White fused alumina 500# 600# 700# 800# for Gelcoat coating
White fused alumina was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase alpha-Al2O3.
| Size | D0 | D3 | D50 | D94 |
| 240# | ≤127 | ≤103 | 57±3.0 | ≥40 |
| 280# | ≤112 | ≤87 | 48±3.0 | ≥33 |
| 320# | ≤98 | ≤74 | 40±2.5 | ≥27 |
| 360# | ≤86 | ≤66 | 35±2.0 | ≥23 |
| 400# | ≤75 | ≤58 | 30±2.0 | ≥20 |
| 500# | ≤63 | ≤50 | 25±2.0 | ≥16 |
| 600# | ≤53 | ≤41 | 20±1.5 | ≥13 |
| 700# | ≤45 | ≤37 | 17±1.5 | ≥11 |
| 800# | ≤38 | ≤31 | 14±1.0 | ≥9 |
| 1000# | ≤32 | ≤27 | 11.5±1.0 | ≥7 |
| 1200# | ≤27 | ≤23 | 9.5±0.8 | ≥5.5 |
| 1500# | ≤23 | ≤20 | 8±0.6 | ≥4.5 |
| 2000# | ≤19 | ≤17 | 6.7±0.6 | ≥4.0 |
