Patent ID: 7732360

Claim:
A colorless glass composition having a base glass composition, comprising, in weight percentage: from 70 to 75% of SiO 2 , from 10 to 15% of Na 2 O, from 5 to 10% of CaO, from 0 to 5% of MgO, from 0.0 to 3% K 2 O, from 0.1 to 1.0% Al 2 O 3 % and compounds consisting of from about 0.01 to 0.03% of Fe 2 O 3 from about 20 to 30% reduction (Fe 2+ ) and from about 0.2 to 1% of TiO 2 (Ti 4+ ), the glass having a visible light transmission of at least 89%, an ultraviolet radiation transmittance of no more than 81%, solar direct transmittance of no more than 90%, a dominant wavelength from 600 nm to 490 nm, and a purity of less than 2%.