METHOD FOR MEASURING FINING TIME OF GLASS*

1 October 1945

journal article
Published by Wiley in Journal of the American Ceramic Society

Vol. 28 (10) , 282-287
https://doi.org/10.1111/j.1151-2916.1945.tb14493.x

Abstract

A method is described for measuring the fining time of glass, and a formula is given for using the data obtained to estimate the tonnage‐temperature schedules of continuous tank furnaces. Measurement of fining time at two and preferably three temperatures, in the range 1400° to 1500°C., is required to establish the fining characteristics of a glass. Data from fining‐time measurements of four glasses show that fining is largely independent of the viscosity and probably also of the surface tension of glass.The use of fining‐time measurements in accounting for differences in the melting efficiencies of tank furnaces and the value of systematic studies, involving fining agents and variations in composition, are suggested.

Keywords

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