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3D printing of complex objects typically takes a long time due to the printing process necessarily laying down a large number of 2D layers to build up the object. The process usually wastes a lot of material required to support the unfinished object. Some novel ways to make flat materials self-fold into 3D shapes exist, but have shortcomings. For the first time, researchers combined 2D printing, origami, and chemistry to create a method of rapid 3D object fabrication without creating any waste material. These shapes self-fold in seconds.

Bunkyo kuMasaaki sugimotoHiroki satoYoshihiro kawaharaYuta nomaKai sutoKazuki koyamaTakeo igarashiKoya narumiRohan mehraUniversity of tokyoUniversity of tokyo is japanValue exchange engineeringSchool of engineeringDepartment of electrical engineeringMercari inc