Patent ID: 7304009

Claim:
Coloured soda-lime glass which comprises: iron in an amount which, expressed by weight of Fe 2 O 3 oxide with respect to the total weight of glass, is between 0.5 and 0.9% (total amount of iron); ferrous iron in an amount which, expressed by weight of Fe 2+ atoms with respect to the total weight of iron atoms present in the glass, is between 25 and 45% (Fe 2+ /total Fe ratio); cobalt in an amount which, expressed by weight of Co with respect to the total weight of glass, is at least 5 parts per million; chromium and/or vanadium, with no titanium oxide being added; manganese is present in an amount which, expressed by weight of MnO 2 with respect to the total weight of the glass, is at most 0.50%; and the glass has: a light transmission, measured under illuminant A and calculated for a thickness of 4 mm, of between 20 and 60% (TLA4), an energy transmission, measured according to the Moon distribution and calculated for a thickness of 4 mm, of between 10 and 50% (TE4) and a dominant wavelength λ D in transmission of less than 489.1 nm, and a selectivity greater than 1.2%.