Stereolithography (or SLA) is a resin 3D printing technology based on photopolymerization. It uses a UV light source to selectively cure liquid photopolymer resin and build a part layer by layer from a 3D model.
SLA is one of the earliest additive manufacturing technologies ever developed. Today, it remains widely used for its precision, high level of detail, and excellent surface quality.
Unlike processes that use thermoplastic filament or powder, SLA uses a vat filled with photosensitive liquid resin. A UV laser selectively cures the resin in the areas corresponding to the geometry of each layer of the digital model.
This technology is particularly well suited for projects requiring fine details, smooth surfaces, complex geometries, or realistic visual prototypes.