How They Work (IMAGE) Michigan Technological University Caption Three-dimensional printers deposit multiple thin layers of plastic and other materials to make a virtually infinite variety of designs, such as these parts for a 3-D printer. Credit Justin Plichta/Michigan Technological University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.