TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Method: The method further comprises: controllably cooling portions of the pool of molten glass to provide a glass, where the glass has a content of iron (III) oxide of 0.005-0.120 wt.% and a redox ratio of less than 0.550, the glass has less than 0.0026 (preferably less than 0.0025) wt.% of cerium oxide powder, and spectral properties of the glass measured at a thickness of 5.5 mm comprises: a visible transmission of greater than 85% measured using C.I.E. standard illuminant A with a 2 degrees observer over a wavelength of 380-770 nm; a total solar infrared transmittance of greater than 87% measured over a wavelength of 775-2125 nm; and a total solar energy transmittance of greater than 89% measured over a wavelength of 300-2500 nm, where the total solar infrared transmittance and the total solar energy transmittance are calculated using Parry Moon air mass 2 direct solar irradiance data and ASTM air mass 1.5 global solar irradiance data respectively, and integrated using the rectangular rule and trapezoidal rule, respectively; and moving oxygen gas through the pool of molten glass, where flow of the oxygen gas is present in a direction from bottom of the pool of molten glass to top of the pool. Preferred Components: The oxygen firing ratio of the ignited mixture is greater than 2.31, where the oxygen fuel ratio is determined as the total flow of the combustion gas with all burner time equal to the percent of oxygen in the combustion gas divided by total flow of the fuel gas to the burners. The oxygen firing ratio is 2.31-2.71, preferably greater than 2.71. The molten glass further comprises 0-0.0800 wt.% of cerium oxide powder, preferably less than 0.0025 wt.%. The cerium oxide powder is 0-0.0025 wt.%, where the redox ratio is less than or equal to 0.350. The spectral properties comprise: the visible transmission of greater than 87% (preferably greater than 90%); the total solar infrared transmittance of greater than 89% (preferably greater than 90%); and the total solar energy transmittance of greater than 90%. The total iron as iron (III) oxide is 0.005-0.025 wt.%, where the redox ratio is less than 0.350. The batch materials are melted as the batch materials float on surface of the pool of molten glass and moving the oxygen gas bubbles is accomplished by moving a spaced streams of oxygen gas bubbles upward through the pool of molten glass toward the surface of the pool of molten glass from a position below the surface of the pool of molten glass and downstream from the melting batch materials, where the streams of gas bubbles are in a line transverse to direction or flow of the molten glass. The furnace comprises several overhead burners disposed in the region of the sidewalls of the furnace, where each of the burners is able to develop a flame transversely to the axis of the furnace. The overhead burners are disposed regularly upstream to downstream and are arranged in pairs of burners facing each other, where the burners of each pair operating alternately so that at a given instant only burners disposed in the region of one of the sidewalls develop a flame. The furnace comprises 6-8 pairs of burners and only the two or three pairs of burners situated furthest downstream, or the last pair of burners situated furthest downstream, are fed with an over-stoichiometric quantity of oxidant. The furnace comprises a first chamber delimiting a glass melting zone and then a refining zone and then a second chamber delimiting a cooling zone for molten glass, all the burners being disposed in the region of the first chamber from upstream to downstream. The burners are fed with air and fuel. The fuel is natural gas and/or fuel oil. The overstoichiometric quantity of oxidant is such that the molar ratio of oxygen to fuel is 1.05-1.5. The glass sheet is formed by floating on a bath of tin. The partial pressure of oxygen above the glass bath is 4-7%. The iron oxide content is less than 0.015%. The redox is 0.20-0.30. The sulfur trioxide content is greater than or equal to 0.2%. The glass sheet comprises oxides or metals comprising cerium oxide powder, cobalt oxide, molybdenum, chromium(III) oxide, manganese dioxide, vanadium (V) oxide and selenium. The glass sheet produced by a process comprises floating on a tin bath. The glass sheet is: coated with at least an antireflecting coating; or coated with an antireflecting layer on a second face. The oxidizing gas is bubbled within the glass bath during the cooling. The oxidizing gas is oxygen. The bubbling creates within the glass bath, and the bubbles have an average diameter of 0.05-5 cm. The oxidizing gas bubbled within the glass bath is such that a total amount of oxygen introduced into the glass bath is 0.01-20 l/kg of glass. The oxidizing gas is bubbled by at least one porous refractory ceramic part. The viscosity of the glass during bubbling is 100-1000 poise. The glass comprises more than 50 wt.% of silicon dioxide. The glass obtained has a redox of less than or equal to 0.1. The glass obtained comprises a total iron oxide content of less than or equal to 0.15 wt.%. The substrate comprises a total iron oxide content of less than or equal to 0.02 wt.%. The substrate comprises a total iron oxide content which is greater than 0.02% and less than or equal to 0.15%.