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TAPPI UM 221

M00004056

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TAPPI UM 221 Laboratory processing of pulp (plate refiner)

standard by Technical Association of the Pulp and Paper Industry, 01/01/2011

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This method concerns the processing of pulp by means of a laboratory plate refiner prior to forming handsheets, forthe purpose of determining its behavior when subjected to a definite schedule. [See also TAPPI T 200 "LaboratoryProcessing of Pulp (Beater Method)," TAPPI T 248 "Laboratory Beating of Pulp (PFI Mill Method)," UM 253"Laboratory Processing of Pulp (Ball or Pebble-Mill Method)," and UM 258 "Laboratory Processing of Pulp(Kollergang Method)."] Only the furnishing and processing of the stock and the withdrawal and dilution of samplesare described.Safety precautions