BS EN 14179-1:2005: Glass in building-Heat soaked thermally toughened soda lime silicate safety glass-Definition and description.
Heat soaked thermally toughened soda lime silicate safety glass has a safer breakage behavior when compared with annealed glass. It also has a known level of residual risk of spontaneous breakage arising from the possible presence of critical nickel sulfide (NiS) inclusions in the thermally toughened soda lime silicate glass.