Determine the propensity of the grain of leathers to crack during bending, this test is applicable to all leather soles.
One leather sample of measured thickness is bent around a series of numbered mandrels of decreasing diameter until either grain cracking occurs or the smallest mandrel has been used. Grain crack index is then calculated by multiplying test piece thickness by mandrel number.

Supplied with: operating instructions, conformity/calibration certificate
Standards: SATRA TM48; ISO 3378; SLP 8; IUP 12; DIN 53324
Power consumption:
Power supply: Not necessary