What You Need to Know
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.
The Science
Primary Reaction
Diffusion of solute into tissue driven by concentration gradient under vacuum