What Are the Considerations in the Grinding Process of GRC Decorative Panels? A Detailed Explanation of GRC Surface Treatment Technology

The sanding process for GRC decorative panels requires selecting appropriate process parameters based on surface finish requirements. Rough sanding uses 60-80 grit sandpaper, fine sanding uses 120-180 grit sandpaper, and wet sanding uses 400-600 grit sandpaper. Sanding pressure is controlled at 0.1-0.3MPa, speed at 8-12m/min, and temperature at 5-35℃. Fine sanding achieves surface flatness ≤1mm/2m and roughness Ra=3.2-6.3μm.

In specific operations, relief patterns use profiled sanding heads, while curved sections use flexible sanding pads. After fine sanding, an art GRC project achieved 85% surface smoothness and 95% texture clarity, fully meeting the design intent. In contrast, the unsanded comparison sample had a surface roughness of Ra=12.5μm, compromising the visual effect.

Abrasive Selection Criteria

Rough sanding 60-80 grit; fine sanding 120-180 grit; these choices adapt to different requirements.

Process Parameter Control

Pressure 0.1-0.3MPa; speed 8-12m/min; these parameters ensure quality.

Surface Quality Requirements

Flatness ≤1mm/2m; roughness Ra=3.2-6.3μm; these requirements ensure the desired effect.

Special Area Treatment

Relief areas are meticulously refined; these treatments showcase details.

The sanding process affects the final result. Qinglong GRC's superb craftsmanship perfectly presents the design.