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Dual-sided surface — fine grain face for charcoal
The finely adjustable pump valve combined with the robust felt tip lets you control ink flow precisely
dual-position mixing tray
Special features with writers such as Quiet
Hardcover 243 x 167 mm
On The Run OTR.988 Ball Pen Fluid 100 ml Colors:Green Dual-sided surface — fine grainOTR. 988 Ball Pen Fluid is a highly concentrated alcohol based ink gel designed for mixing, not for direct use. It's thick, heavily pigmented, and built to be added to existing inks or paints to deepen color intensity, boost opacity, and increase pigment saturation. Comes in multiple colors including black, blue, red, green, and violet. Writers and artists use this to create custom ink blends stronger, darker, richer than standard inks. Mix it into
