For engineers and researchers working at the intersection of optics, microfluidics, and precision manufacturing, one limitation has persisted for years: truly transparent 3D printing at the micro scale has been out of reach. Existing options either fall short on optical clarity, require extensive post-processing, or simply can’t achieve the feature resolution that demanding applications require.
That changes today. Boston Micro Fabrication is launching BMF Clear — an optically transparent photopolymer resin engineered specifically for micro-precision 3D printing, delivering greater than 90% light transmittance alongside the micron-level accuracy that BMF’s platform is known for.
Achieving true optical clarity in 3D printed parts is not simply a matter of using a clear material. At the micro scale, two physical phenomena work against you: material absorptivity and surface roughness. Even minor imperfections in surface finish cause light to scatter and diffract, which destroys transmission performance in applications like optical waveguides, microfluidic channels, and integrated photonic devices.
BMF Clear has been formulated and optimized specifically to address both of these challenges. The result is a material with genuine optical transparency — not the translucency that “clear” resins have historically delivered — combined with the superior surface quality achievable through BMF’s Projection Micro Stereolithography (PµSL) technology.
BMF Clear is designed for seamless integration with BMF’s 10-micron and 25-micron systems, printing at layer heights between 10 and 50 microns. Compatibility spans BMF’s full platform range — from high-end production systems to the compact, benchtop microArch® S150 series — making it accessible whether you’re running a research lab or scaling toward production.
The combination of ultra-high-resolution printing and BMF Clear’s material properties minimizes light scattering through internal channels and achieves the fine feature fidelity that optical applications demand. No mandatory post-processing is required, meaning teams can move faster from design iteration to functional testing.
The more significant implication of BMF Clear is what it unlocks for applications that have historically been difficult or impractical to manufacture at scale.
In microfluidics and lab-on-a-chip development, optically clear perfusable channels enable precise visualization and analytical reliability — critical for applications like high-resolution droplet generation and cell culture assays. Until now, many researchers have relied on PDMS soft lithography, a method that limits scalability, durability, and design flexibility. For teams specifically exploring PDMS alternatives for microfluidic fabrication, BMF Clear offers a compelling path: the design freedom of additive manufacturing, the dimensional accuracy of micro-precision printing, and none of the mold-making overhead.
In micro-optics and integrated photonics, the material supports the direct fabrication of freeform lenses printed onto fiber optic tips, chip surfaces, or sensor arrays — as well as complex waveguides and photonic interfaces for sensing and high-speed data communication. These are components that have faced significant manufacturing challenges at scale, and BMF Clear makes them addressable with standard additive manufacturing workflows.
For biomedical applications, BMF Clear has passed rigorous biocompatibility testing for skin irritation, sensitization, and in vitro cytotoxicity, opening additional possibilities in device miniaturization — including endoscopic systems, intraocular tools, and minimally invasive drug delivery applications where internal visibility and dimensional fidelity are non-negotiable.
One of the more practical advantages of BMF Clear is that it doesn’t just serve early-stage research. By pairing true optical transparency with micron-level precision and BMF’s established manufacturing platform, it provides a credible path from proof-of-concept to scalable production. As John Kawola, CEO of Boston Micro Fabrication, puts it: “BMF Clear resin directly addresses this challenge, bridging the gap between prototyping and production-level micro-manufacturing.”
That bridging capability is what makes this more than a materials announcement. For teams working on next-generation optical components, microfluidic devices, or integrated photonic systems, it represents a meaningful expansion of what’s achievable with additive manufacturing.
BMF Clear is available now through direct sales and BMF’s European distribution network. To learn more or request a sample, visit bmf3d.com.
