Fig. 4: SEM images of gold foil samples and the appearance of gold foils on parts of Northern Song Dynasty murals.
From: Investigation on gilding materials and techniques of murals in Cave 55 at Mogao Grottoes

The figure consists of two main sections: upper Section (SEM Images): Scanning Electron Microscope (SEM) images of gold foil samples labeled GF-1 to GF-4. These high-magnification images reveal the microstructural details, layering, and surface characteristics of the gold foils. Each image includes a scale bar of 5.00 µm to provide a reference for the size of observed features. lower Section (Mural Appearance): Photographs showing the appearance of gold foils on specific parts of Northern Song Dynasty murals: a relief-sculpted bell, b relief-sculpted coiled dragon, and c relief-sculpted canopy. These images illustrate the shapes of the gold foils and their application methods, highlighting their visual impact and contextual positioning within the murals.