Tom's Studio Deep Black Fountain Pen Ink with two pens with inky goodness on paper with an ink swatch demonstrating the colour

Fountain Pen Ink - 01 Deep Black

Classical doesn’t have to mean boring, the very deepest of blacks.

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The finest British-made fountain pen ink suitable for all pens. Classical doesn’t have to mean boring. Deep, dark, and long-lasting, this tried-and-tested favourite isn’t simply ‘black’ – it’s every colour combined to create the deepest of blacks.

Transform the way you create with an ink colour that sets you apart!

Most pens offer ink cartridges in a limited selection of colours. I want to change that by bringing you this range of beautifully rich and distinctive inks – with no need to dispose of or replace an empty cartridge.

These wonderfully free-flowing inks come in a number of beautiful and nuanced shades. They truly are a joy to write or create with!

  • Each bottle holds 50ml of this lovely ink, enough to keep you going for reams of writing, drawing, or doodling.
  • All our inks are water-based, acid-free, non-toxic, and vegan-friendly.
  • Each ink comes beautifully presented in a stunning bottle with an antique laid paper, gold-foiled label.

Our fountain pen ink is compatible with all Tom’s Studio Pens, including calligraphy (The Flourish, Carrot, and Bloom), fountain (The Studio and Studio Pocket), and fineliner (The Lumos and Lumos Mini).


Fountain pen inks are highly 'layerable', allowing you to build different intensities or colours by applying more or less ink on the paper. Please note that the colour on the label may not perfectly represent the colour achieved when using different pens or techniques.


Because the ink has such a concentrated colour, you can dilute it with a smidge of water (ideally distilled) to create watercolour-like washes and depth of colour.

We aim to process your order within 1-3 working days. Please note that this increases to 1-4 working days for orders that include any personalisation, such as engraving.

Shipping costs
Shipping costs are calculated at checkout.

Delivery times

  • UK: 1-2 business days
  • Europe: 3-5 business days
  • USA: 5-7 business days
  • Rest of world: 8-10 business days (duties may apply on delivery)

Please refer to our Delivery page for more information, and reach out to us at hello@tomsstudio.co.uk if you have any further questions.

BUY 3 tom's studio fountain pen inks - save 20%

 
Tom's Studio Deep Black Fountain Pen Ink with two pens with inky goodness on paper with an ink swatch demonstrating the colour

Fountain Pen Ink - 01 Deep Black

Classical doesn’t have to mean boring, the very deepest of blacks.

£14.95
 
Tom's Studio Mallard Fountain Pen Ink with two pens with inky goodness on paper with an ink swatch demonstrating the colour

Fountain Pen Ink - 07 Mallard

A deep blue-green, like the plumes of a mallard duck

£14.95
 
Tom's Studio Marianas Fountain Pen Ink with two pens with inky goodness on paper with an ink swatch demonstrating the colour

Fountain Pen Ink - 14 Marianas

This deep blue ink reflects the ocean’s mystical depths.

£14.95
 
Tom's Studio Juniper Fountain Pen Ink with two pens with inky goodness on paper with an ink swatch demonstrating the colour

Fountain Pen Ink - 12 Juniper

What better inspiration than the Juniper plant, with its delicious bounty of deep purple berries.

£14.95

Customer Reviews

Based on 151 reviews
93%
(140)
3%
(5)
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M
Mike B.
A very fine writing implement

I bought the Lumos mini to replace all the biros and fine liner pens I discard every year. Hopefully this means I’m no longer swelling the tons of plastic waste that are wrecking the planet. If you’re not part of the solution…………
I’m thrilled skinny with the pen itself, it’s well made and looks great, and the purple ink shows just enough flamboyance in my notes and diary entries.
Big thumbs up from me.

A
Ailsa
Beautiful colour ink

Lovely colour ink for my Tom's studio pen from a self-confessed stationery addict.

J
Jamie L.
Awesome colour!

Who knew forest green ink could make my grocery lists look like Thoreau's journal? Now when I scribble 'Buy more cheese,' it feels like I'm penning profound observations about nature. My shopping has never been so transcendental!

L
Lesley W.
Blacker than my soul

What a gorgeous deep black colour! Not wishy washy, in that it’s a little see through. It’s a beautiful true black colour. I love using it.

J
Jane U.
Beautiful

Most attractive shade of dark pink/purple

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