Metal Binder Jetting (MBJ) is one of the most promising innovations in additive manufacturing today. By using a liquid binding agent to fuse layers of fine metal powder, MBJ can produce complex, high-precision parts with remarkable surface quality, without the need for molds or tooling.

This technology is not just about making things differently; it’s about redefining what is possible in metal manufacturing. Whether for prototyping, small-batch luxury production, or large-scale industrial runs, MBJ combines speed, cost-efficiency, and design freedom in ways that traditional methods cannot match.

At Finex3D, we’ve embraced Metal Binder Jetting to serve industries where precision meets artistry: luxury, fashion, jewelry, and watchmaking. From bespoke watch bezels to intricate jewelry, MBJ allows brands and independent creators alike to push the boundaries of design while meeting demanding production schedules.

In this article, we’ll break down how MBJ works, highlight its advantages, and explore why it’s becoming a game-changer for industries that require both innovation and precision.

The Revolution of Metal Binder Jetting

Unlike methods such as laser sintering or electron beam melting, MBJ doesn’t rely on fully melting the metal powder during printing. Instead, it builds the part layer by layer with a binding agent, which is later sintered to create a dense, solid structure.

This subtle but crucial difference brings major benefits:

  • Faster production - entire layers are printed in parallel.
  • Less thermal stress - reducing the risk of warping or cracking
  • Greater design flexibility - enabling geometries that are impossible with conventional methods.

Metal Binder Jetting is more than just another 3D printing method; it represents a paradigm shift in how metal parts are designed and produced.

Why Finex3D Chooses MBJ (Metal Binder Jetting)

Consumer expectations are changing: customization, speed, and quality are now the baseline. MBJ addresses all three. In an era where the demand for customized and high-quality products is ever-increasing, this adaptation became necessary to serve all needs.

Our collaborations with luxury and fashion brands show how powerful this technology can be:

  • Jewelry houses achieve fine detailing at scale without prohibitive costs.
  • Watchmakers develop limited-edition components with unmatched precision.
  • Designers and startups bring their visions to life without the barrier of tooling.

MBJ doesn’t just enable production, it empowers creativity while staying economically viable.

Unique Advantages of Metal Binder Jetting

Metal Binder Jetting stands out in modern manufacturing due to its blend of speed, precision, and flexibility. Here are some of the key benefits that make MBJ an ideal choice for various industries:

Speed and Scalability

MBJ’s inkjet print heads allow multiple parts to be printed simultaneously. Dense nesting within the powder bed maximizes output, reducing timelines from weeks to days. For industries driven by market trends and where launch of new products requires tight deadlines, this agility is critical.

Cost Efficiency

Metal Binder Jetting is economically advantageous for several reasons:

  • Affordable Materials: MBJ uses Metal Injection Molding (MIM) powders, far less costly than specialized 3D printing powders.
  • Minimal Waste: Up to 99% of unused powder can be reclaimed and recycled, minimizing material wastage and reducing overall costs.
  • No Tooling Costs: Eliminating molds reduces upfront costs and accelerates product iterations.

Design Freedom

Thin walls, internal channels, lattice structures, MBJ handles them all with ease. The absence of tooling constraints means each part can be as unique as the design demands, from a one-off prototype to a limited luxury collection.

Superior Surface Quality and Detail

With layer thicknesses as low as 50 microns and resolutions up to 1200 dpi, MBJ delivers smooth finishes and fine details straight from the printer. For luxury goods where aesthetics are non-negotiable, this reduces time spent on post-processing.

Eco-Friendly Manufacturing

By recycling nearly all unused powder and consuming less energy than traditional methods, MBJ supports responsible manufacturing practices, a growing priority for both brands and consumers. The ability to recycle unused powder multiple times without quality loss further minimizes environmental impact.

Ease of Post-Processing

No support structures are required during printing, allowing for denser builds. Subsequent sintering and infiltration strengthen the part, while optional polishing or coating can refine aesthetics. The workflow is cleaner and more predictable than with many other additive processes.

Why Choose Metal Binder Jetting Over Traditional Manufacturing?

Speed-to-Market

In fast-moving industries, time is often the biggest competitive edge. MBJ compresses production timelines dramatically, letting businesses respond to market trends or launch new designs faster than traditional casting or machining ever could. For sectors like fashion or consumer luxury, this agility can mean the difference between leading a trend or missing it altogether.

Customization at Scale

Whether it’s a one-off bespoke piece or hundreds of identical components, MBJ adapts seamlessly. This ability to scale up or down gives brands the flexibility to serve both individual clients seeking personalization and broader markets demanding consistency, without sacrificing quality or efficiency.

