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D.C. McIntosh and B. Leopold. Bonding strength of individual fibres. In The Formation and Structure of Paper, Trans. of the IInd Fund. Res. Symp. Oxford, 1961, (F. Bolam, ed.), pp 265–270, FRC, Manchester, 2018.


Microscopic examination of the nature of paper failure, when tensile stresses are imposed upon the sheet, has shown that two important factors governing paper strength are the strength of individual fibres and the strength of bonding between fibres . A satisfactory method of determining individual fibre tensile strength has been published by this laboratory.(1) Using this method, the changes in strength of individual fibres of Loblolly pine springwood and summerwood holocellulose were followed during extraction with alkali of increasing concentration . The results of this work are reproduced in part in Table 1.(1)

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