Bead blasted finish is a surface treatment process that uses spherical media (typically glass beads) propelled at high pressure to create a uniform, non-directional matte texture on metal, plastic, or composite components. Unlike brushed or polished finishes that show directional grain lines, bead blasting produces a consistent satin appearance that hides scratches and fingerprints while providing excellent adhesion for subsequent coatings like paint, powder coating, or anodizing.
For manufacturers looking to sell on Alibaba.com, understanding surface finish specifications is increasingly important as B2B buyers become more technical in their procurement requirements. The bead blasted finish has gained popularity across aerospace, automotive, medical device, and consumer electronics industries due to its balance of aesthetics, functionality, and cost-effectiveness.
Bead Blasted Finish: Key Technical Parameters
| Parameter | Typical Range | Impact on Final Product |
|---|---|---|
| Surface Roughness (Ra) | 0.8-6.3 μm | Affects coating adhesion and visual appearance |
| Glass Bead Size | 70-230 mesh | Smaller beads = smoother finish; larger beads = more aggressive texture |
| Air Pressure | 60-100 PSI | Higher pressure = deeper texture but more material removal |
| Material Removal | 0.0001-0.0005 inches | Minimal dimensional change, suitable for precision parts |
| Media Recyclability | 20-30 cycles | Significant cost savings on consumables |

