• TAPPI T221 cm-99
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TAPPI T221 cm-99

  • Drainage Time of Pulp
  • standard by Technical Association of the Pulp and Paper Industry, 08/19/1999
  • Publisher: TAPPI

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This method describes a procedure to determine numerically a measure of the slowness of stock, particularly groundwood or beaten pulps. Drainage time is not necessarily related to freeness of pulp, which is determined by TAPPI T 227 "Freeness of Pulp."

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