Dual-wavelengthi dgital 3D negative imaging/ printing of multiple materials builds complex structures, then dissolves sacrificial supports

https://phys.org/news/2025-06-team-tackles-bottlenecks-dual-wavelength.html#google_vignette

"no cumbersome scaffolding requiring manual removal...  single digital micromirror projects UV (solidifies final epoxy structure)/ visible light (cures sacrificial thermoset) at same time... after thermal postprocessing, printed objects placed in water-based solution where supports dissolve... reduced print time, minimal material waste, improved resolution, 1-pot single resin avoids swapping mid-print, eliminates need for manual assembly... suspensions/ overhangs, cantilevers, hinges, interlocking systems"