1) Very smooth in writing
2) Follower required
| Properties | Blue | Black | Red |
|---|---|---|---|
| Ref. | SB 600 BLU | SB 600 BLK | SB 600 RED |
| Brookfield Viscosity at 20°C, 12 rpm by 64 LV Spindle (cps | 3000 ± 500 | 3000 ± 500 | 3000 ± 500 |
| Sour Alkalinity (PH) | 6.52 | 6.78 | 6.52 |
| Surface Tension (d/cm) | 36.00 | 37.00 | 36.00 |
| Specific Gravity (g/cc) | 1.100 | 1.110 | 1.100 |
| Water Resistance | Good | Good | Good |
| Writing | Smooth | Smooth | Smooth |
| Pens kept at 50°C for 30 days | Flow OK | Flow OK | Flow OK |
| Tip Used (CRI / IWI / ESSEM) | 0.6 - 1.00 mm | 0.6 - 1.00 mm | 0.6 - 1.00 mm |
