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A. Okagawa and S.G. Mason. Capillarography: a new surface probe – Prepared discussion contribution. In Fibre-Water Interactions in Paper-Making, Trans. of the VIth Fund. Res. Symp. Oxford, 1977, (Fundamental Research Committee, ed.), pp 581–586, FRC, Manchester, 2018.


Paper is a porous structure containing two broad classes of pore: inter and intra-fibre, and penetration of liquids such as water is determined by the geometries of the two classes. In this brief note we wish to describe a technique and present preliminary results on surface wetting and absorption into single

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