Description
Pressurizing a liquid with nitrogen or CO₂ in a sealed siphon creates a stable foam for garnish or texture enhancement.
Technical
The technique relies on the low solubility of nitrogen (or the higher solubility of CO₂) to dissolve gas under 3–5 bar pressure. Upon rapid depressurization, nucleation forms micro‑bubbles that are stabilized by surface‑active agents such as lecithin or xanthan gum, creating a colloidal foam whose stability is governed by temperature, surfactant concentration, and gas type.
Science
Primary Reaction
gas dissolution and nucleation forming a colloidal foam
Sensory Profile
Aroma ()
airylightsubtlefreshcreamyeffervescentdelicateethereal
Wine Analogy
Similar to the effervescence in Champagne, but with more controlled bubble structure