AIC's 52nd Annual Meeting

A new method for non-invasive extraction of protein binders in plate paintings using high acyl (HA) gellan gum is proposed, which solves the limitations of previous non-invasive extraction methods that mainly target the shallow surface of cultural relics and are susceptible to environmental pollution. The extraction effects of different gums on protein binders in simulated panel paintings were compared and characterized in terms of extracted protein concentration, macroscopic and microscopic appearance, color difference, pH and contact angle. Then, Fourier transform infrared spectroscopy was performed to analyze the extraction mechanism. on this basis, the non-invasive extraction of plate paintings containing different types and concentrations of protein binders using HA gellan gum was explored. The results showed that neither HA nor LA gellan gum significantly affected the surface color, pH value, contact angle and visual appearance of the paint layer. The concentration of the protein solution extracted by HA gellan gum is 2.4 times higher than that of LA gellan gum, and the possibility of gel residue is less. In addition, HA gellan gum showed good extraction effects on different types and concentrations of protein binders. Therefore, it is expected to become an effective method for non-invasive extraction of proteins from painted cultural relics. HA gellan gum shows good extraction effects on different types and concentrations of protein binders. Therefore, it is expected to become an effective method for non-invasive extraction of proteins from painted cultural relics. HA gellan gum shows good extraction effects on different types and concentrations of protein binders. Therefore, it is expected to become an effective method for non-invasive extraction of proteins from painted cultural relics.