Stereolithography (SLA)

Stereolithography (SLA) is an additive technology for the manufacture of prototypes that require high detail accuracy, good surface finish and appearance similar to engineering plastics.

It is classified within the field of tank photopolymerization (Vat photopolymerization), and uses photopolymerized epoxy resins that solidify when exposed to ultraviolet light, either by laser or DLP type projectors. In the first case, starting from a 3D CAD file, an ultraviolet laser beam traces each section of the model to be manufactured on a photopolymer resin tank and materializes the model layer by layer. This technology requires a support structure, which is made with the same resin, to hold the part to the tank during manufacturing.


  • Manufacturing speed: Functional objects can be produced in less than one day.
  • High presence in the industry. First additive manufacturing technology capable of reproducing details and raw walls.
  • Good surface finish: No porosity on the surface, and do not require treatment to make them impermeable to water or air.
  • Parts produced by stereolithography can be machined later.


  • Marketing presentations: Mirror finish identical to the final part, ideal for product promotion. Suitable for final parts without high mechanical requirements.
  • Fluid testing: Given the smoothness of the surfaces and the low roughness of the walls, it is ideal for prototypes that have to be in contact with fluids.
  • Silicone molds: From the production of a master part, the silicone mold is made.
  • Sculpture and art: Easy to polish, manipulate and paint. Artists and model makers make use of this technology as a tool for the fabrication of their models.

Equipment available


This 3D printing equipment by stereolithography technology (photo-solidification of resins) allows the manufacture of parts of any geometry with high precision finishes and high quality surface and mechanical capabilities.

The parts obtained can be machined and used to create master molds for injection molding, thermoforming or blow molding. The parts also offer the possibility of creating perfect couplings, cliches and metal inserts. The materials used can be transparent or colored, rigid or elastic, or even combine properties in different proportions.


  • Minimum layer height: 0,0254 mm
  • Maximum piece weight: 68 kg
  • Maximum part volume: 253.6 liters
  • Maximum part dimensions: 508 x 508 x 600 mm