Tom's Studio Iris Fountain Pen Ink – featuring the packaging, bottle and a swatch on paper

Fountain Pen Ink - 11 Iris

One of the rainbow’s most beautiful shades - a wonderfully rich purple.

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The finest British-made fountain pen ink suitable for all pens. Named for Iris, Greek Goddess of rainbows, this little bottle of goodness contains one of the rainbow’s most beautiful shades – a wonderfully rich purple.

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 ink, enough to keep you going for reams of writing, drawing, or doodling.
  • All of our fountain pen inks are water-based, acid-free, non-toxic and vegan.

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.

Shipping costs are calculated at checkout.

For dispatch times, customs details, and more, please visit our Delivery page. Got a question? Just reach out via our Contact form – we’re here to help!

Buy 3 Fountain Pen Inks – Get the 3rd Half Price

 
Tom's Studio Deep Black Fountain Pen Ink – featuring the packaging, bottle and a swatch on paper

Fountain Pen Ink - 01 Deep Black

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

¥3,000
 
Tom's Studio Mallard Fountain Pen Ink – featuring the packaging, bottle and a swatch on paper

Fountain Pen Ink - 07 Mallard

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

¥3,000
 
Tom's Studio Marianas Fountain Pen Ink – featuring the packaging, bottle and a swatch on paper

Fountain Pen Ink - 14 Marianas

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

¥3,000
 
Tom's Studio Juniper Fountain Pen Ink – featuring the packaging, bottle and a swatch on paper

Fountain Pen Ink - 12 Juniper

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

¥3,000

Customer Reviews

Based on 260 reviews
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(242)
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S
Sara

Just incredible. This wasn’t my first purchase and it won’t be my last.

e
elizabeth o.
dove grey ink!

i love this ink so very much, i now have 2 bottles! it is a super colour and it is my new go-to ink! i also purchased the studio fountain pen in plum! i adore it but i struggle to remove it from the cap when closed. i have been writing with an assorted variety (and number) of fountain pens for over 50 years. if you have a hint to make opening this pen easier, please let me know!
thank you kindly and good day!
elizabeth

M
Martin

Love this Strawberry Jam ink it is a lovely colour - have put it in one of my new Wren Pens.

K
Kym

Now i need more colors !

J
Juan

It’s like it says on the bottle. Darkest black. Love it.

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