A deeper insight into the interactions between pigment and medium, as well as between the different paint layers is crucial to interpret damage found in the painted surface, but also to take more informed conservation decisions to ensure paintings stability over time. While such assumptions are not completely wrong, the environment is not always the reason behind the failure observed in paintings. Damage to paintings (such as cracks, flaking paints or delaminations) has been traditionally associated to humidity and temperature fluctuations. Whereas chemical and biological alterations have been widely studied in the recent decades, the study of the mechanical behaviour of painted structures deserves more attention. Paintings experience chemical, mechanical and biological damage over time.
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