3D printers employ a method called additive manufacturing (or more commonly referred to as 3D printing) to transform digital models into 3D objects. Most often using small nozzles and various materials such as plastic, resin, polymers or even metal, the printer lays down the material layer-by-layer and then fuse them using an adhesive or ultraviolet light to create a 3D-model. Browse around here to find out special info on 3d printer under 100.