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Publication of BE658414ApublicationCriticalpatent/BE658414A/xx
C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B21/00—Nitrogen; Compounds thereof
C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
C01B21/50—Nitrous acid; Salts thereof
C—CHEMISTRY; METALLURGY
C03—GLASS; MINERAL OR SLAG WOOL
C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
C03C21/005—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to introduce in the glass such metals or metallic ions as Ag, Cu