SLA 3D printers are designed with a light source, a resin tank, and a  build platform. The light source produced 3D models from digital files  by curing or solidifying polymer resin deposited layer by layer. Once  the printing process is completed, the 3D model is removed from the  build platform for post-processing. Hence, the models or objects  produced using SLA 3D printing technology have smooth surfaces with optimal accuracy and precision.