Patent ID: 6962886

Claim:
A glass composition comprising: SiO 2 55 to 58 percent by weight; Al 2 O 3 12 to 16 percent by weight; CaO 23 to 26 percent by weight; MgO 2.5 to 3 percent by weight; TiO 2 0.5 to 2 percent by weight; Na 2 O 0 to 1 percent by weight; K 2 O 0 to 1 percent by weight; Na 2 O + K 2 O 0 to 2 percent by weight; Fe 2 O 3 0.1 to 0.5 percent by weight; B 2 O 3 1 to 2 percent by weight; wherein the glass composition has a log 3 forming temperature no greater than 1230° C. based on NIST 710A reference standard, and the difference between the log3 forming temperature and the liquidus temperature is at least 50° C.