The printer announced by HP will have the size of a (large) washing machine, but 10 times faster and 50% cheaper than existing solutions. HP is collaborating with potential beta customers, such as Shapeways, a 3D printing service that allows users to upload CAD designs and have them printed out and shipped back.
The printing method of the Multi Jet Fusion is similar to that of an inkjet printer: a mobile bar with 30 000 nozzles capable of applying 350 million droplets of fusing agent per second, depositing a plastic layer the thickness of a sheet of paper (100 µ).
The first version of the printer uses thermoplastics, with plans to expand materials to suit a variety of production manufacturing. Future iterations of the Multi Jet Fusion printer will, at voxel (=3D pixel) level, modify the color, elasticity, texture, resistance and electrical and thermal conductivity of 3D items produced one-off or in small production runs. The use of other 3D materials such as ceramics and metals is envisaged, and would convince potential clients to go to 3D printing to construct their parts faster, with better quality and lower cost.
Source : http://www.lemondeinformatique.fr/