Sailor Kiwa-Guro Black Pigment ink, Souboku Blue-Black Pigment Ink, and Sei-Boku Blue Pigment Ink (also known as Nano inks) are now available in cartridges. These are water resistant, quick-drying inks. While we always recommend regular cleaning when using pigment inks, we have found these inks to be very safe for fountain pen use.

These cartridges are made specifically for use in Sailor brand fountain pens only.

Each pack contains 12 cartridges.