Diamine fountain pen inks offer one of the broadest and most well-loved colour ranges in the fountain pen world. The collection includes dependable everyday shades like black, blue, and blue-black, as well as expressive reds, greens, purples, browns, and softer pastel tones. We’ve grouped together all Black and Black leaning colours, so it’s easier to find the perfect Black ink.

Each colour is formulated for consistent flow and clear colour payoff, allowing the character of the ink to show without overwhelming the page. Some shades offer subtle shading depending on paper and nib choice, while others provide solid, uniform coverage making the range suitable for everything from note-taking and journalling to correspondence and creative writing.

With such a wide spectrum available, its easy to find a colour that suits your writing style, mood, or project whether you prefer something understated or something with a little more personality.

80ml glass bottle

Water-based fountain pen ink

Made in England

Suitable for most fountain pens

Available in a wide range of colours

Paper & bleed-through
Diamine inks perform best on fountain-pen-friendly paper. On thinner or more absorbent paper, you may notice some show-through or feathering, especially with wetter pens or broader nibs. For best results, pair with quality paper designed for fountain pens.

Flow & drying time
These inks are smooth-flowing and generally well-behaved. Drying time will vary depending on the colour, nib size, and paper used, but is typically suitable for everyday writing without excessive smudging.

Cleaning your pen
Diamine inks are water-based and easy to clean. Regular rinsing with clean water is usually sufficient. If you change colours often, a quick flush between fills helps keep colours true and prevents mixing.

Storage
Store the bottle upright, with the lid tightly closed, away from direct sunlight and extreme temperatures. Properly stored, fountain pen ink has a very long shelf life.

Compatibility
Designed for use in fountain pens only. Not suitable for dip pens, technical pens, or brush pens unless explicitly stated by the manufacturer.