ASTM C1279 Glass Stress Test Method

astm c1279 standard test method for edge and surface stress in annealed hs ft glass

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Things about ASTM-C1279-00: Standard test method for non-destructive photoelastic measurement of edge and surface in annealed, heat-strengthened, and fully tempered flat glass

1.1 This test method covers the determination of edge stresses and surface stresses in annealed, heat-strengthened, and fully tempered flat glass products.

1.2 This test method is non-destructive.

1.3 This test method uses transmitted light and is, therefore, applicable to light-transmitting glasses.

1.4 The 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 Surface-stress measuring instruments are designed for a specific range of surface index of refraction.

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