Method of making glassware having a handcrafted appearance

Details Method of making glassware having a handcrafted appearance Method of making glassware having a handcrafted appearance

1975-02-13

1976-10-19

Douglas, Winston A.

Glass manufacturing

Processes

With pore forming in situ

106 40V, 106 52, C03C 304

Patent

active

039868559

ABSTRACT:
Glassware having small bubbles or blisters that impart a handcrafted appearance to it is made by metering specially formed decomposable granules into a soda-lime glass melt at the feeder of a glass forming machine. The granules are made by coating or wetting an alkali metal nitrate with sodium silicate aqueous solution. They decompose in the melt, but the water glass coating slows the decomposition rate such that the resulting gas inclusions cannot escape from the melt before it has been formed or set in a desired shape in the forming machine.

REFERENCES:
patent: 2268251 (1941-12-01), Haux
patent: 2381945 (1945-08-01), Field et al.
patent: 2955049 (1960-10-01), Booth
patent: 2978340 (1961-04-01), Veatch et al.
patent: 3744984 (1973-07-01), Sato

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