To test the paper, the specimen is mounted on the tester using the clamping system. Located at the pendulum, the lower faces of the clamp jaws are at the centre. The jaws adjust themselves according to the different thickness of the test paper. To get the accurate test results, the test and angle of deflection are kept constant. To get the value of the test, the load is applied on the lower end of the specimen. It is the perfect way to determine the quality of the paper. Stiff resistance tester helps in segregating the substandard paper from the high quality. It is one of the most important test instrument used in paper industry. Presto offers this instrument at very competitive prices. Calibration certificate is provided along with the instrument. This certificate is valid for one year.