Papermaking properties of recycled pulp obtained from office paper, thermomechanical and chemithermomechanical pulp were investigated. The optimal refining parameters of recycled pulp and chemithermomechanical pulp such as refining time, rotational disk speed and refiner disk gap, allowing to increase their papermaking properties, were determined. It was found that recycled pulp exhibits the greatest efficiency (among the pulps under investigation) of chemical pulps replacing in the furnish composition of offset printing paper.
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