Patent ID: 7932198

Claim:
A grey glass comprising: a base glass portion comprising: Ingredient wt. % SiO 2 67-75% Na 2 O 10-20% CaO 5-15% MgO 0-7% Al 2 O 3 0-7% K 2 O 0-7% and a colorant portion consisting essentially of: total iron (expressed as Fe 2 O 3 ) 0.20 to 0.40% selenium 2-20 ppm cobalt oxide 0.0025 to 0.0060% titanium oxide less than 1.0% wherein the grey glass contains titanium oxide and has, at a reference thickness of 6 mm, a redox value (FeO/Fe 2 O 3 ) of no greater than 0.30, a visible transmittance (Lta) of from 59-66%, UV transmission of from 25-32%, a dominant wavelength in the range of from 470 nm to 555 nm, an excitation purity (Pe) of no greater than 5.0%, and an IR transmittance (% IR) of from 38-50%.