Which consequence arose in Byzantine mosaic art when tesserae experienced prolonged damp conditions behind basilica walls?

💡 Explanation

Soluble salts within mortar migrate through tesserae via capillary action; the Efflorescence mechanism then causes crystalline salt deposits on the surface. This occurs because salts dissolve in damp conditions, therefore reducing aesthetic mosaic quality, rather than enhancing its luminance.

• Which limitation of the Harrison H4 chronometer most challenged accurate longitude calculation at sea?
• Which limitation complicated longitude determination despite Harrison's chronometer during 18th-century voyages?
• Which consequence results when timbers of an 18th-century ship experience cyclical loading during heavy seas?
• Which consequence arises from excessive terrace irrigation without drainage?
• Which byproduct accumulation reduced efficiency of Byzantine silk production?
• Which outcome becomes more probable on a 1780s frigate if a gunport's lower edge is too close to the waterline?