1) Paperboard Stiffness Test. It is the amount of force required to bend a board sample by 7.5° or 15°
2) Creasing Stiffness Test. It is the amount of force required to bend a pre-creased sample by 90°
3) Crease Recovery. It is the residual (spring back) force after 15 seconds of bending.
4) Crease Recovery Ratio. It is the ratio between Creasing Stiffness value and Crease Recovery value.
Creasing and Stiffness Tester Delux Digital Model with Automatic Sample Rotation. 12,800 PPR stepper motor and drive for ultra smooth and precise motion