The coefficient of friction tester GM-4 is a measuring instrument developed and manufactured by the Guangzhou Biaoji R&D team based on various test standards of GB, ISO, ASTM and market demand. The measured friction coefficient determines the smoothness and opening difficulty of the film. and uniformity can be accurately determined, so as to correctly guide the production.

It is suitable for measuring the static friction coefficient, dynamic friction coefficient and peel strength of plastic films, composite films, aluminum foils, aluminized films, plates, rubber, ceramics and other materials when sliding.

The Coefficient of Friction Tester equipment performs tests to most of the recognised international test standards including IS0 8295 and ASTM 1894-78.