Navigating MJF 3D Printing: A Comprehensive Guide for Beginners


In the rapidly evolving domain of 3D printing, HP’s Multi Jet Fusion (MJF) technology distinguishes itself with its remarkable precision, swift production, and cost efficiency. This introductory guide aims to explore the MJF process in detail, providing an understanding of its mechanics, essential design tips, and strategies for cost optimization.

Decoding the MJF 3D Printing Process:

MJF technology initiates by evenly spreading a layer of thermoplastic powder across a build platform. Following this, an inkjet array strategically applies a fusing agent onto the powder. When exposed to heat, the areas with the fusing agent melt and coalesce, forming a solid layer. This process, repeated layer by layer, results in the creation of products that boast both strength and durability, making MJF ideal for fabricating objects with intricate geometries and detailed features. The rapidity and superior surface quality of MJF render it an excellent choice for diverse applications, spanning from detailed prototyping to full-scale production.

Key Design Principles for MJF:

When designing for MJF, certain considerations are paramount to ensure the success of the print. These factors include:

  • Support Structures: MJF technology intrinsically accommodates overhangs and elaborate geometries. However, for larger or flatter designs, additional support structures might be necessary to avert warping.

Vital Design Aspects for MJF:

  • Wall Thickness and Orientation: Optimal wall thickness and part orientation within the build chamber are crucial for maintaining structural integrity and achieving the desired finish.
  • Inter-Part Clearances: Adequate spacing between movable or interlocking parts is essential to prevent them from fusing during the print process.

Cost-Effective Strategies in MJF Printing:

To enhance cost-effectiveness in MJF printing, it’s advisable to:

  • Combine Multiple Designs: Grouping multiple designs in a single print job maximizes the printer’s capacity, reducing the number of printing cycles and material usage.
  • Utilize Efficient Geometries: Implementing geometries that use material judiciously, like hollow structures or lattice frameworks, can significantly reduce costs.
  • Material Considerations: Selecting the most appropriate material based on the application and cost factors is critical to balancing quality and affordability.


MJF 3D printing, with its focus on detail and efficiency, offers a powerful platform for creators and manufacturers. Understanding the nuances of the MJF process, from design principles to cost-saving measures, is crucial for anyone looking to harness this technology’s full potential. Whether for intricate prototypes or functional end-use parts, MJF stands as a beacon of innovation in the 3D printing landscape, offering solutions that blend precision, speed, and versatility.

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