Patent ID: 6374640
Filing Date: 2002-04-23
Classification: C03B

Abstract:
A method of compacting flat glass panes, said method comprising the steps of:a) cleaning at least one flat glass pane to be compacted wherein said cleaning includes a chemical treatment for cleaning said flat glass panes to be compacted, said chemical treatment comprising the steps of: a) immersing the flat glass panes in an alkaline solution having a pH of more than 10; b) treating said flat glass panes with distilled water; c) treating said flat glass panes with an acidic medium having a pH of less than 4, said acidic medium optionally containing surfactants; d) rinsing said flat glass pane again with distilled water; and e) drying the flat glass panes; b) after the cleaning of step a), placing said at least one flat glass pane to be compacted on at least one ceramic panel; and then c) performing a heat treatment of said at least one flat glass pane together with said at least one ceramic panel in a radiation furnace at temperatures of from 300Â° C. to 900Â° C. without a release agent applied to said at least one flat glass pane; wherein said at least one ceramic panel has a thermal conductivity which is at least five times that of said at least one flat glass pane in a temperature range in which said at least one flat glass pane is subjected to said heat treatment.