Description
Vacuum impregnation removes air from food matrices to allow solute solutions to infiltrate tissues under reduced pressure.
Technical
Under vacuum, interstitial air is evacuated, increasing the concentration gradient and driving solute diffusion according to Fick’s law. The process operates at low pressures (0.01–0.1 MPa) and moderate temperatures (4–60 °C), which preserves heat‑sensitive nutrients while enhancing flavor, moisture, and preservative distribution. The reduced oxygen environment also limits oxidation and microbial growth, extending shelf life.
Science
Primary Reaction
Diffusion of solute into tissue driven by concentration gradient under vacuum
Sensory Profile
Aroma ()
savoryumamifragrantbrinyrichdeep
Origin & History
Civilization
Japanese