Method for improving the durability of spontaneous NaF opal glas

Details Method for improving the durability of spontaneous NaF opal glas Method for improving the durability of spontaneous NaF opal glas

1978-05-08

1980-02-05

Bashore, S. Leon

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 30E, 65DIG14, 65 31, 106 731, 106 54, C03C 1500, C04B 3500

Patent

active

041870948

ABSTRACT:
Spontaneous sodium fluoride opal glassware is treated to improve surface durability against aqueous attack by controlled sodium depletion and subsequent heat consolidation of the glass surface. The method comprises extracting surface sodium ions using water or dilute aqueous acidic solutions and subsequently consolidating by heat the surface to produce a glossy surface without any migration of sodium ions.

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patent: 4086074 (1978-04-01), Minot et al.
patent: 4107388 (1978-08-01), Gambaretto et al.

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