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Significance and Use
4.1 This test method is well suited for measuring the viscosity of glasses between the range within which rotational viscometry (see Practice ) is useful and the range within which beam bending viscometry is useful (see Test Method ). It can be used to determine the viscosity/temperature curve in the region near the softening point (see Test Method ). 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.
1.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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)
ICS Number Code 81.040.01 (Glass in general)
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ASTM C1351M-96(2017), Standard Test Method for Measurement of Viscosity of Glass Between 104 Pa·s and 108 Pa·s by Viscous Compression of a Solid Right Cylinder [Metric], ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top