Grey Glass Having Low Light Transmission

The present invention describes a low light transmission gray glass formed from a composition of soda-silica-calcium glass and a dye. The dye includes Fe2O3 from 1.65 to 3.0%; from 15 to 40% ferrous (% reduction); 0.28 to 1.2% FeO (expressed as Fe2O3); Co3O4 from 0.030 to 0.040%; Selenium from 0.002...

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Bibliographische Detailangaben
1. Verfasser:	Cid Aguilar, José Guadalupe
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	The present invention describes a low light transmission gray glass formed from a composition of soda-silica-calcium glass and a dye. The dye includes Fe2O3 from 1.65 to 3.0%; from 15 to 40% ferrous (% reduction); 0.28 to 1.2% FeO (expressed as Fe2O3); Co3O4 from 0.030 to 0.040%; Selenium from 0.0020 to 0.010%; CuO from 0.00050 to 0.050%; and, TiO2 from 0.01 to 1%. The glass has a light transmission of illuminant A (TLA) no greater than 15%, a direct solar energy transmission (TDS) no greater than 14%, a near infrared radiation transmission (TIR) no greater than 14%, an ultraviolet radiation transmission (TUV) no greater than 8%, and a total solar energy transmission (TTS) no greater than 38%, a purity no greater than 50% and a dominant wavelength of 480-590 nm when it has a thickness of 3.85 mm.