This standard specifies the method for measuring the thickness of Soft Encasement materials using a contact micrometer. Accurate measurement of material thickness is essential to ensure product specifications and evaluate performance. The test method applies to Soft Encasement materials with a thickness range of 4.8 to 15.9 mm, but does not address material acceptability criteria, which are to be determined in consultation between the user and the producer. The standard states the accuracy and deviation of the measurement and emphasizes the effect of the inherent variability of the material on the results. The test method follows the principles of international standards and refers to the relevant ASTM standards. Safety, health and regulatory requirements need to be paid attention to in the use of standards.