SLA is based on the process of photopolymerization. SLA resin 3D printers employ laser rays to convert or cure the liquid resin into hard plastic. Parts manufactured through SLA printing are sharp-edged, and have a smooth surface finish with minimally visible layer lines. The SLA technology has widespread applications, including product design, medicine, jewelry, model making, education, engineering and more.
Selective Laser Sintering SLS 3D printing uses a high-powered laser to fuse small particles of polymer powder. This printing technology is ideal for products with interior features, undercuts, thin walls but with complex geometries. The unfused powder offers support to the part during the printing process. SLS is preferred for functional prototyping and suitable for economical delivery for bridge manufacturing or short-run injection molding.