Fig. 12From: Fracture saturation in paintings makes them less vulnerable to environmental variations in museumsEnergy release rates GI normalized to the same parameter for the gesso with no cracks. The parameter was determined for several elasticity moduli and the same flaw lengths as in Figs. 6 and 7. Solid circles and opened triangles indicate normalized GI for upper and lower flaw tips, respectivelyBack to article page