of 0.2-5 wt% and a purifying agent are also present.    USE -   As foundation glass for display apparatus.    ADVANTAGE -   The glass has high transition temperature, low density and good chemical resistance especially acid resistance. It has very good solarization stability and is convertible to a sheet.    (EP879800-B1)      A novel solar radiation stable aluminosilicate glass has the composition (by wt., on oxide basis) 45-68% SiO2, &gt;5-18% Al2O3, 0-5% Na2O, &gt;9-15% K2O, 0-10% CaO, 0.5-&lt;17% SrO, 0-10% BaO, 1-6% ZrO2, 0.2-5% TiO2 and optionally usual amounts of refiners, the sum of Na2O+K2O being 10%, the sum of CaO+SrO+BaO being 8-&lt;17% and preferably the Na2O/K2O wt. ratio being 0.4. Also claimed is a similar aluminosilicate glass which is suitable for the float process and which only contains up to impurity level quantities of PbO, As2O3, Sb2O3, ZnO, MgO and B2O3.    USE -   Used as a substrate glass in display technology, plasma display panels and solar collectors (claimed).    ADVANTAGE -   The glass has a high transition temperature (Tg) of above 650C, a low density () of less than 2.800 g/cm3, a thermal expansion coefficient (20/300) of 8.1-9.0x10-6 /K and good chemical resistance and can be produced as sheet by the float process.    (US6087284-A)      A novel solar radiation stable aluminosilicate glass has the composition (by wt., on oxide basis) 45-68% SiO2, &gt;5-18% Al2O3, 0-5% Na2O, &gt;9-15% K2O, 0-10% CaO, 0.5-&lt;17% SrO, 0-10% BaO, 1-6% ZrO2, 0.2-5% TiO2 and optionally usual amounts of refiners, the sum of Na2O+K2O being 10%, the sum of CaO+SrO+BaO being 8-&lt;17% and preferably the Na2O/K2O wt. ratio being 0.4. Also claimed is a similar aluminosilicate glass which is suitable for the float process and which only contains up to impurity level quantities of PbO, As2O3, Sb2O3, ZnO, MgO and B2O3.    USE -   Used as a substrate glass in display technology, plasma display panels and solar collectors (claimed).    ADVANTAGE -   The glass has a high transition temperature (Tg) of above 650C, a low density () of less than 2.800 g/cm3, a thermal expansion coefficient (20/300) of 8.1-9.0x10-6 /K and good chemical resistance and can be produced as sheet by the float process.