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Permanence of Washi(Japanese Paper) (Part II)

Published online by Cambridge University Press:  28 February 2011

Masamitsu Inaba  and
Ryuitiro Sugisita
Masamitsu Inaba
Affiliation:
Tokyo National Universityof Fine Arts and Music, Faculty of Fine Arts, Conservation Laboratory, 12-8 Ueno Park, Taito-ku, Tokyo, 110, Japan
Ryuitiro Sugisita
Affiliation:
Tokyo National Universityof Fine Arts and Music, Faculty of Fine Arts, Conservation Laboratory, 12-8 Ueno Park, Taito-ku, Tokyo, 110, Japan
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Abstract

The change of degree of polymerization (DP), crystallinity and extent of oxidation during deterioration of Washi (Japanese paper) were studied. The extent of decrease of DP of cellulose in the Washi samples correlated with their acidity. The higher DP of cellulose in Washi fiber compared to that in wood fibers contributes to its permanency. It is reported that partial recrystallization of the amorphous regions in fibers during ageing results in a decrease of flexibility of the paper. From measurements of X-ray diffraction, less recrystallization of Kozo, Mitsumata and Gampi papers occurs during ageing treatment. This fact also contributes to the persistence of the strength of Washi through time. From measurements of infrared spectra of Washi samples, the amount of oxidation seems to be minimal.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 185: Symposium G – Materials Issues in Art and Archaeology II , 1990 , 799
Copyright
Copyright © Materials Research Society 1990

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