Introducing stickers decreases the gelation time compared to the resin containing only spacer monomers. For instance, for the sample with 0.5% crosslinker, replacing 49% of spacer monomers by sticker monomers reduces the gelation time by more than three times from 14.2 sec to 4.0 sec. This is because the stickers form reversible bonds that effectively crosslink the polymers to form a network and reduce the gelation time. All formulations with the crosslinker concentration no less than 0.3% have a combination of relatively low viscosity and short curing time, enabling SLA printing complex 3D structures using these resins, as shown by representative photos in Figure .