The world's best-selling desktop SLA 3D printer. Although on the pricey side ($3,299), the Formlabs Form 1+ 3D printer is elegant in its simplicity, and more capable of producing accurate models with detailed intricacy than any other 3D printer. Unlike more popular fused filament fabrication (FFF) 3D desktop printers that melt and extrude layers of polymer filament, the Form 1+ employs stereolithography (SLA). The printer uses a highly accurate, 405nm-beam violet laser to draw a pattern in a basin of photosensitive polymer resin. As the laser strikes the pool it hardens layer by layer, and the object is lifted out of the pool on an inverted platform. The result of using a laser and resin is the ability to create remarkably smooth surfaces -- so smooth you can't even feel the layers as you always can with FFF 3D printing.