Abstract: A flat glass panel for use in applications requiring high visible and infrared transmittance (such as a solar panel) is made using lower cost batch materials containing iron oxide impurities. Iron oxide is known as an additive for decreasing infrared/visible transmittance of glass. Removal of iron oxide impurities from batch materials is very expensive. This invention uses common batch materials having iron oxide impurities to produce a glass with high transmittance by adding a clarifier comprised of 0.05 to 0.4 weight percent of manganese dioxide (MnO2). The optional addition of vanadium pentoxide (V2O5) enhances ultraviolet blocking of the glass for protecting coatings within a solar panel from ultraviolet-induced damage.

Abstract: A colored glass is provided that includes a base material and a colorant including Fe2O3 and Se. The Fe2O3 and Se are combined in the frit or glass as a Fe2O3—Se complex before being added with the base material.

Abstract: A blue glass composition comprises a soda-lime-silica base and a colorant portion consisting essentially of about 0.4 to 0.65 weight percent total iron oxide, about 0.1 to 0.3 weight percent manganese oxide, and cobalt oxide in an amount effective to produce a cobalt concentration of about 0.0002 to 0.0013 weight percent (about 2 to 13 ppm). The glass is characterized by a ratio of ferrous oxide to total iron oxide between about 0.43 and 0.58. The glass composition exhibits a combination of high visible transmittance, high infrared absorption and enhanced blue coloration. This is attributed in large part to the combination of ferrous oxide and cobalt oxide and to the effect of manganese oxide in reducing iron sulfide formation and thereby avoiding amber coloration.

Abstract: A neutral gray, heat absorbing soda-lime-silica glass having at 4 mm. control thickness a light transmittance using illuminant A of 10.0% to 55.0%, ultra violet transmittance less than 25.0%, and infra red transmittance is less than about 50.0% produced with colorants consisting of 0.90 to 1.90 percent by weight total iron oxide as Fe.sub.2 O.sub.3, 0.002 to 0.025 percent Co, 0.0010 to 0.0060 percent Se, 0.10 to 1.0 percent MnO.sub.2, and 0 to 1.0 percent TiO.sub.2. The flat glass products having such a composition is particularly suitable for use as a privacy glass or sun roof product in trucks and automobiles.

Abstract: A heat absorbing, neutral gray to green, soda-lime-silica glass having at 4 mm. control thickness a light transmittance using illuminant A of 10.0% to 60.0%, ultra violet transmittance less than 25.0%, infra red transmittance is less than about 50.0%, and the purity of excitation is less than 6.0% which is produced from colorants consisting of 0.90 to 1.90 percent by weight total iron oxide as Fe.sub.2 O.sub.3, 0,002 to 0.025 percent Co, 0.0010 to 0.0060 percent Se, and 0.1 to 2.0 percent TiO.sub.2. The flat glass products having such a composition is particularly suitable for use as a privacy glass or sun roof product in trucks and automobiles.

Abstract: Material selected from the group consisting essentially of molybdenum, arsenic, antimony, bismuth, copper, silver, potassium dichromate and iron chromite, is added during the manufacture of soda-lime-silica float glass to reduce the occurrences of nickel sulfide stone defects. Material is added in sufficient amounts such that the resulting glass is at least 0.010 wt. % selected material. In a preferred embodiment of the invention, molybdenum is added in the form of sodium molybdate such that the resulting glass is at least 0.015 wt. % molybdenum.

Abstract: A neutral gray, heat absorbing soda-lime-silica glass having at 4 mm. control thickness a light transmittance using illuminant A of 10.0% to 55.0%, ultra violet transmittance less than 25.0%, and infra red transmittance is less than about 50.0% produced with colorants consisting of 0.90 to 1.90 percent by weight total iron oxide as Fe.sub.2 O.sub.3, 0.002 to 0.025 percent Co, 0.0010 to 0.0060 percent Se, 0.10 to 1.0 percent MnO.sub.2, and 0 to 1.0 percent TiO.sub.2. The flat glass products having such a composition is particularly suitable for use as a privacy glass or sun roof product in trucks and automobiles.

Abstract: A glass, which is particularly adapted to be melted in conventional glass melting furnaces and formed on a molten tin bath, and which demonstrates exceptional absorption of X-rays with a minimum linear absorption coefficient, measured at 0.6 Angstroms, of 24/cm. and having excellent resistance to electron browning and/or X-ray browning and contains the following components, by weight percent: SiO.sub.2 and Al.sub.2 O.sub.3 constituting about 57.0 to 68.0% with SiO.sub.2 constituting about 57.0 to 66.0% and Al.sub.2 O.sub.3 constituting about 0 to 5.0%; K.sub.2 O and Na.sub.2 O constituting about 10.0 to 18.0% with K.sub.2 O constituting about 7.0 to 11.0% and Na.sub.2 O constituting about 4.0 to 8.0%; BaO and SrO constituting about 16.0 to 24.0% with BaO constituting about 0 to 13.0% and SrO constituting about 11.0 to 21.0%; and CeO.sub.2 constituting about 0.1 to 1.0%.

Abstract: A glass composition particularly suitable for flat glass manufacture having lower melting temperature, wide working range, improved surface durability, and enhanced tempering performance has the following composition:______________________________________ SiO.sub.2 66.0-69.1 weight percent Al.sub.2 O.sub.3 2.0-4.0 (SiO.sub.2 + Al.sub.2 O.sub.3) Less than 71.6 Na.sub.2 O 15-19 K.sub.2 O 0-2 (Na.sub.2 O + K.sub.2 O) 15-20 CaO 7.5-9 MgO 2-4 (CaO + MgO) 10.2-12.0 (CaO/MgO) 1.9-3.5 ______________________________________ .

Abstract: A neutral, dark gray, nickel-free, soda-lime-silica glass having luminous transmittance less than 20 percent is produced with colorants consisting essentially of 0.55 to 1.0 percent by weight total iron (at least 15 percent in the ferrous state), 0.005 to 0.02 percent CoO, and 0.003 to 0.02 percent Se. The flat glass product having such a composition is particularly suitable for use in sun roofs.