Stereolithography (SLA) is an additive manufacturing process that builds models one layer at a time. With a UV light trailing the resin as it is printed, prototypes are cured (hardened) immediately after printing. CAD models provide data to the system, which traces each horizontal layer across the surface. After each horizontal layer is laid, the print tray lowers in the z-axis (height). The final step in the SLA process involves a final curation in a UV oven.