High visible, low UV and low IR transmittance green glass composition

Claim 1

A green-colored infrared energy and ultraviolet radiation absorbing glass consisting essentially of SiO 2 , Na 2 O, CaO, about 0.20-0.25% SO 3 , about 0.7-0.95% total iron expressed as Fe 2 O 3 , about 0.19-0.24% ferrous iron expressed as FeO, and wherein said glass when between about 3.7 mm-4.8 mm thickness has a visible transmittance of greater than about 70%, an ultraviolet radiation transmittance of less than about 38% and a total solar transmittance of less than about 44.5%.

Claim 11

The method of forming a green glass which consists essentially of, on an oxide basis: ______________________________________ Material wt. % ______________________________________ Na.sub.2 O about 13.75 MgO about 3.90 Al.sub.2 O.sub.3 about 0.15 SO.sub.3 about 0.23 K.sub.2 O about 0.04 CaO about 8.72 (Total iron as) Fe.sub.2 O.sub.3 about 0.78 SiO.sub.2 about 72.41 FeO about 0.19 ______________________________________ said green glass when between about 3.7 mm-4.8 mm thickness having a visible transmittance of greater than about 70%, an ultraviolet radiation transmittance of less than about 38% and a total solar transmittance of less than about 44.5%; the steps including forming said glass from a batch material consisting essentially of by weight: ______________________________________ Material wt. % ______________________________________ Sand about 59.66 Soda Ash about 18.68 Dolomite about 14.57 Limestone about 4.86 Salt Cake about 1.55 Iron Oxide about 0.62 Carbon about 0.06. ______________________________________

Claim 12

The method of forming a green glass which consists essentially of, on an oxide basis: ______________________________________ Material wt. % ______________________________________ Na.sub.2 O about 13.75 MgO about 3.90 Al.sub.2 O.sub.3 about 0.15 SO.sub.3 about 0.23 K.sub.2 O about 0.04 CaO about 8.72 (Total iron as) Fe.sub.2 O.sub.3 about 0.78 SiO.sub.2 about 72.41 FeO about 0.19 ______________________________________ said green glass when between about 3.7 mm-4.8 mm thickness having a visible transmittance of greater than about 70%, an ultraviolet radiation transmittance of less than about 38% and a total solar transmittance of less than about 44.5%; the steps including forming said glass from a batch material consisting essentially of by weight: ______________________________________ Material wt. % ______________________________________ Sand about 59.66 Soda Ash about 18.68 Dolomite about 14.57 Limestone about 4.86 Salt Cake about 1.55 Iron Oxide about 0.62 Carbon about 0.06. ______________________________________

Claim 13

The method of forming a green glass which consists essentially of, on an oxide basis: ______________________________________ Material wt. % ______________________________________ Na.sub.2 O about 13.67 MgO about 3.91 Al.sub.2 O.sub.3 about 0.17 SO.sub.3 about 0.21 K.sub.2 O about 0.04 CaO about 8.70 (Total iron as) Fe.sub.2 O.sub.3 about 0.889 SiO.sub.2 about 72.41 FeO about 0.22 ______________________________________ said green glass when between about 3.7 mm-4.8 mm thickness having the following characteristics: ______________________________________ Characteristic Range ______________________________________ Illuminant A (visible transmittance) >70% UV transmittance <38% Total Solar transmittance <44.5% IR transmittance 18%-21% Illuminant C about 495-510 nm dominant wavelength Illuminant D-65 L about 87%-91% a about -8 ± 3 b about 2 ± 2 Color purity about 2%-4% ______________________________________ the steps including forming said glass from a batch material consisting essentially of by weight: ______________________________________ Material wt. % ______________________________________ Sand about 59.60 Soda Ash about 18.66 Dolomite about 14.56 Limestone about 4.86 Salt Cake about 1.55 Iron Oxide about 0.71 Carbon about 0.06 ______________________________________ and wherein during said forming of said glass the total iron expressed as Fe 2 O 3 is reduced about 27%.

Claim 14

The method of forming a green glass which consists essentially of, on an oxide basis: ______________________________________ Material wt. % ______________________________________ Na.sub.2 O about 13.67 MgO about 3.91 Al.sub.2 O.sub.3 about 0.17 SO.sub.3 about 0.21 K.sub.2 O about 0.04 CaO about 8.70 (Total iron as) Fe.sub.2 O.sub.3 about 0.889 SiO.sub.2 about 72.41 FeO about 0.22 ______________________________________ said green glass when between about 3.7 mm-4.8 mm thickness having the following characteristics: ______________________________________ Characteristic Range ______________________________________ Illuminant A (visible transmittance) >70% UV transmittance <38% Total Solar transmittance <44.5% IR transmittance 18%-21% Illuminant C about 495-510 nm dominant wavelength Illuminant D-65 L about 87%-91% a about -8 ± 3 b about 2 ± 2 Color purity about 2%-4% ______________________________________ the steps including forming said glass from a batch material consisting essentially of by weight: ______________________________________ Material wt. % ______________________________________ Sand about 59.60 Soda Ash about 18.66 Dolomite about 14.56 Limestone about 4.86 Salt Cake about 1.55 Iron Oxide about 0.71 Carbon about 0.06 ______________________________________ and wherein during said forming of said glass the total iron expressed as Fe 2 O 3 is reduced about 27%.