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Zhang, H., Cookson, P. and Wang, X. (2009) Comparative study on accelerated weathering tests of wool fabrics. Textiles Research Journal, 78, 1004-1010. doi:10.1177/0040517507087857

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• TITLE: Photobleaching characteristics of traditional Japanese paper in a museum environment

  AUTHORS: Kosuke Nakagoshi, Kunio Yoshizumi

  KEYWORDS: Traditional Japanese Paper;Photobleaching; Wavelength Sensitivity; Monochromatic Light; Visible Light; Blue Wool Reference; Dosimeter

  JOURNAL NAME: Natural Science, Vol.3 No.11, November 23, 2011

  ABSTRACT: Photobleaching of aged traditional Japanese paper that has been thermally yellowed during storage for 200 years was examined from the standpoint of accumulated light radiation dosage in a museum environment. The light intensity was evaluated using a blue wool reference of the Japan Industrial Standards (JIS) as a dosimeter. The wavelength sensitivity of the photobleaching was compiled under monochromatic light radiation. Color changes in the specimens were measured in tristimuli values in color. by using a color analyzer. The aged pieces of paper were monitored continuously as they were photobleached under three different lighting conditions in a museum environment for 8000 h. The combination of the yellowness index changes of the aged pieces of paper and the color changes of a blue wool reference was interpreted as follows. Photobleaching was governed by accumulated light intensities and was independant upon daily lighting conditions. The wavelength sensitivity of the photobleaching of aged paper showed that the maximum effect occurred at 420 nm in the visible light range. The blue wool reference was confirmed to perform well as a dosimeter.