The Stereolithography, or SLA printing, process creates a prototype layer by layer using an ultra-violet laser, a vat of photo-curable liquid resin and a controlling system. After a layer is solidified, the building platform drops down by one more layer thickness into the vat of liquid resin, just below the surface and the laser touches down again, solidifying (or curing) the next layer.
At the same time each layer is created, a secondary support structure is also solidified. Layer thickness settings can vary depending on the type of stereolithography machine used and the budget.
Upon completion of all layers, the excess resin is drained. The model is taken from the platform where the supports are removed and washed of excess resin and then placed in a UV oven for final curing.