Registrars Blue Black fountain pen ink, in a glass 30 mL bottle. This is an iron gall ink which dries quickly and is waterproof and permanent
Produced in the UK since 1864, Diamine Ink offers a wide array of color choices and delivery systems, including various bottle sizes as well as cartridges for use in fountain pens.
Please note: Diamine is transitioning their bottle design to the newer style pictured here. You may receive the older or newer bottle depending on stock supply.