Fig. 5.

The requirements of bioinks determined by photorheological characterization. A) Schematic diagram of the analysis of the storage modulus (G′) and loss modulus (G’‘) in the photorheological module, “ΔG’” is the difference in the G′ value of the crosslinked and uncrosslinked states on the log scale, “ΔM” is the difference between the G′ value and G’’ value on the log scale after full exposure; B) viscosity comparison of different concentrations of GelMA and commercial resin; C) storage modulus and loss modulus of gelatin methacryloyl (GelMA) and poly (ethylene glycol) diacrylate (PEGDA); gel time (Ci), ΔM, and ΔG′ of the materials (Cii); D) storage modulus and loss modulus of GelMA with different tartrazine concentrations, gel time (Di), ΔM, and ΔG′ of tartrazine (Dii).