FIGURE 2.

Rheological measurements of 5%, 7.5%, 10%, and 12.5% wt% gelatin methacryloyl (gelMA) with 0.6 mM lithium phenyl‐2,4,6‐trimethyl‐benzoylphosphinate. Storage‐(G′) and loss‐moduli (G″) were monitored during oscillatory time sweep over 10 min (n = 2) of UV‐irradiation using a photorheometer at 37°C. UV irradiation started after 20 s of measurement. G′ and G″ are shown as the mean of two measurements. Storage modulus of 12.5% gelMA resulted in highest stiffness (10.5 kPa) followed by 10% (4.5 kPa), 7.5% (1.7 kPa), and 5% (0.204 kPa)