ASTM D689

Test Materials: ASTM D689 specifies the use of paper samples, which should be cut into standard sizes for consistency. The paper must be conditioned to standard atmospheric conditions before testing.
Test Process: The test involves applying a force to initiate a tear in the paper using a pendulum-type instrument. The sample is clamped securely, and the energy required to propagate the tear is recorded.
Test Result Interpretation: Results are reported in grams, representing the force needed to continue the tear. Higher values indicate greater tear strength, essential for assessing the durability of paper in various applications.