Norma ASTM D4917

Standard Test Method for Coefficient of Static and Kinetic Friction of Uncoated Writing and Printing Paper by Use of the Horizontal Plane Method

Test Materials

ASTM D4917 focuses on uncoated writing and printing papers. The test evaluates how these materials slide against themselves, simulating conditions such as those in printing presses or copier machines.

Test Process

The test uses a horizontal plane setup where a sample slides against another under an applied weight. The coefficient of static friction measures the force needed to initiate movement, while the kinetic friction measures the force needed to maintain uniform sliding. This test method ensures precision, particularly for uncoated papers.

Test Result Interpretation

Results provide the coefficient of friction values. A higher static COF indicates more resistance to initial movement, while kinetic COF represents resistance during continuous motion. These values help ensure proper paper handling and feedability in machines​