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

INDUSTRIAL APPLICABILITY The present invention is a method for reducing the warpage of the glass plate, which is generated by performing chemical strengthening treatment on a glass plate produced by the float method. In the method of the present invention, a glass plate produced by the float method is held in the temperature range of the glass at a strain point of-70 to a strain point + 20 for 10 minutes or longer before the chemical strengthening treatment is performed.;