The ISO standard only changes the original 40*62.5 fixture to a 40*40 fixture, and the forming test mold has not changed. Since the area of ??the 40*40*160 test block is larger than 40*40 after being folded into two pieces, there is no need to change the test mold.
When calculating, the original 40*62.5*4 is changed to 40*40/1.6*6 for conversion