Laboratory beating of pulp (PFI mill method), Test Method TAPPI/ANSI T 248 sp-15
This standard practice describes the processing of pulp by means of the PFI mill (1) to evaluate pulp
quality for papermaking.
In principle, the standard practice applies to all types of pulp; in practice, the method may not give
satisfactory results with certain very long-fiber pulps such as cotton.
The standard practice is suited to processing small quantities of test specimens that are too small for
processing in the Valley beater, as described in TAPPI T 200 “Laboratory Processing of Pulp (Beater Method).”