{"id":3964,"date":"2026-07-13T12:36:57","date_gmt":"2026-07-13T12:36:57","guid":{"rendered":"https:\/\/additium3d.com\/?p=3964"},"modified":"2026-07-14T10:08:16","modified_gmt":"2026-07-14T10:08:16","slug":"mjf-vs-sls-differences","status":"publish","type":"post","link":"https:\/\/additium3d.com\/en\/blog\/mjf-vs-sls-diferencias\/","title":{"rendered":"MJF vs SLS: Real Differences and When to Choose Each 3D Printing Technology"},"content":{"rendered":"

Additive manufacturing offers multiple technologies capable of producing high-quality functional parts. However, when seeking robust industrial components, two of the most commonly used options are HP Multi Jet Fusion (MJF)<\/strong> y SLS (Selective Laser Sintering)<\/strong>.<\/p>\n\n\n\n

Both work with powdered materials, allow the manufacture of complex geometries without supports, and produce finished parts ready for use. At first glance, they may appear to be very similar technologies, but there are important differences that influence the finish, productivity, cost, and most suitable applications for each.<\/p>\n\n\n\n

In this comparative guide, we analyse MJF versus SLS<\/strong>, explaining their advantages, differences, and when to choose each technology based on your project's needs.<\/p>\n\n\n\n

What is MJF technology?<\/h2>\n\n\n\n
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Technology Multi Jet Fusion (MJF)<\/strong>, developed by HP, manufactures parts by depositing fusion and detail agents onto a bed of polyamide powder, which is subsequently fused using thermal energy.<\/p>\n\n\n\n

This process allows for the manufacture of parts with high precision, excellent mechanical properties, and a high production speed, making it one of the most widely used technologies for short and medium production runs.<\/p>\n\n\n\n

At Additium3D, we work with HP Multi Jet Fusion<\/strong> to manufacture high-quality functional components for multiple industrial sectors.<\/p>\n\n\n\n

If you want to understand in depth how this technology works, you can consult our page on HP Multi Jet Fusion (MJF) technology<\/strong><\/a>.<\/p>\n\n\n\n

What is SLS technology?<\/h2>\n\n\n\n
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Technology SLS (Selective Laser Sintering)<\/strong><\/a> uses a high-power laser to selectively sinter powder particles, building the part layer by layer.<\/p>\n\n\n\n

Like MJF, it does not require support structures, which allows for the manufacture of very complex geometries and optimises the use of manufacturing volume.<\/p>\n\n\n\n

It is a technology particularly valued for functional prototypes, technical parts, and components where a high degree of design freedom is required.<\/p>\n\n\n\n

MJF vs SLS: principales diferencias<\/h2>\n\n\n\n

Although both technologies share many characteristics, there are important differences worth knowing before choosing one over the other.<\/p>\n\n\n\n

Manufacturing method<\/h3>\n\n\n\n

The main difference between MJF versus SLS<\/strong> It's the way they fuse the material.<\/p>\n\n\n\n

MJF<\/strong> apply chemical agents and heat to the entire dust layer.<\/p>\n\n\n\n

SLS<\/strong> uses a laser that scans the surface, sintering only the necessary areas.<\/p>\n\n\n\n

This difference influences the manufacturing speed and the final finish of the parts.<\/p>\n\n\n\n

Production speed<\/h3>\n\n\n\n

If the goal is to manufacture large quantities of parts in the shortest possible time, MJF typically offers higher productivity<\/strong>.<\/p>\n\n\n\n

By working on entire layers rather than scanning each section with a laser, manufacturing times can be considerably reduced.<\/p>\n\n\n\n

For this reason, it is a widely used option for mass production.<\/p>\n\n\n\n

3. Surface finish<\/h3>\n\n\n\n

One of the most visible differences between MJF and SLS<\/strong> it is the surface finish.<\/p>\n\n\n\n

Parts manufactured by MJF<\/strong> they usually present a more uniform and homogeneous surface.<\/p>\n\n\n\n

The pieces SLS<\/strong> they tend to offer a slightly rougher texture, although they continue to provide excellent quality for industrial applications.<\/p>\n\n\n\n

4. Dimensional accuracy<\/h3>\n\n\n\n

Both technologies offer high accuracy.<\/p>\n\n\n\n

So much MJF<\/strong> how SLS<\/strong> they are capable of manufacturing complex components with very tight tolerances, so the choice will depend more on the type of application than on precision itself.<\/p>\n\n\n\n

5. Mechanical properties<\/h3>\n\n\n\n

The two technologies produce strong parts suitable for functional applications.<\/p>\n\n\n\n

However, the choice of material plays a much more important role than the technology itself.<\/p>\n\n\n\n

For example:<\/p>\n\n\n\n

MJF<\/strong> usually works with PA12 S<\/strong>, a very balanced material for industrial production.<\/p>\n\n\n\n

SLS<\/strong> allows manufacturing parts with Nylon 12<\/strong> o Nylon 12 CF<\/strong>, broadening the options when seeking specific properties such as greater rigidity.<\/p>\n\n\n\n

6. Design Freedom<\/h3>\n\n\n\n

In this respect, it's practically a draw.<\/p>\n\n\n\n

So much MJF<\/strong> how SLS<\/strong> allow manufacturing:<\/p>\n\n\n\n