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TAPPI T234 cm-12 Coarseness of pulp fibers
standard by Technical Association of the Pulp and Paper Industry, 11/01/2012
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This is a method by which the coarseness (weight per unit length) of the fibers in a pulp may beascertained by counting the crossings of a known weight of fibers per unit area on a prepared slide over lines of known length. The crossings are counted with a microscope and mechanical stage, by traversing the slide over a series of 5-cm distances.If it is also required to determine the length of the fibers in a sample in accordance with TAPPI T 232"Fiber Length of Pulp by Projection," instead of using a microscope, the fiber crossings over lines of known equivalent length may be counted when the images of the fibers are projected on a screen as described in T 232.