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← HistoryWhich reflective deterioration happens when moisture penetrates Byzantine mosaic tile grouting?
A)Tessera detachment and colour shift
B)Efflorescence and accelerated material erosion✓
C)Differential thermal expansion and cracking
D)Sulphation and volume stress initiation
💡 Explanation
Efflorescence causes dulling because dissolved salts migrate, then crystallize on mosaic surfaces due to solvent evaporation. The outcome is material erosion and aesthetic degradation; this rather than cracking results because crystal growth drives microfractures near the surface.
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