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The following information is based on a typical 190*190*80mm clear glass block
Composition : Silica-sand, soda ash, calcium.
Fusion is obtained at approximately 1550OC.
Light Transmission
Clear 190x190x80 = 80%
Coloured 190x190x80 = 60%
Thermal Transmission
Average value = 2.9 W/m² °C : Single Wall.
Impact Strength
12.0 N/mm - Tested using 50kg sand bag and steel ball bearings.
Sound Transmissions
Rw = 42dB depending on freque











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