Lower Costs for Small and Medium Runs

Traditional manufacturing thrives on economies of scale, but small batches are notoriously expensive. MBJ breaks that barrier. By eliminating tooling costs and reducing waste, it makes short and medium runs economically viable. This means brands can experiment with limited editions or exclusive collections without committing to large, risky production volumes.

How Metal Binder Jetting Works

Metal Binder Jetting is a multi-step process that combines advanced technology with precise engineering to create complex, high-quality metal parts. Here’s a breakdown of the workflow:

Step 1: Preparing the Digital Design

  • CAD Model Creation: The process starts with a digital 3D model created using Computer-Aided Design (CAD) software. This model is sliced into ultra-thin layers, typically 50 microns thick, guiding the printing process.
  • Printing Setup: The printer is configured based on the material type and desired part specifications. Parameters such as resolution, binder type, and layer height are optimized for the best results.

Step 2: Layering the Powder

  • Metal Powder Spread: A thin layer of metal powder is evenly spread across the build platform using a precision roller or recoater. The powder’s particle size and uniformity are critical for consistent density and quality.
  • Powder Materials: Commonly used powders include stainless steel, titanium, aluminum, and cobalt-chrome. Finex3D also offers customization with other alloys to meet specific needs.

Step 3: Binder Deposition

  • Inkjet Printing Technology: A high-resolution print head selectively deposits microscopic droplets of liquid binder onto the powder bed, bonding the particles to form the desired geometry.
  • Layer-by-Layer Construction: After completing a layer, the build platform lowers slightly, and the process repeats until the part is fully formed. The result is a "green part" that holds its shape but lacks final strength.

Step 4: Post-Processing the Part

  • Curing: The green part is placed in an oven to harden the binder, improving its structural integrity for handling and further processing.
  • Sintering: The part is heated in a controlled atmosphere furnace to fuse the metal particles, removing the binder and creating a dense, solid structure. Typical sintering temperatures range from 1200°C to 1400°C, depending on the material.
  • Optional Infiltration: For certain applications, the part may be infiltrated with molten metals like bronze to fill any remaining porosity, achieving near-full density and improved strength.
  • Finishing: Additional processes such as polishing, coating, or machining are applied to enhance aesthetics or meet specific functional requirements.

Applications of Metal Binder Jetting

Luxury and Fashion

  • Bespoke Designs: Creation of unique and customized pieces that cater to individual tastes and trends in the luxury and fashion sectors.
  • Rapid Prototyping: Quickly producing prototypes for new fashion accessories or luxury goods, allowing for faster iteration and market testing.

Jewelry

  • Intricate Details: Manufacturing of highly detailed and intricate jewelry pieces that require precision and fine craftsmanship.
  • Custom Orders: Efficiently producing custom-designed jewelry to meet specific customer requirements without high costs.

Watchmaking

  • Precision Components: Fabrication of precise watch components such as bezels, cases, and intricate gears with high accuracy.
  • Limited Editions: Producing limited-edition watch parts that maintain high quality and uniqueness.

Others

  • Miscellaneous Applications: Suitable for a wide range of other industries and applications that require high-precision metal parts, such as electronics, automotive accessories, aeronautics parts with lower weight while remaining as strong as molded parts and decorative items.

Looking Ahead: The Future of Metal Binder Jetting

Metal Binder Jetting is positionned to become a cornerstone of next-generation manufacturing. As the technology evolves, we can expect further improvements in material properties, production speed, and integration with automation. These advancements will enhance the competitiveness of this printing process compared to traditional manufacturing methods, unlocking new possibilities for innovation and efficiency across various industries.

Innovations on the Horizon

  • Advanced Print Heads: Enhancements in resolution and speed will allow for finer details and faster production cycles.
  • Automation: Fully automated systems will streamline powder handling, part removal, and post-processing, significantly increasing efficiency.
  • New Materials: Expansion of the material library, including aluminum and other reactive metals, will broaden the application possibilities of MBJ.

Conclusion

Metal Binder Jetting is a pivotal advancement in additive manufacturing, offering unparalleled speed, cost efficiency, and the ability to produce complex, high-precision parts. From luxury and fashion to jewelry and watchmaking, MBJ proves to be a versatile and scalable solution for industries striving for innovation and efficiency.

Finex3D: Unlocking the Advantages of MBJ for All

Metal Binder Jetting isn’t a distant promise, it’s here today, transforming how we design, prototype, and manufacture metal products.

At Finex3D, we make this cutting-edge process accessible to everyone: from global brands launching collections to independent designers creating their first prototypes. With our expertise in MBJ, we ensure every project combines speed, precision, and craftsmanship.

Upload your 3D file. Let us handle the complexity. Watch your vision take shape in metal.