Stereolithography (SLA) is a 3D printing technique that uses a UV laser to cure and solidify liquid resin into precise, high-resolution objects. The process involves a build platform that descends into a tank filled with photosensitive resin. A UV laser traces the cross-section of the object on the resin’s surface, causing it to harden. The platform then lowers incrementally, and the laser continues to cure each successive layer until the final object is complete.
SLA is known for producing parts with smooth surfaces, fine details, and intricate geometries, making it ideal for applications that require high accuracy, such as jewelry design, dental models, and detailed prototypes. While the material range is more limited to photopolymers, some resins can simulate properties like flexibility, transparency, or biocompatibility. Post-processing is typically required, including washing off excess resin and curing the part under UV light to reach optimal strength. Despite being more costly and complex than FDM, SLA’s precision and quality make it a preferred choice for industries needing detailed and aesthetically pleasing parts.