JHG fire-resistant glass is combined with borosilicate glass and float glass technology, which fire resistant properties much superior to those of sode lime glass , the main character is : * high performance to bear high temperature , our tempered borosilicate glass 4.0 can withstand 120 minutes fire test . * Ultra light ,borostilicate glass 8% less than sode lime glass * Hign soften point in fire * High ligh transmission * No SO2 pollution ,no self-explosion Borosilicate 4.0 Technical data : Size: 1830*3000mm Density (g/cm�?�³) : 2.28�?�±0.1 Co-efficient of expansion (�?�±)(20-300�¢??) : 4.0�?�±0.1�??10-6k-1 Softening point(�¢??) : 845�?�±10 Light transmission :�?�  �¢?�¥90(6mm) Main usage : 4.0 building partition ,facade ,door ,ceiling ,floor 3.3 household application ,optics , lighting