SPI A1 Finish
SPI A1 Finish (SPI A1 Mold Finish) is the first grade of the SPI Finish Standard. The finish features:
- Typical Surface Roughness Ra : 0.012 to 0.025 μm
- Finish Look: super high glossy finish (mirror finish)
- Finish Method: Grade #3, 6000 Grit Diamond Buff
- Suugested Steels: S136 (54HRC) or 8407(52HRC)
- Suggested Plastics: Acrylic and PC
*Other SPI finishes are: SPI A2, SPI 3, SPI B1, SPI B2, SPI B3, SPI C1, SPI C2, SPI C3, SPI D1, SPI D2, SPI D3.