Pulps - Laboratory beating - Part 2: PFI mill method (ISO 5264-2:2011)

This document establishes a uniform method for assessing the refining process of cellulosic materials within a controlled laboratory environment. Specifically, it addresses the part of the procedure that utilizes a calendering technique to determine refining characteristics. The protocol outlines the necessary equipment, preparation of test specimens, and the operational steps required to perform the measurement. It defines the conditions under which the fiber suspension is treated and how the resulting changes in fiber properties are quantified. By providing a structured approach, this specification facilitates the comparison of results between different testing facilities and ensures consistency in the evaluation of refining efficiency. The methodology is designed to yield reproducible data that supports the optimization of pulp processing parameters. It serves as a technical reference for laboratories engaged in the analysis of fiber behavior during the refining stage.