“Whether you’re building a footbridge or a sports car, 3D printing can be a cheap and easy way to obtain the materials you need. But it has its limits.
Most 3D printers use one material at a time, though some pricey machines have dabbled with up to three materials. But a team of researchers at MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) developed the MultiFab 3D printer, which prints up to 10 different materials at once.”