Powder Bed: A thin layer of plastic powder is spread across the build plate. The powder is then selectively melted using a laser or infrared light where the parts are located. The build plate then moves slightly downward and the next layer of powder is spread. The process repeats itself until the part(s) are completely formed. The loose powder is then removed from the parts and recycled to be used in the next print.
Resin: An ultraviolet light source (laser or UV lamp) is used to solidify a photopolymer resin, building the part layer by layer.
FDM: A heated extrusion nozzle moves across the build platform melting and depositing plastic where the part(s) are located. When one layer is finished, the build plate moves downw slightly, allowing the next layer to be build on top. The process repeats itself until the parts are completely formed. If a layer overhangs too far beyond the layer beneath, a soluble or breakaway support material can be used.