MRP-ST LAB BEN 2015 - Roughness measurement according to the Bendtsen method for MRP-Schnettler test line
There are three common test methods for determining the roughness or smoothness of paper: the smoothness after Bekk, Bendtsen and Parker Print Surf (PPS). MRP and Schnettler recommend roughness measurement according to Bentdsen for uncoated papers or for medium smooth surfaces.
The roughness measurement according to Bendtsen in the automatic test line is characterized by the following characteristics:
The applied measuring principle is called air flow measurement. Here a measuring head of the pressed against the paper and the amount of air that escapes at a defined pressure is a measure for the quality of the paper surface. The results of each measurement are displayed at the differential pressure in ml/min is indicated. The lower the measured value, the more uniform or smoother is the surface.