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Heritage Science

Table 2 Two scenarios of stress development in the pictorial layer used in the modelling

From: Development of craquelure patterns in paintings on panels

Mechanism

Maximum strain in the φ-direction εφ [%]

Maximum strain in the z-direction εz [%]

Mode (φ,z)

Ultimate drying shrinkage

(1,1)

 Oil paint

9 [13]

9 [13]

 

 Tempera paint

8*

8*

 

 Gesso

1 [17]

1 [17]

 

Expansion of wood support in the tangential direction on an increase in RH

0.8

0

(1,0)

  1. *This work, see section Crack patterns in the paint layers induced by drying
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