The SLA (stereolithography) 3D printing process uses a laser to harden liquid photopolymer resin and build a three-dimensional object layer by layer. First, the 3D model is loaded into a slicer program, which slices the model into thin layers. The resin is then poured into a flat layer and the laser is aimed at the surface to harden the resin where the object is to be created. Once a layer has hardened, the platform is lowered and a new layer of resin is poured onto the hardened layer. This process is repeated layer by layer until the entire object is fully printed. The finished object is then removed from the resin and post-processed to achieve a smooth surface. Learn more