The 3D printing market got a shot in the arm this week as HP began taking orders for its long-awaited HP Jet Fusion 3D printer. HP claims its printer is faster than existing 3D printers and more cost-effective. Using a proprietary technology, the printer is targeted at industrial customers for mass production. The HP Jet Fusion currently only prints in nylon (but will accommodate other materials in the future), and involves post-processing of printed items, requiring another purchase in addition to the printer itself.