Patent ID: 6841494

Claim:
An ultraviolet/infrared absorbent glass with a medium light transmittance comprising: a base glass including 65 to 80 wt. % SiO 2 , 0 to 5 wt. % Al 2 O 3 , 2 to 10 wt. % MgO (excluding 2 wt. %), 5 to 15 wt. % CaO, wherein a total amount of MgO and CaO is between 7 and 15 wt. % (excluding 7 wt. %), 10 to 18 wt. % Na 2 O, 0 to 5 wt. % K 2 O, wherein a total amount of Na 2 O and K 2 O is between 10 and 20 wt. %, and 0 to 5 wt. % B 2 O 3 ; and colorants including 1.0 to 1.35 wt. % total iron oxide (T-Fe 2 O 3 ) expressed as Fe 2 O 3 , 0.001 to 0.02 wt. % NiO, and 0 to 0.006 wt. % CoO (excluding 0.006 wt. %), wherein said glass with a thickness between 2 mm and 6 mm has a dominant wavelength between 490 and 550 nanometers measured by C.I.E. illuminant C, no more than 15% of an ultraviolet transmittance (Tuv) specified by ISO, and less than 8% of an excitation purity, said glass with a thickness of 4 mm has a visible light transmittance (YA) of not less than 51% and not more than 59.1%, and no greater than 42% of a solar energy transmittance (TG), and said glass has less than 65% measured by C.I.E. illuminant A and less than 50% of a solar energy transmittance (TG) based on a thickness of 2.8 mm.