Photobleaching characteristics of traditional Japanese paper in a museum environment
Kosuke Nakagoshi, Kunio Yoshizumi
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DOI: 10.4236/ns.2011.311121   PDF    HTML     4,542 Downloads   8,734 Views   Citations

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.

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Nakagoshi, K. and Yoshizumi, K. (2011) Photobleaching characteristics of traditional Japanese paper in a museum environment. Natural Science, 3, 948-954. doi: 10.4236/ns.2011.311121.

Conflicts of Interest

The authors declare no conflicts of interest.

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