Patent ID: 6784129
Filing Date: 2004-08-31
Classification: C03C

Abstract:
An ultraviolet/infrared absorbent low transmittance glass consisting of a base glass and colorants, said base glass consisting essentially of:65 to 80 wt. % SiO2; 0 to 5 wt. % Al2O3; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO, wherein a total amount of MgO and CaO is between 5 and 15 wt. %; 10 to 18 wt. % Na2O; 0 to 5 wt. % K2O, wherein a total amount of Na2O and K2O is between 10 and 20 wt. %; and 0 to 5 wt. % B2O3, and said colorants consisting essentially of:more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3; 0.001-0.030 wt. % CoO; and 0.003-0.2 wt. % NiO.