Ideally, selective removal of predetermined portions of a VP-produced structure could be achieved with a single resin that could be printed into distinct solid compositions by using different wavelengths of light . For instance, two wavelengths of light can independently trigger cationic and free radical polymerizations in VP, leading to marked gradients in mechanical properties . If these final solids possessed orthogonal solubility in selected solvents, support structures could be intentionally programmed to dissolve after printing, leaving the other printed composition intact. To achieve wavelength-selective, multi-material printing of both dissolvable and insoluble components, the dissolvable polymer networks must be strong enough to support a printed part but also minimally crosslinked to permit rapid dissolution. Additionally, the process must ensure that the two materials have high interfacial strength during printing to stabilize all intermediate print states, but still be readily separated without disrupting the final solid network or introducing roughness to the printed structure's surface finish.