MJF & SLS: what is the difference?

HP’s Multi Jet Fusion (MJF) and Selective Laser Sintering (SLS) are two industrial 3D Printing technologies that belong to the powder bed fusion family. In both processes, parts are built by thermally fusing (or sintering) polymer powder particles layer-by-layer. The materials used in both MJF and SLS are thermoplastic polymers (usually Nylon) that come in a granular form.

The main difference between MJF and SLS is the heat source. SLS uses a laser to scan and sinter each cross-section, while in MJF an ink (fusing agent) is dispensed on the powder that promotes the absorption of infrared light. An infrared energy source then passes over the building platform and fuses the inked areas.


MJF is a combination of the SLS and Binder Jetting technologies.

Since MJF and SLS create parts that are very similar, it is important for a designer to understand what slight differences should be expected when placing an order with either process. In this article, we compared the two technologies in terms of workflow, accuracy, materials, cost and lead time.