• TAPPI UM 203
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TAPPI UM 203

  • Freeness of pulp (Williams tester)
  • standard by Technical Association of the Pulp and Paper Industry, 04/15/2015
  • Publisher: TAPPI

$25.00$49.00


The Williams freeness tester provides a means of measuring freeness of stock from a beater or other refining equipment. The freeness is measured as the time (seconds) for drainage of 3 g of pulp in 1 L of water (0.3%consistency) through an 80-mesh wire screen.

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