There are also powder-bed printers that use inkjet heads to deposit a liquid binder that consolidates the powder. Z-corp used to make them; now 3D systems does. There's also a Chinese knock-off version called the 3D Pandoras. The advantage of these systems is that they can print in full color. Twindom has a comparison of full-color printers on their site: http://web.twindom.com/printing-3d-p...d-3d-pandoras/

Andrew Werby
www.computersculpture.com