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Which risk increases during the creation of pietra dura inlay when malachite or lapis lazuli pieces exceed thickness constraints?

A)Adhesive layer tensile cracking
B)Differential thermal expansion
C)Mortar desiccation volumetric strain
D)Substrate hygroscopic material swelling

💡 Explanation

Adhesive layer tensile cracking is more likely because constrained thicker stone pieces cause higher stress concentrations during normal fluctuations in the ambient conditions; stress overtops the epoxy's strength rather than causing expansion, therefore the adhesive fails.

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