This part of ISO 9184 specifies a method for the determination of fibre coarseness, which is a fibre property characterizing pulp. The weight factor (determined in accordance with ISO 9184-7) used in the fibre furnish analysis of paper, board and pulp can be calculated from the fibre coarseness. This method is applicable to pulps with relatively intact fibres, such as chemical and semichemical pulps. It does not apply to mechanical and chemimechanical pulps or highly beaten chemical or semichemical pulps.