The document discusses a coefficient of friction tester used to measure the static and dynamic coefficient of friction of materials like plastic films, paper, paperboard, and laminates. It can test the friction of these materials against other surfaces like metal and glass. Maintaining the proper coefficient of friction is important to prevent issues on packaging lines, like film breaking or misregistration. The document provides specifications for different models of the tester, which can automatically calculate the static and dynamic coefficient of friction with high resolution and incorporate data acquisition systems.