METHOD FOR REDUCING WARPAGE DEVELOPING IN GLASS PLATE DUE TO CHEMICAL STRENGTHENING TREATMENT, METHOD FOR PRODUCING GLASS PLATE FOR CHEMICAL STRENGTHENING, AND METHOD FOR PRODUCING CHEMICALLY STRENGTHENED GLASS PLATE

摘要

The present invention is a method for reducing the warpage of the glass plate caused by subjecting a glass plate manufactured by a float method to a chemical strengthening treatment. In the method of the present invention, before the chemical strengthening treatment is carried out, the glass plate produced by the float method is maintained within a temperature range of the strain point of the glass -70°C to +20°C for 10 minutes or more.