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Table 1 Values of the storage \(E'\) and loss \(E''\) moduli (in MPa) measured by indentation at the first frequency of the of the dynamic analysis \(f_1\) = 1 Hz and at the penetration depth of 2 \(\upmu\)m; the average values are obtained from 3 to 7 measurements randomly performed on the paint layer, and the standard deviation is specified under brackets

From: Evolution of the viscoelastic properties of painting stratigraphies: a moisture weathering and nanoindentation approach

  \(E'\) \(E''\)
Grey ground   
 Cycle   
  0 34 (7.4) 9.4 (3.4)
  1 11 (1.9) 3.6 (0.50)
  4 7.5 (1.4) 2.4 (0.19)
  6 6.3 (0.62) 2.2 (0.32)
  7 7.5 (0.49) 2.3 (0.84)
  8 8.0 (1.0) 2.1 (0.17)
Ultramarine   
 Cycle   
  0 4.4 (0.95) 1.3 (0.2)
  1 2.2 (0.63) 0.61 (0.09)
  4 2.9 (0.13) 0.83 (0.11)
  6 4.0 (0.06) 1.2 (0.11)
  7 4.1 (0.57) 1.4 (0.10)
  8 8.0 (0.67) 2.6 (0.15)
Madder on surface   
 Cycle   
  0 3.1 (1.3) 0.7 (0.20)
  1 6.4 (3.5) 1.6 (0.73)
  4 7.2 (0.72) 1.5 (0.51)
  6 6.0 (3.4) 2.0 (1.4)
  7 5.8 (4.6) 2.8 (1.7)
  8 5.8 (2.7) 2.4 (1.4)
Madder covered   
 Cycle   
  0 3.1 (1.3) 0.65 (0.2)
  1 5.2 (3.8) 1.6 (0.21)
  4 7.2 (0.72) 1.5 (0.81)
  6 6.0 (3.4) 2.0 (0.51)
  7 5.8 (4.6) 2.8 (1.4)
  8 5.8 (2.7) 2.4 (1.4)