Glass article protected from coloring by electron rays and method of using

摘要

The instant invention relates to soda-lime-silica glass articles, having a surface which is resistant to coloring by electron rays which is suitable for use as the glass panel of a cathode ray tube. Said glass article being produced by a float process, and said surface having the sodium ions exchanged with lithium and at least one of potassium, rubidium, and cesium ions. In another aspect of the invention a soda-lime-silica glass containing 0.2-1.5% by weight of Li2O having the sodium ions in at least one surface exchanged with potassiums is produced, such that the ratio of Na2O/(Na2O+K2O) is 0.2-0.6 for a depth of 0.5 microns from said surface.