Diamine Registrar’s Ink Blue-Black – Waterproof Archival Fountain Pen Ink (30ml)

This is ink with a strong sense of responsibility. Diamine Registrar’s Ink Blue-Black flows onto the page as a traditional blue, then quietly oxidises to a permanent black as it bonds with the paper. The transformation is subtle, dignified, and entirely intentional.
Long trusted for recording births, deaths and marriages, this is genuine archival-quality fountain pen ink — waterproof once dry and resolutely uninterested in fading, smudging or revisionist history. Made in the UK and still used where permanence truly matters, it’s the sort of ink that takes its job seriously, even if you’re only writing a very important shopping list.

Why You’ll Love It