Diamine Registrar’s Ink Blue-Black – Waterproof Archival Fountain Pen Ink (100ml)

By Diamine
£14.99 £16.50
Earn points
07 Feb. Estimated arrival
04 Feb. Order placed
05-06 Feb. Order dispatches
07 Feb. Delivered!
🚚 Order within the next 2 hours, 15 minutes for delivery by 07 Feb, 2026.
Description

This is the sensible, long-term option. Diamine Registrar’s Ink Blue-Black writes onto the page in a composed blue, then gradually oxidises to a permanent black as it bonds with the paper. The effect is quietly reassuring — nothing flashy, just writing that stays exactly where you put it.
Used for generations to record births, deaths and marriages, this is genuine archival-quality fountain pen ink, waterproof once dry and entirely resistant to fading, smudging or second thoughts. Supplied in a generous 100ml refill bottle, it’s ideal if you write often, sign important documents regularly, or simply dislike running out of ink at inconvenient moments.

Why You’ll Love It

  • Properly Permanent: Always waterproof and archival once dry, so your writing never fades, runs, or washes away.

  • A Living Colour Shift: Writes blue, then oxidises naturally to black for immediate clarity and lasting permanence.

  • Made for Regular Use: The 100ml bottle keeps you well supplied without constant refills or replacements.

Specifications That Matter

  • Classic waterproof registrar’s ink

  • Archival quality, designed for official documents

  • Suitable for all fountain pens

  • Traditionally used by Registrars and Clergy

  • Made in the UK

  • Supplied in a 100ml plastic refill bottle

  • Packaging may vary slightly from the image shown

This is the sensible, long-term option. Diamine Registrar’s Ink Blue-Black writes onto the page in a composed blue, then gradually oxidises to a permanent black as it bonds with the paper. The effect is quietly reassuring — nothing flashy, just writing that stays exactly where you put it.
Used for generations to record births, deaths and marriages, this is genuine archival-quality fountain pen ink, waterproof once dry and entirely resistant to fading, smudging or second thoughts. Supplied in a generous 100ml refill bottle, it’s ideal if you write often, sign important documents regularly, or simply dislike running out of ink at inconvenient moments.

Why You’ll Love It

  • Properly Permanent: Always waterproof and archival once dry, so your writing never fades, runs, or washes away.

  • A Living Colour Shift: Writes blue, then oxidises naturally to black for immediate clarity and lasting permanence.

  • Made for Regular Use: The 100ml bottle keeps you well supplied without constant refills or replacements.

Specifications That Matter

  • Classic waterproof registrar’s ink

  • Archival quality, designed for official documents

  • Suitable for all fountain pens

  • Traditionally used by Registrars and Clergy

  • Made in the UK

  • Supplied in a 100ml plastic refill bottle

  • Packaging may vary slightly from the image shown

Read more...
Delivery & Returns

 

Orders £35+ UK Royal Mail delivery within 5 days, Monday to Friday. Free on orders over £35.  FREE
Tracked Delivery 48

Royal Mail 48, tracked. Delivery within 48 hours, Monday to Friday. Tracking number provided.

£3.99
Tracked Delivery 24

Royal Mail 24, tracked. Delivery within 24 hours, Monday to Friday. Tracking number provided.

£4.99
Next Day Delivery Delivery on the following working day on orders purchased before 12:00pm, 5 days a week. You'll receive a tracking number with updates about the progress of your order. Signature required.

£7.99

International Delivery

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