Notes on a Method of Determining the Viscosity of Molten Glass

JSGT 1932 V16 T043-T051

A description is given of the method and the apparatus used in the determination of viscosities of molten glasses, using a falling platinum sphere and x-ray photography. Using a glass containing tube (of fine grained sillimanite) of 2-inch diameter, the diameter of the platinum spheres should be less than 2·8 mm. Photographic exposures were taken at 1-minute intervals with the glass temperature at 1100° and at 12  hour intervals at 800°.

A. R. Wood