For shoe uppers, clothing materials, bag leather, artificial leather, etc., cut a 45X70mm test piece at a speed of 100C.P.M at a speed of 22.5 to flex the test piece, and record the number of flexure resistance when the test piece cracks. Or after flexing the test piece a fixed number of times, observe whether there are cracks.
CNC-7705,JIS-K6545, BS-3144 ASTM-D2813
