Patent ID: 7375043

Claim:
A method of making a UV-absorbing glass, which transmits in a visible range, said method comprising melting raw materials to form a melt and producing said melt under oxidative conditions, wherein said melt is free of PbO and has the following composition: SiO 2 55-79% by weight B 2 O 3 3-25% by weight Al 2 O 3 0-10% by weight Li 2 O 0-10% by weight Na 2 O 0-5% by weight K 2 O 0-10% by weight, Wherein Σ Li 2 O + Na 2 O + K 2 O 0.5-16% by weight, MgO 0-2% by weight CaO 0-3% by weight SrO 0-3% by weight BaO 0-3% by weight ZnO 0-3% by weight, Wherein Σ MgO + CaO + SrO + 0-10% by weight, BeO + ZnO ZrO 2 0-3% by weight CeO 2 0-1% by weight Fe 2 O 3 0-1% by weight WO 3 0-3% by weight Bi 2 O 3 0-3% by weight MoO 3 0-3% by weight TiO 2 0.1-10% by weight As 2 O 3 0.01-2% by weight.