... application in lighting,chemical,fireplace,steel,food-machinery,solar energy,optical,semi conductor technology,petroleum and sight glass under high temperature ... of 1200*650mm,1180*850 with the thickness of 1.5,2,2.25,2.75,3,3.3,4 ... ,5,6,8,10,12,15,20,25,30,50mm.Also we can print them with different colour. borofloat optical lenses with ...