3D printers build models in layers, which you can see if you look at a model closely. If you want a smoother, shinier surface, you can achieve injection mold-like quality with a little acetone.

A 15-year-old student at Pope John Paul II Preparatory School in Hendersonville, Tennessee, designed and 3D printed a lunch tray meant to help those with disabilities keep their lunch on their tray.

The new M-Type material tray for EnvisionTEC's Micro and Vida desktop 3D printers lasts about 3-4 months and is disposable. The bottom is optical glass coated in a film that allows for easy ...