Color Damage of Visible Light on Plain-Woven Silk in Different Conservation States of Paintings and Calligraphy in Collections
Vol. 25, No. 1, pp. 235-242,
Jan. 2024
10.1007/s12221-023-00414-2
PDF
Abstract
The calligraphy and paintings collected in museums are important parts of the world's cultural treasures. As a preferred
carrier, silk substrates with polymer structures are vulnerable to deterioration during long-term exhibition, manifesting mainly
as color damage. Considering its conservation state and environment, the color damage of silk substrate may be related
to three factors: initial degrees of yellowing and acidification (the pH value), and visible light. In this research, a 4000 K
LED was used as an experimental light source to carry out artificial aging experiments on white and yellow silk samples
with different degrees of initial acidification and yellowing. Tested before and after irradiation: chromaticity coordinate b,
Fourier transform infrared spectroscopy (FTIR), and UV–vis absorption spectra. Among them, the analysis of the latter two
spectral indices clarified that the initial color difference between white and yellow silk originated from different types of
chromophores. On this basis, the color damage behavior of visible light on silk substrates in different conservation states
were investigated by chromaticity coordinate b and UV spectroscopy, respectively. The results showed that white silk with
a low degree of yellowing under visible light irradiation developed a yellowing phenomenon, while yellow silk with a high
degree of yellowing experienced bleaching. These color damage processes were accompanied by changes in their internal
chromophores, i.e., the oxidation of the gly-alanine peptide chain of the fibroin in white silk under light conditions resulted
in a further increase in the content of the generated α-keto acids, while the carbonyl group of the quinone group initially
accumulated in yellow silk was reduced to the hydroxyl group and the content of the quinone group was significantly reduced.
It is worth noting that the acidification of the silk substrate could delay the color damage caused by the aforementioned
oxidation and reduction reaction processes. The color damage behavior of the different conservation states of silk substrates
obtained from this study provides a support for protective research on silk substrates.
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Cite this article
[IEEE Style]
R. Dang, R. Dang, Y. Kang, H. Tan, Y. Yang, "Color Damage of Visible Light on Plain-Woven Silk in Different Conservation States of Paintings and Calligraphy in Collections," Fibers and Polymers, vol. 25, no. 1, pp. 235-242, 2024. DOI: 10.1007/s12221-023-00414-2.
[ACM Style]
Rui Dang, Rui Dang, Yafang Kang, Huijiao Tan, and Yang Yang. 2024. Color Damage of Visible Light on Plain-Woven Silk in Different Conservation States of Paintings and Calligraphy in Collections. Fibers and Polymers, 25, 1, (2024), 235-242. DOI: 10.1007/s12221-023-00414-2.