# ST-3
Finally, I can settle in and talk with you all about the ST-3.
The development journey of the ST-3 has been a winding one. Along the way, we switched manufacturing partners twice, all in pursuit of a closer, more synergistic collaboration. For us, this wasn’t just about creating a single product—we wanted the ST-3 to lay a solid foundation for the entire ST series that follows.
The ST-3 will incorporate several new technologies. We’ve worked closely with our partners to integrate their technical expertise, while also continuing to explore the practical application of various forward-looking innovations.
Early in the R&D process, we started with materials. We carefully compared imported raw materials from companies like BASF, Toray, and Mitsubishi, conducting extensive research into the properties and performance characteristics of each. What we concluded is this: craftsmanship matters more than the material itself, but that doesn’t mean materials are unimportant. In fact, high-quality raw materials define the performance ceiling of a product—better materials allow for higher potential.
Next, we focused our energy on process refinement. We examined the structure of various synthetic fibers—biomimetic, protein silk, cross-pattern, diamond-pattern, flat-silk—and analyzed the strengths and traits of each. We evaluated how well they fit the shaving brush use case and whether they could deliver the tactile experience we envisioned for the ST-3. Beyond the base structure, we also refined the tip finishing process: tip length, taper design, multi-taper grinding, split ends, and more. Every choice was made to enhance the ST-3’s overall performance in feel, backbone, water retention, and lathering efficiency.
Surface treatment was another key consideration. A matte finish improves water retention but looks more understated; a glossy finish gives a natural, oil-like sheen similar to animal hair but reduces water retention slightly—each involves a trade-off. Parameters like the ratio of straight to curved fibers, filament thickness combinations, and curvature of bent fibers are equally critical. Adjusting any one triggers a chain reaction, and greater complexity also means higher cost.
For the colorway, after much discussion, we settled on a “Finest two band” inspired scheme. While several synthetic knots in this style already exist, we optimized our version to better capture the look of genuine finest two-band badger hair.
The ST-3 is now nearing release. We’ve tested countless combinations of processes and materials, with only a few options left for final selection. If everything stays on track, the ST-3 is scheduled to launch in June—and we’re committed to delivering a product that truly satisfies.
For now, I’ll keep a few of the specs under wraps. When the time comes, we’ll introduce the product in clear, straightforward terms—no overly technical jargon, just what you need to know.
Thank you for your time.
Carry