RECONDITIONING GLASS-FORMING MOLDS HAVING A SURFACE OXIDIZED TITANIUM-ALUMINUM-NITRIDE GLASS RELEASE COATING

摘要

Glass-forming molds comprising titanium aluminum nitride glass release coatings are reconditioned with aqueous mineral acid solutions comprising fluoride and phosphate ions to provide molds with restored glass release characteristics without recoating, permitting the molding of glass articles from aggressive ion-exchange-strengthenable high-alkali aluminosilicate glasses at high temperatures over extended mold service intervals.