Heat treating tempered glass panes comprises controlling the starting temperature of the glass panes in the region of a nucleation

摘要

Process comprises controlling the starting temperature of the glass panes in the region of a nucleation of the beta -phase in the alpha -NiS flaws present to a temperature below 250 deg C and above the ambient temperature (nucleation region). The temperature change on the nucleation region is more than 2 K/min. Within the nucleation region for a certain period an essentially slower temperature change is carried out or a specified temperature is held constant. Preferred Features: The temperature of the glass panes within the nucleation region is controlled between 80 and 200, preferably 100 and 180, especially 130 and 160 deg C.