Low Viscosity Black Ink for Ball Pen has a pH level of 6.5 ±0.5 and 1.135 ± 0.005 specific gravity. The Black Ink has deep colour and is featured with instant starting, very less gooping, excellent smoothness and ensures no static leakage. The Black Ink that comes under F-Series and HT-115 model has good wear resistance and is suitable for photocopy. Low Viscosity Black Ink for Ball Pen is especially formulated for fine tips.