Diamine

Diamine has been producing high-quality fountain pen ink in the United Kingdom since 1864. Known for its rich colors, smooth flow, and safe, water-based formulas, Diamine remains a trusted name for fountain pen users around the world.

Today, Diamine offers more than 100 colors, including traditional shades and vibrant modern hues. All Diamine inks are non-toxic, vegan-friendly, and formulated to perform reliably in all fountain pens. They also offer specialty options, such as:

  • Shimmertastic Inks – Add sparkle with gold or silver shimmer particles.

  • Registrars Ink – A permanent, archival ink that starts blue and oxidizes to black.

  • Inkvent Calendar – A holiday-themed annual set with exclusive, limited-release inks.

  • Custom Blends – Special formulations for unique events and historic moments.

Still manufactured in Liverpool using traditional methods, Diamine combines heritage with innovation. Whether you're journaling, sketching, or everyday writing, Diamine inks provide color, consistency, and character.

534 products