Surface treatment of photothermally crystallizable, chemically- machinable glass-ceramic articles

摘要

This invention is directed to a method for treating the surface of photothermally crystallizable chemically-machinable glass- ceramic articles to render them non-sticking when brought into contact with certain organic materials. More particularly, the invention is drawn to the treatment of photothermally crystallizable, chemically-machinable glass-ceramic head pads for use in conjunction with information storage discs with SO.sub.2 vapors to render them non-sticking with respect to those discs.