Process for production of molded glass article

Details Process for production of molded glass article Process for production of molded glass article

1991-02-20

1992-08-25

Lindsay, Robert L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 325, 65 64, 65102, 65111, C03C 2100

Patent

active

051415470

ABSTRACT:
A process for the production of a molded glass article is disclosed, said process comprises the steps of: applying wet treatment to a surface of a lead oxide-containing glass material, thereby forming a hydrated layer having a lower lead oxide content than that of a basic glass; heating the glass material having the hydrated layer; and press-molding the heated glass material. According to the process, a molded glass article having no cloudiness can be obtained and lead is not deposited on the surfaces of the molds used.

REFERENCES:
patent: 2958162 (1960-11-01), Upton
patent: 3434817 (1969-03-01), Hazdra et al.
patent: 3498802 (1970-03-01), Bickford et al.
patent: 4132538 (1979-01-01), Eolin et al.
patent: 4976764 (1990-12-01), Fujino
patent: 5032159 (1991-07-01), Kuwabara et al.

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