... Thickness: 2.8mm,Website:http://www.migoglass.com, 3.2mm, 4.0mmApplications:Cover glass for solar thermal collector Glass backsheet ... glass in continuous tempering furnace. After tempering treatment, it is 4-5 times stronger than ordinary annealed float glass and, if ... /32"): 89.82%Solar Transmittance 3.2mm (1/8"): 84.67%; 4.0mm ( 5/32"): 83.04%Certification EN12150, EN12600, CCC, ...