Patent ID: 8304358

Claim:
A soda-lime-silica glass, comprising: SiO 2 65-75 weight percent Na 2 O 10-20 weight percent CaO 5-15 weight percent MgO 0-5 weight percent Al 2 O 3 0-5 weight percent K 2 O 0-5 weight percent SO 3 0-0.30 weight percent and a colorant portion consisting essentially of: Total iron as Fe 2 O 3 0.005-0.120 weight percent Redox ratio in the range of 0.15-0.286 CeO 2 less than 0.0025 weight percent ZrO 2 less than 0.01 weight percent and TiO 2 less than 0.01 weight percent, and wherein spectral properties of the glass measured at a thickness 5.5 millimeters comprises: a visible transmission of greater than 85% measured using C.I.E. standard illuminant “A” with a 2° observer over a wavelength range of 380 to 770 nanometers; a total solar infrared transmittance of greater than 87% measured over a wavelength range of 775 to 2125 nanometers, and a total solar energy transmittance of greater than 90% measured over a wavelength range of 300 to 2500 nanometers, wherein the total solar infrared transmittance and the total solar energy transmittance are calculated using Parry Moon air mass 2.0 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.