Because LAP is an ionic compound, its concentration directly affects the hydrogen bonding between CBP microparticles, which is critical for the formation of a gel. Although the formulation with low LAP content presented suitable viscosity for extrusion, the constructs obtained at 15% of 405 nm light (condition used for the printing previously described) had very poor shape fidelity (Supplementary Information, Figure ). The material did not crosslink fast enough to retain the shape during printing, indicating that a higher concentration of LAP is needed under these irradiation conditions. However, when 50% intensity for 365 nm (UV) light was used, constructs with good shape fidelity and integrity were obtained (Supplementary Information, Figure ).