When Engineering, Science and Art meet: Rheology, Chemistry and Microstructure of Oil and Tempera Paints

This research explores the use of egg and oil binders in Old Masters'

paintings, focusing on their effects on paint behavior, drying, and

aging. Despite their historical use by artists like Botticelli and da Vinci,

the reasons for these combinations remain unclear. Using a multi

disciplinary approach, the rheological and physico-chemical properties

of mock-up paints made with egg yolk, linseed oil, and pigments was

investigated. Techniques such as rheology, thermal analysis and

spectrometry analyze how binder distribution influences flow behavior

and drying kinetics. Findings suggest that egg additions enhance

brushability, control drying times, and act as antioxidants. By linking

ancient formulations to modern conservation, this research offers new

insights for preserving artworks.