Chemi-Thermomechanical Pulping

A method of mechanical pulping. CTMP operates on the same basic principle as thermomechanical pulping, in which wood chips are sandwiched between the two rotating disks of a disk refiner at high temperature and pressure, but in CTMP the wood chips are chemically pretreated before refining, which increases pulp brightness and decreases the presence of shives. (See Mechanical Pulping.)

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