2.8 Balance, capable of weighing to the nearest 0.0001 grams.
2.9 Soft bristle brush.
2.10 Shoe A durometer.
2.11 Rubber, thermoplastic rubber, and plastic (typically outsole materials).
3. Procedure
3.1 Testing shall be conducted in a standard laboratory environment of 23 ± 2˚C and 55 ± 10 % RH.
3.2 Sample Preparation:
3.2.1 Using the drilling die, cut three (3) test samples have a diameter of 16.0+/-0.2 mm, from varying locations on the test material. The test material must have a minimum thickness of 6mm. Test samples must have parallel top and bottom surfaces, and side which are perpendicular to the top and bottom surfaces (i.e., cylindrical in shape).
3.2.2 If a sample with a thickness of less than 6mm must be used, it should be cut in the manner described above. The test sample must then be bonded to a second piece of rubber which is also cut in the same manner and has a minimum durometer of 65 Shore A. The two pieces must have a combined thickness of at least 6mm. Cyanoacrylate (“super-glue”) is the recommended adhesive.