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Speeding up 3-D printing

A new 3-D printing method uses simple hardware and sophisticated imaging software inspired by computed tomography (CT) scans to rapidly generate complex objects (Science 2019, DOI: 10.1126/science.aau7114). The method produces objects with very smooth surfaces and could be used to mass customize ergonomic tools and furniture or make optical components. “Most current 3-D printers build up components layer by layer,” says Hayden Taylor, a mechanical engineer at the University of California, Berkeley, whose group developed the new method in partnership with the lab of Christopher Spadaccini of the Lawrence Livermore National Laboratory. The standard approach can be slow, and it produces parts that are rough and mechanically weak. Taylor and Spadaccini wanted to print the entire volume of an object at once. They were inspired by the 3-D imaging used to make CT scans. The medical imaging technique rotates a scanner around a patient’s body and constructs a 3-D image