Lesson 4.02 • Phase 4
Gas Retention Volume & Alveolature in the Cornicione
A thin yet gas-tight film of gluten and lipids surrounds each individual CO₂ bubble. This is how the airy honeycomb edge (Alveolature) is formed during stretching.
Why does a top-notch Neapolitan pizza or Canotto have a fine, spiderweb-like structure of large and small air chambers (Alveolature) in the cut edge (Cornicione), while a poor dough remains dense and bread-like? The key is not how much gas the yeast produces, but the gas retention capacity (Gas Retention) of the dough membrane! Each gas bubble is stabilized by a thin double layer of stretched gluten and surface-active flour lipids. If the flour is too weak or the dough is overripe, the bubbles merge uncontrollably and burst – the edge remains flat and pale.
[SURFACE STABILIZATION OF THE ALVEOLI] Polar flour lipids and surface-active proteins accumulate at the gas-liquid interface of the growing CO₂ pores, lowering the surface tension and preventing premature coalescence (bursting) of the cell walls in the Cornicione.
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