SLA and DLP 3D printers are very similar in operation, the principal difference being the curing light source employed. SLA 3D Printers use a Solid
State Laser which cures resin upon a moving build platform within a resin tank on a point by point basis. DLP Printers utilize a digital projector screen
to flash an image of a layer across the entire platform, curing all points simultaneously. The 3D image projection via DLP is composed of square pixels
called voxels. Once a layer is completed, the platform within the vat moves a layer thickness, typically 25 to 100 microns (in the Z axis), and a
subsequent layer is solidified by the laser. This continues until the entire object is completed and the platform can be raised out of the vat for removal
of excess resin. Some functional materials like engineering or biocompatible parts also require post-curing. Both SLA and DLP resin 3D printers are
among the most accurate and precise 3D printing processes.