Gel Pen Ink Pigment Base

Properties	Blue	Black	Red	Green
Ref.	SG 400 BLU	SG 400 BLK	SG 400 RED	SG 400 GRN
Brookfield Viscosity at 25°C, 12 rpm by 63 LV Spindle (cps)	2000 ± 200	2000 ± 200	2000 ± 200	2000 ± 200
Sour Alkalinity (pH)	7.72	8.33	8.56	7.89
Surface Tension (d/cm)	39	39	38	39
Specific Gravity (g/cm³)	1.0215	1.035	1.0551	1.0519
Particle size (µ)	0.3 - 0.5	0.3 - 0.5	0.3 - 0.5	0.3 - 0.5
Water Resistance	Excellent	Excellent	Excellent	Excellent
Writing	Smooth	Smooth	Smooth	Smooth
Pigment % in ink	7%	7%	7%	7%
Tip Used (CRI / WI / ESSEM)	0.5 - 0.6 mm	0.5 - 0.6 mm	0.5 - 0.6 mm	0.5 - 0.6 mm

Centrifuge speed – 1000 rpm & centrifuge time – 10 min.
Minimum 2 years when stored in tightly sealed containers under proper conditions.

Compatible with rollerball and gel pen tips (including needle and conical types).
Suitable for tip sizes ranging from 0.5 mm to 1.0 mm
Works well in plastic refills with controlled ink flow mechanisms.
Ideal for pens using a pressurized or gravity-based ink feed.
Designed for use in pigment-compatible writing systems for smooth and skip-free writing.
Performs well in pens tested under high temperature and long-duration writing tests.
Available in standard (Blue, Black, Red) and Special colours on request.