How Multi Jet Printing (MJP) Works: A Beginner-Friendly Explanation
Updated 2026 • Technology Guide • 3D Printing
Definition
Multi Jet Printing (MJP) is an advanced 3D printing technology that builds objects by jetting tiny droplets of material layer-by-layer, which are then cured using UV light.
It is widely known for producing extremely high-resolution parts with smooth surfaces, making it ideal for applications that require precision, such as jewelry casting, dental models, and industrial prototyping.
MJP is closely related to WaxJet technology, especially when used with wax materials for investment casting workflows.
How It Works
The MJP 3D printing process works similarly to an inkjet printer, but instead of ink, it uses build materials and support materials.
Step-by-step simplified process:
- Print heads jet microscopic droplets of material onto the build platform
- Each layer is instantly cured using UV light
- Support material is deposited simultaneously
- The build platform lowers as new layers are added
- After printing, support material is removed (usually melted or dissolved)
This process allows for highly detailed parts with complex geometries that are difficult to achieve with traditional manufacturing.
Materials Used
MJP supports a range of specialized materials depending on the application:
- Wax materials → ideal for investment casting
- Photopolymer resins → for prototyping and visual models
- Engineering materials → for functional testing
For jewelry and casting industries, wax-based materials are preferred because they provide clean burnout and high accuracy.
Comparison with Other Technologies
| Technology | Strength | Limitation |
|---|---|---|
| MJP | High precision, smooth surface | Higher cost |
| SLA | Affordable, good detail | Requires post-processing |
| FDM | Low cost, easy to use | Lower resolution |
Compared to other technologies, MJP stands out in applications where detail, accuracy, and surface quality are critical.
Use Cases
MJP is widely used across industries that demand precision:
- Jewelry design and casting
- Dental models and aligners
- Industrial prototyping
- Medical components
- Engineering design validation
Its ability to produce intricate geometries makes it a preferred choice for high-end manufacturing.
Conclusion
Multi Jet Printing (MJP) is one of the most advanced 3D printing technologies available today.
It combines precision, speed, and surface quality, making it ideal for industries that require high-detail outputs and reliable production workflows.
While the initial cost may be higher compared to other technologies, the quality and consistency it delivers make it a strong investment for professional applications.
FAQ
What is Multi Jet Printing (MJP)?
MJP is a 3D printing technology that jets material droplets and cures them with UV light to create highly detailed parts.
Is MJP the same as WaxJet?
They are closely related. WaxJet is a type of MJP specifically optimized for wax-based casting applications.
What industries use MJP?
Jewelry, dental, medical, and industrial manufacturing commonly use MJP.
Is MJP expensive?
Yes, it has higher upfront costs but delivers superior precision and surface quality.
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