1.1 This test method covers calibration or verification of calibration, or both, of surface-stress measuring devices used to measure stress in annealed and heat-strengthened or tempered glass using polariscopic or refractometry based principles.
1.2 This test method is nondestructive.
1.3 This test method uses transmitted light, and therefore, is applicable to light-transmitting glasses.
1.4 This test method is not applicable to chemically tempered glass.
1.5 Using the procedure described, surface stresses can be measured only on the “tin” side of float glass.
1.6 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.
ASTM C1377-97(2003)e1 Referenced Document
ASTM C1048 Standard Specification for Heat-Treated Flat Glass--Kind HS, Kind FT Coated and Uncoated Glass
ASTM C1279 Standard Test Method for Non-Destructive Photoelastic Measurement of Edge and Surface Stresses in Annealed, Heat-Strengthened, and Fully Tempered Flat Glass
ASTM C158 Standard Test Methods for Strength of Glass by Flexure (Determination of Modulus of Rupture)
ASTM C162 Standard Terminology of Glass and Glass Products
ASTM C770 Standard Test Method for Measurement of Glass Stressmdash;Optical Coefficient
ASTM C1377-97(2003)e1 history
1997ASTM C1377-97(2009) Standard Test Method for Calibration of Surface/Stress Measuring Devices
2003ASTM C1377-97(2003)e1 Standard Test Method for Calibration of Surface/Stress Measuring Devices
2003ASTM C1377-97(2003) Standard Test Method for Calibration of Surface/Stress Measuring Devices
1997ASTM C1377-97 Standard Test Method for Calibration of Surface/Stress Measuring Devices