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

Fountain Pen Ink - 09 Constellation

This beautifully purple-toned ink is a clear night sky in liquid form.

Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

The finest British-made fountain pen ink suitable for all pens. Goddess of the night, Nyx is known to dwell in her mansion at the very boundary of the cosmos. Named for her and her cosmic home, this beautifully purple-toned ink is a clear night sky in liquid form.

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. If you have any questions, feel free to reach out to us at hello@tomsstudio.co.uk – we’re here to help!

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

 
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.

36.00 лв
 
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

36.00 лв
 
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.

36.00 лв
 
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.

36.00 лв

Customer Reviews

Based on 245 reviews
93%
(229)
3%
(8)
2%
(6)
1%
(2)
0%
(0)
L
Laura L.
Beautiful inks, beautiful pens

I ordered the Loch Ness ink for my Wren pen, which I love for writing and sketching. I haven’t used the ink in my wren yet but I trialled it with a dip pen and it is a beautifully deep green-blue colour that flows evenly. I will be purchasing more to build up a collection of colours! Also - the ink reservoir in the Wren seems to go on forever, I’ve only filled it once a month ago and it’s still going strong through endless work and uni notes, and sketches!

I
India M.
Fountain pen Ink, Rambling Rose

As close yet that I've come to Opera Punk in a fountain pen Ink. Beautiful

J
Judi B.
True black

Feels and looks good on paper

M
Matthew K.
Great ink

Comes out exactly the color I thought it would be

A
Andrea

Gorgeous ink color… may be the most beautiful that i’ve seen

Load More