Tempered Heat Soaked Glass

Heat-soak process

• Tempered panes undergo a 4–5-hour oven cycle, including a two-hour hold at 290 °C.
• Heat forces panes containing nickel-sulfide inclusions to fail in the oven before installation.
• Risk falls from roughly 8 per 1,000 to 4 per 10,000 panes, around a 95% reduction, but is not eliminated.

Advantages

• The soak process does not alter the mechanical properties of tempered glass
• Forces panels with NiS defects to break in the oven, before installation
• Greatly reduces the risk of spontaneous breakage in service
• Ideal where glass replacement after installation is difficult or costly
• Retains tempered-glass strength, 290 °C heat resistance and 150 °C thermal-shock resistance

Cautions

• Cannot be cut, drilled, notched or edge-worked after tempering; controlled roller wave or bow may remain.
• Minimum size is 180 × 180 mm; confirm dimensions and installation clearances before production.
• Do not use a single pane for roofs, high-rise façades, floors, stairs or fire barriers.

Specifications