TEMPERED GLASS AND GLASS

摘要

A tempered glass of the present invention includes, as a glass composition, in terms of mass %, 45 to 75% of SiO2, 0 to 30% of Al2O3, and 0 to 30% of Li2O+Na2O+K2O and has a β—OH value of 0.3 to 1/mm.