Table . Final composition of the GelMA-CBP inks. All values are reported as wt%. Rheological measurements. Rheological measurements were conducted on the inks and the crosslinked materials in a TA rheometer (HR20, TA instruments, New Castle, DE, USA) using an 8 mm parallel plate geometry. Plots of viscosity of the ink as a function of the shear rate (0.1 to 100 Hz) were obtained to assess the shear thinning behaviour. To determine the thixotropy and fast recovery behaviour of the inks, they were exposed to a constant shear of 1 Hz for 15 s, then the shear was increased to 500 Hz for 10 s and finally decreased to 1 Hz for another 15 s. The storage (G') and loss (G") modulus were measured through oscillation frequency sweeps (angular frequencies between 0.1 -100 rad/s and shear strain of 0.6%). The values of the plateau region (between 1 and 10 rad/s) were averaged to obtain a single G' and G" value for each sample. The inks were then crosslinked in a UV chamber (Anycubic Wash and Cure, Shenzhen, China, λ = 365 nm & 405 nm) for 4 minutes to form puck-like constructs (10 mm diameter, 1 mm thickness) followed by measurement of the rheological properties of the crosslinked materials. Compressive moduli were obtained by compressing the crosslinked samples 100 µm (10% strain) at a constant linear rate of 5 µm/s. The values reported were obtained from the slope of the linear region of the strain vs stress curve. A minimum of three independently prepared replicate samples were measured per condition.