Dark Matter Black - 30 ML - Ocean Fountain Pen Ink is a lightfast, archival, brilliant, waterproof, non-spreading, non-toxic, fine artist pigment liquid colour designed specifically to flow through fountain pens without clogging. This highly saturated ink maintains a good shine and shading on high grade papers and maintains limited feathering and bleed through even on low grade papers. It can be used for lettering, writing and calligraphy purposes.