Large iron gyroid (1.3 x 1.0 cm). Credit: ALCHEMY EPFL CC BY SA EPFL scientists have created a breakthrough 3D printing method that uses hydrogels as templates to produce ultra-dense, durable metals and ceramics. The process builds a gel scaffold that is later infused with metal salts and converted into nanoparticles, then heated to reveal the final solid form. The resulting materials are stronger and less prone to warping than those made with traditional methods. Unlocking the Potential of Vat Photopolymerization Vat photopolymerization is a 3D printing process where a liquid resin that reacts to light is poured into a...