PROCESS FOR PRODUCING GLASS SUBSTRATE FOR FLAT PANEL GLASS

摘要

A process for producing a glass substrate for flat panel glasses which retains satisfactory marring resistance and can be prevented from suffering colloidal-silver coloring; and a glass substrate for flat panel glasses which is obtained by the process. The process produces a glass substrate for flat panel glasses by the float method. It comprises a forming step in which a molten glass is formed on molten tin into a glass substrate and an annealing step in which the glass substrate formed in the forming step is annealed. The process further comprises a first supply step in which an inorganic substance containing an alkali metal is blown against that surface of the glass substrate which was in contact with the molten tin and a second supply step in which after the first supply step, SO₂ gas is blown against that surface of the glass substrate which was in contact with the molten tin.