1) Very smooth in writing
2) No follower required
| Properties | Blue | Black | Red |
|---|---|---|---|
| Ref. | SB 400 BLU | SB 400 BLK | SB 400 RED |
| Brookfield Viscosity at 20°C, 12 rpm by 64 LV Spindle (cps) | 5500 ± 500 | 5500 ± 500 | 5500 ± 500 |
| Sour Alkalinity (PH) | 6.81 | 6.44 | 6.81 |
| Surface Tension (d/cm) | 41.00 | 36.00 | 36.00 |
| Specific Gravity (g/cc) | 1.125 | 1.083 | 1.111 |
| Water Resistance | Good | Good | Good |
| Pens kept at 50°C for 30 days | Flow OK | Flow OK | Flow OK |
| Tip Used (CRI / IWI / ESSEM | 0.7 - 1.00 mm | 0.7 - 1.00 mm | 0.7 - 1.00 mm |
