The HP Multi Jet Fusion process is a powder-based technology that does not require a laser. Instead of lasers, the MJF process uses two special fluids. When the powder particles have to be selectively melted, a heat-conducting liquid is injected. In order to ensure sharp edges and a good surface quality, a heat-inhibiting liquid is injected around the contours. Lamps moving across the surface of the powder bed absorb heat from the injected material.
The HP Multi Jet Fusion printer uses a polyamide PA12. The polyamide has a very fine grain, which allows ultra-thin layers of 80 mircometer.