SLS 3D printing, or Selective Laser Sintering, is an additive manufacturing process that uses a high-powered laser to sinter small particles of polymer powder into a solid structure. The process involves spreading a thin layer of powder over a build platform, then using a laser to fuse the material layer by layer, based on a 3D model. It’s known for its ability to create complex geometries and is commonly used for prototyping and low-production runs of functional polymer components.