Patent ID: 8232218

Claim:
A glass article, the glass article having an anneal point and a strain point, wherein the glass article is quenched from a first temperature that is greater than the anneal point of the glass article to a second temperature, wherein the second temperature is less than the strain point of the glass article, the glass article comprising: 60-70 mol % SiO 2 ; 6-14 mol % Al 2 O 3 ; 0-15 mol % B 2 O 3 ; 0-2.5 mol % Li 2 O; 0-20 mol % Na 2 O; 0-10 mol % K 2 O; 0-8 mol % MgO; 0-10 mol % CaO; 0-5 mol % ZrO 2 ; 0-1 mol % SnO 2 ; and 0-1 mol % CeO 2 , wherein 12 mol %≦Li 2 O+Na 2 O+K 2 O≦20 mol % and 0 mol %≦MgO+CaO≦10 mol %, wherein the glass article is substantially free of antimony, barium, and arsenic, and wherein the glass article is ion exchangeable.