Process for production of molded glass article
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United States of America Patent
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Aug 25, 1992
Grant Date -
N/A
app pub date -
Feb 20, 1991
filing date -
Feb 28, 1990
priority date (Note) -
Expired
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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.
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