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The freeness of pulp is designed to give a measure of the rate at which a dilute suspension of pulp (3 g of pulp in 1 L ofwater) may be drained. The freeness, or drainage rate (see TAPPI T 221 "Drainage Time of Pulp"), has been shown to berelated to the surface conditions and swelling of the fibers. Besides these factors, the result is dependent also onconditions under which the test is carried out, such as stock preparation, temperature, and water quality. The applicabilityof this method to all types of pulps has not been determined.

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Published: 01/01/2009 Number of Pages: 13File Size: 1 file , 870 KB