Grade I (First Quality)
- Perfect surface finish with no visible defects.
- Uniform color and consistent laminate structure.
- Free from scratches, bubbles, delamination, stains, or surface imperfections.
- Meets standard dimensional tolerances for thickness and flatness.
- Recommended for applications requiring both excellent appearance and high precision.
Grade II (Second Quality)
- Maintains the same essential mechanical and electrical insulation properties as Grade I but may have minor cosmetic or manufacturing defects.
- Possible imperfections include:
- Light surface scratches or scuff marks.
- Minor discoloration or color variations.
- Small surface bubbles or resin-rich areas.
- Slight surface irregularities.
- Minor edge or corner damage.
- Slightly wider dimensional tolerances.
- These defects are cosmetic in nature and generally do not affect the material’s performance in most industrial applications.
Summary
| Grade I | Grade II |
| Flawless appearance | Minor cosmetic defects |
| Standard dimensional tolerances | Slightly wider tolerances |
| Premium quality finish | Economical alternative |
| Suitable for visible or precision applications | Suitable for machining and general industrial use |