ANSI/TAPPI T271-12
This is an automated method by which the numerical and weighted average fiber lengths and fiber lengthdistributions of pulp and paper can be measured using light polarizing optics in the range of 0.1 mm to 7.2 mm.The fiber length can also be measured using the following methods: TAPPI T 232 Fiber Length of Pulp by Projection and TAPPI T 233 Fiber Length of Pulp by Classification.