A process to strengthen a vitreo, vitrocristalino or ceramic body. (Machine-translation by Google Translate, not legally binding)

摘要

A process to strengthen a vitreous, vitreous crystalline or ceramic body, in which process compressive forces are produced in the superficial layers of the body through a chemical quenching treatment in which an ion exchange takes place between the superficial layers of said body and a liquid or gaseous medium through a coating layer adhering to said body and applied thereto prior to the chemical quench treatment, and in the process of which said layer is formed or modified after the chemical quenching treatment has begun to form a coating crystalline or partially crystalline with a surface hardness greater than that of the coated surface. (Machine-translation by Google Translate, not legally binding)