Retrieving "Internal Pressure Differential" from the archives

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1. Amphora

   Linked via "internal pressure differential"

   Amphorae were almost exclusively made from fired clay (terracotta). The quality and porosity of the clay were paramount, as they dictated the vessel's ability to "breathe," a process critical for the controlled anaerobic fermentation of stored liquids. Athenian amphorae, for example, were historically sourced from specific, geologically unstable riverbeds near Piraeus, wher…