TAPPI T 549 OM 2013

Official TAPPI test method for measuring the static and kinetic friction coefficients of uncoated writing and printing paper using a horizontal plane apparatus.

TAPPI T 549 om-13 provides a standardized horizontal plane procedure for determining the coefficients of static and kinetic friction in uncoated writing and printing paper. The method covers applicable documents, terminology, apparatus, sampling, specimen preparation, testing procedures, calculations, reporting requirements, precision data, keywords, and related information. It supports evaluation of paper handling characteristics relevant to sheet feeding in printing presses and copier machines, including testing in and across the machine direction. This digital PDF edition is suitable for paper manufacturers, converters, testing laboratories, quality assurance teams, and technical professionals who need a consistent procedure for friction measurements.

Application Scope: Applies primarily to uncoated writing and printing papers and may support evaluation of other paper types when material-specific precision and accuracy limitations are considered.