Tempered glass is produced by heating the glass pane to a temperature of more than 600 °C, after which it is rapidly cooled by air symmetrically on both sides of the pane. This creates a pre-tension on the glass, which means that the surfaces of the glass pane experience compressive stress and the middle part of the pane experiences tensile stress. Tempered glass can have up to 5 times the strength of ordinary glass. In case of breakage, tempered glass breaks into small shards with no sharp edges. The glass can also be laminated to keep the shards attached to a film. After tempering, the glass can no longer be processed, so the necessary grinding, cutting, hole cutting and other processing must be carried out before the glass can be tempered.
The maximum glass size is 6000 x 3300 mm. All of Jaakko-Tuote Oy’s tempered glass panes, straight and bent, are available in laminating quality, so they meet the requirements of DIN and EN standards and are CE marked.
Typical applications of tempered-glass panes are facade glazing, space divider glazing, balcony and rail glazing, and glazing for sports facilities such as squash halls.