ASTM-F218 › Historical Revision Information
Standard Test Method for Measuring Optical Retardation and Analyzing Stress in Glass
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Scope
1.1 This test method covers the analysis of stress in glass by means of a polarimeter based on the principles developed by Jessop and Friedel (1, 2).2 Stress is evaluated as a function of optical retardation, that is expressed as the angle of rotation of an analyzing polarizer that causes extinction in the glass.
1.2 There is no known ISO equivalent to this 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.
Significance and Use
4.1 The performance of glass products may be affected by presence of residual stresses due to process, differential thermal expansion between fused components, and by inclusions. This test method provides means of quantitative evaluation of stresses.
Keywords
glass; optical retardation; polarimeter; stress
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15.02 (Glass; Ceramic Whitewares)
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Document Number
ASTM-F218-13
Revision Level
2013 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Oct. 15, 2013
Document Type
Test Method
Page Count
8 pages
Committee Number
C14.04