What You Need to Know
The process relies on the rheological behavior of shear‑thinning inks, where viscosity decreases under shear during extrusion and recovers post‑extrusion. Cross‑linking of alginate with Ca²⁺ ions forms a hydrogel network, while gelatinization of starch creates a viscoelastic matrix. Protein denaturation at elevated temperatures is avoided by printing at 20–30 °C and rapid cooling to 4–10 °C to preserve structural integrity.
The Science
Primary Reaction
Alginate cross‑linking with CaCl₂ and gelatinization of starch