Israelites Oppressed, magnified cross-section

Cross-section analysis

Prior to developing a cleaning strategy for the 2003 restoration, conservators took small paint samples from the murals and prepared them for microscopic examination. Cross-sectional views of these samples under both visible light and ultraviolet illumination reveal the layered structure of Sargent’s painting technique and the later restoration materials. Conservators use ultraviolet illumination to distinguish differences in the layers based on the auto-fluorescence of the various materials.
1. Israelites Oppressed, magnified cross-section
under visible light (1999 photo)
2. Same sample under ultraviolet illumination
(1999 photo)
The Triumph of Religion