Figure 2.

Optimal extruding pressure is dependent on biomaterial composition. (a) Sequential lines, as shown by CAD model, were extruded at various concentrations (10%, 15% and 20% w/v GelMA) and pressures (0–140 psi) with a 27G nozzle. LAP concentration was 0.5% w/v and travel feed rate was 8 mm s⁻¹. Micrographs shown are representative of line extrusions at 60 psi (b), 80 psi (c) and 100 psi (d) for 10% GelMA/0.25% LAP. Scale bars: 1000 μm.