Abstract
1. Chainlength distributions of four samples of rayon-grade beech pulp were compared with those of four samples of same-grade soft pulp. They were manufactured in laboratory, domestic mills and foreign mills respectively. The conditions of sulfite digestion, refining and bleaching were believed to be different from each other.Chainlength distributions were determined at various occasions by the same person in our laboratory.2. Even if beech pulp has the degree of polymerization (d. p) equal to soft wood pulp, the spreads of higher d. p fractions were more narrow (See Fig. 1, 2, 3) and the shapes of chainlength distribution curves were not gently-sloping and had a sharp peak at higher d. p. region. (See Fig. 4)3. These features are considered as resulted from the chainlength distribution of wood fibre in beech pulp.(See our former paper; J. Chem. Soc. Japan, Ind. Chem. Section, 54, 670 (1951))
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