Patent ID: 7414000

Claim:
A float glass composition consisting essentially of: from 65-75 wt. % of SiO 2 ; from 10-20 wt. % of Na 2 O; from 5-15 wt. % of CaO; from 0-5 wt. % of MgO; from 0-5 wt. % of Al 2 O 3 ; from 0-5 wt. % of K 2 O; from 0-2 wt. % Fe 2 O 3 ; from 0-2 wt. % FeO; from 0.0 to 2.0 wt. % TiO 2 ; and from 0.0 to 2.0 wt. % neodymium, wherein the glass composition has a total field strength index of greater than or equal to 1.23.