Abstract
Oriental lacquer film was prepared and exposed to a fluorescent lamp. The color difference and gloss of the surface of the film decreased compared to those of film kept in a dark place by irradiation with the fluorescent light. The percentage of discoloration was 7.0% on a relative scale with an irradiation of 3600 h. The surface of the film was characterized by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The oxygen content of the surface increased considerably with the decrease in triene groups with exposure time. These changes were also observed when the film was exposed in a glass or acrylic plate box. The change of the above properties was not observed when the film was kept in a dark place for more than 4800 h. The results suggest that oriental lacquer film deteriorates even under irradiation with visible light.
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