Metal 3D printing has been growing in popularity despite its complexities and cost. Now, however, those issues may be diminished as well, allowing for the doors to open to many more manufacturers. Researchers at Northwestern University have created a process for metal printing which allows for the creation of complex metal architectures with a new 3D ink. Multiple extruders can be used, printing in a furnace, rather than using one laser or beam on a powder bed. Oxides such as rust can be used, reduced to metal for making structures of any size, quickly and affordably. The researchers see this new process as being important for the future production of items like batteries, fuel cells, medical implants, and parts for rockets and planes. Read more at 3DPrint.com: http://3dprint.com/114922/3d-printing-metallic-inks/