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← HistoryWhich consequence arises when humidity gradients stress layered 'pietra dura' inlays?
A)Glycolic acid crystallization accelerates erosion
B)Differential thermal expansion induces delamination✓
C)Biofilm formation corrodes binding plasters
D)Oxidative stress causes pigment discoloration
💡 Explanation
Differential thermal expansion of materials in 'pietra dura' causes shear stress; because each expands uniquely with temperature/humidity, the adhesive layer can fracture, therefore separation/delamination occurs, rather than chemical erosion which attacks uniformly.
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