Diamine Fountain Pen Ink – Onyx Black – 30mL

Diamine Fountain Pen Ink – Onyx Black – 30mL. Onyx Black Standard 30mL More Diamine Inks About Diamine: Diamine inks have been manufactured in the United Kingdom since 1864. They are well-known for their fine quality fountain pen ink, calligraphy/drawing ink, and stamp pads. Even decades later and with advancements in technology, Diamine only changes the original formulas where necessary to comply with current legislation. Due to its high quality, Diamine fountain pen inks are suitable for all brands of pen.