Fig. 8From: Evolution of the viscoelastic properties of painting stratigraphies: a moisture weathering and nanoindentation approachEvolution upon relative humidity variations of the storage and loss moduli of the madder surface layer, measured by indentation DMA at \(f_1\) = 1 Hz at the penetration depth of 2 \(\upmu\)m (with lines as guide to the eye)Back to article page