FIELD: pulp-and-paper industry. SUBSTANCE: method consists in fractionation of initial pulp into short-fibered and long-fibered fractions and grinding of long-fibered fraction. In this case, ground long-fibered fraction is additionally fractionated into short-fibered and long-fibered fractions, and separated long-fibered fraction is additionally ground. Grinding of long-fibered fraction produced after fractionation of initial pulp is carried out, particularly, in mixture with long-fibered fraction obtained after additional fractionation. Additional fractionation of long-fibered fraction in mixture with initial pulp and also grinding of long-fibered fraction in mixture with initial pulp are possible. EFFECT: improved quality of paper-making stock due to its reduced polydispersion. 4 cl, 3 dwg, 1 tbl, 5 ex
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