S. NO. |
DESCRIPTION |
GRADE |
MICRON SIZE |
INCHES |
1. |
Coarse I ‘O’ |
SGB – 2 |
600 – 800 |
0.023 – 0.033 |
2. |
Coarse II ‘BL’ |
SGB – 3 |
425 – 600 |
0.016 – 0.023 |
3. |
Medium ‘C’ |
SGB – 4 |
250 – 425 |
0.009 – 0.016 |
4. |
- |
SGB – 5 |
212 – 425 |
0.008 – 0.016 |
5. |
- |
SGB – 6 |
212 – 300 |
0.008 – 0.011 |
6. |
- |
SGB – 7 |
180 – 300 |
0.007 – 0.011 |
7. |
- |
SGB – 8 |
125 – 250 |
0.005 – 0.010 |
8. |
Fine ‘AD’ |
SGB – 9 |
106 – 212 |
0.004 – 0.008 |
9. |
Superfine I ‘AF’ |
SGB – 10 |
90 – 150 |
0.003 – 0.006 |