ASTM F218 - 13(2020)

    Standard Test Method for Measuring Optical Retardation and Analyzing Stress in Glass

    Active Standard ASTM F218 | Developed by Subcommittee: C14.04

    Book of Standards Volume: 15.02


      Format Pages Price  
    PDF 8 $52.00   ADD TO CART
    Hardcopy (shipping and handling) 8 $52.00   ADD TO CART



    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.

    1. 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, 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.

    ASTM Standards

    C162 Terminology of Glass and Glass Products

    C770 Test Method for Measurement of Glass StressOptical Coefficient

    C978 Test Method for Photoelastic Determination of Residual Stress in a Transparent Glass Matrix Using a Polarizing Microscope and Optical Retardation Compensation Procedures

    C1426 Practices for Verification and Calibration of Polarimeters

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method


    ICS Code

    ICS Number Code 81.040.01 (Glass in general)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F0218-13R20

    Citation Format

    ASTM F218-13(2020), Standard Test Method for Measuring Optical Retardation and Analyzing Stress in Glass, ASTM International, West Conshohocken, PA, 2020, www.astm.org

    Back to Top