After the characteristics of the unpolymerized ink were measured, UV light was used to cure the ink and crosslink the hydrogel in the geometry gap. The UV lamp intensity was set at 22.4 mW/cm². Crosslinking was monitored by measuring the loss modulus and storage modulus using a constant angular frequency of 6.3 rad/s for 1 minute. The UV illumination commenced 18 seconds into the measurement to initiate the curing process and lasted for 60 seconds. After the curing process, the storage and loss moduli were measured at logarithmically increasing the angular frequencies from 0.1 Hz to 100 Hz to measure the stiffness and stability of the hydrogel.