Patent ID: 6810688
Filing Date: 2004-11-02
Classification: C03C

Abstract:
A process for treating a glass sheet, which comprises:subjecting a glass sheet having a strain point above 540Â° C. simultaneously to at least one ion-exchange treatment on at least part of the surface of the glass sheet and a precompaction treatment, thereby producing a display screen, wherein the glass composition comprises the constituents below, in the following proportions by weight: SiO240 to 75%â€‚Al2O30 to 12%Na2O0 to 9%â€‚K2O3.5 to 10%â€‚â€‰MgO0 to 10%CaO2 to 11%SrO0 to 11%BaO0 to 17%ZrO22 to 8%.â€‰