This test method is well suited for measuring the viscosity of glasses between the range within which rotational viscometry (see Practice C965) is useful and the range within which beam bending viscometry is useful (see Test Method C1350M). It can be used to determine the viscosity/temperature curve in the region near the softening point (see Test Method C338). This test method is useful for providing information related to the behavior of glass as it is formed into an object of commerce, and in research and development.

1. Scope

1.1 This test method covers the determination of the viscosity of glass from 10⁴ Pa·s to 10⁸ Pa·s by measuring the rate of viscous compression of a small, solid cylinder.

1.2 The values stated in SI units are to be regarded as the standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C338 Test Method for Softening Point of Glass

C965 Practice for Measuring Viscosity of Glass Above the Softening Point

C1350M Test Method for Measurement of Viscosity of Glass Between Softening Point and Annealing Range (Approximately 108 Pas to Approximately 1013 Pas) by Beam Bending (Metric)

Keywords

glass; parallel plate; viscosity ; Compression testing; Cylinders; Glass; Viscosity

ICS Code

ICS Number Code 81.040.01 (Glass in general)

Citing ASTM Standards

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