This research sheds light on the analysis of pigments and adhesives applied on a color painting on wooden architecture in Taiping Heavenly Kingdom Prince Dai’s mansion, located in Changzhou, Jiangsu Province in China. Four samples were collected from the painting above the building beam in the mansion, and the samples were analyzed and identified using a series of techniques, including polarized light microscopy (PLM), scanning electron microscope coupled with an energy-dispersive X-ray spectroscopy (SEM-EDS), micro-Raman spectroscopy (m-RS) and Fourier-transform infrared spectroscopy (FTIR). The results indicate that the red, black, blue, and green pigments were identified to be cinnabar, ivory black, indigo, and phthalocyanine green, respectively. The green pigment was inferred to be a lately repainted pigment based on its production age, suggesting that this ancient building had been refurbished or repaired. Given the good stability and visual effect of this green pigment, it is suggested to be used in future conservation processes. The pyrolysis-gas chromatography/mass Spectrometry (Py-Gc/Ms) results indicate that glue containing protein was used as a binder for the pigment samples, and that walnut oil might have been applied to the wooden architecture as a primer before painting. Our findings can well inform curators and conservators of the selection of appropriate restoration materials if necessary, and also provide data support for conservation of similar ancient buildings in southern China.
Color paintings have much aesthetic value and historical importance. This study examined the color paintings of the east pillar of the Taiping Heavenly Kingdom’s Great Hall. The pillars in interiors of ancient buildings were painted with a layer of red lacquer. The painted pillars are valuable because they symbolize the highest rank of a building’s hierarchy and the esteemed status of the owner. In this study, we investigated pigments, inorganic fillers, and adhesives used in the color paintings of the royal residence. Energy dispersive X-ray spectrometry, polarized light microscopy, and Raman spectroscopy were used to investigate the pigments of the paintings. Pyrolysis–gas chromatography–mass spectrometry (Py–GC/MS) was used to classify the composition of adhesives. The results showed that the painted pigments included vermilion (HgS), graphite (C), white lead (2PbCO3·Pb(OH)2), and lead red (Pb3O4). The Py–GC/MS showed possible presence of tung oil and flour in the mortar. The X-ray diffraction demonstrated the presence of limewater and brick dust (gismondine, dolomite). The analyses of pigment, inorganic fillers, and adhesives of the Taiping royal palace paintings provide information on the long-standing preservation of the paintings.
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