What Sandpaper To Use For Grinding Glass
Silicon Carbide Waterproof Sandpaper
Why? Silicon carbide is harder than glass and provides a consistent abrasive action.
Format: Use wet/dry sandpaper (designed for use with water) to reduce heat and dust.
Grit Range: Start with coarse grits (80–220) for shaping, then progress to fine grits (400–3000+) for polishing.
2. Grit Progression Guide
| Purpose | Grit Range | Remarks |
|---|---|---|
| Rough Grinding | 80–120 grit | Removes sharp edges or large flaws. |
| Smoothing | 220–400 grit | Eliminates scratches from coarser grits. |
| Fine Polishing | 600–1500 grit | Prepares for final polish. |
| Mirror Finish | 2000–3000+ grit | Use with water for a glossy surface. |
3. Key Tips for Success
Always Use Water: Lubricate the glass with water or a specialized glass-cutting fluid to prevent overheating and dust.
Submerge the glass in water or spray it while sanding.
Work Gradually: Never skip grits (e.g., jumping from 80 to 1000). Move step-by-step to avoid deep scratches.
Tools & Techniques:
For flat surfaces: Wrap sandpaper around a flat block for even pressure.
For edges or curves, use flexible sanding pads or diamond hand files.
For polishing: Finish with a cerium oxide paste and a felt wheel for a crystal-clear result.
Safety First: Wear gloves, goggles, and a mask to avoid inhaling glass dust.
Work in a well-ventilated area.
4. Common Mistakes to Avoid
Use aluminum oxide sandpaper (too soft for glass).
Dry sanding (causes cracks and hazardous dust).
Applying excessive pressure (let the grit do the work).
