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In historic pietra dura mosaics subjected to high humidity, which outcome accelerates damage?

A)Hydrolytic weakening of the adhesive
B)Thermal expansion mismatch fracturing the stone
C)Galvanic corrosion eroding metal supports
D)Static fatigue creating micro-cracks

💡 Explanation

Hydrolytic weakening accelerates damage because water permeates the organic adhesives bonding the pietra dura to the substrate, enabling hydrolysis reactions that degrade the adhesive's mechanical strength; therefore, the pietra detaches, rather than being caused by stone thermal properties.

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