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| During the past 15 years tempering of bent glass has mainly changed to horizontal methods.
| Typical problems occurring during the heating process Heating is the most typical stage of glass tempering; a lot depend on this stage to bring out the product of high standard. Quality of tempered glass is very much influenced by
| The oscillating horizontal tempering furnace developed in the 1970s has been one of the most significant innovations of recent decades, above all commercially.
| In recent years there have been a number of sensational reports in the media about “glass cancer” and “spontaneous glass fracture”, with stories relating to “glass raining down from highrise buildings”.