Before
After
Objective
Develop a finishing process to bring investment-cast sterling silver jewelry—including rings, earrings, and necklaces—to a bright polished finish without manual sanding or hand finishing.
Jewelry investment castings often require extensive hand work to remove surface irregularities and achieve a consistent polished appearance. The goal was to improve surface finish and polishing consistency across multiple part types while reducing labor-intensive manual finishing.
| Part Description | Sterling Silver Jewelry (Rings, Earrings, Necklaces) |
| Industry | Jewelry |
| Fabrication Method | Cast/Molded |
| Material | Sterling Silver |
| Process Technology | Burnish |
| Equipment Type | Roll Burnisher |
Solution
Bel Air developed a burnishing process to refine the surface of assorted sterling silver jewelry components and achieve a bright polished finish directly from investment-cast parts.
The parts were processed in an FM Bruni 3 roll burnishing machine to smooth metal surfaces and improve overall finish quality while preserving fine casting details across rings, earrings, and necklace components. This controlled mechanical action refines the surface without removing material, helping maintain the geometry of delicate jewelry features.
This process allowed the parts to achieve a consistent polished appearance across multiple part types without the need for manual sanding or hand polishing using abrasive paper.
The result is a repeatable, production-ready process that:
- Produces a bright, uniform finish across all jewelry components
- Preserves fine details and delicate geometries
- Reduces or eliminates manual finishing labor
If you are unsure what equipment and media you require to achieve your desired surface finish, then send us your part, and we will evaluate it and provide you with a metrology report.