on salePilot Iroshizuku Kosumosu - Ink Sample

Product Code IS-PN69220

In Stock

out of stock

on salePilot Iroshizuku Kosumosu - Ink Sample

Product Code IS-PN69220

In Stock

out of stock


A 2ml sample of Pilot Iroshizuku Kosumosu (Cosmos) pink fountain pen ink, in a labeled plastic vial.

Ink Samples
Fast Drying

Whether or not the ink contains glittery particles.

Freeze Resistant

Whether or not an ink is specially formulated to better withstand freezing temperatures.

Iron Gall

Ink made from iron salts and tannic acids. Though quite permanent and waterproof, these inks are typically known for causing chemical corrosion to metal pen parts (especially the nib) and should be used sparingly or with less-valuable pens.


Whether or not an ink is specially formulated to increase flow in your pen.


Whether or not the ink contains finely-ground solid particles in liquid suspension.

Water Resistant

Whether or not the ink, once dried on the paper, will resist being washed away with water.


Customer Reviews

Based on 11 reviews
Kosumosu samplr

This was an awesome way to try an ink before buying a full bottle. It was the perfect pink.


i bought it on someone's recommendation, but it's not my taste. but i think bright pink is impressive.

Jonathan L.
Beautiful ink very pink!

Beautiful color if you need a light light red.

My pink of choice!

I have tried many, many pink inks. While this is most comparable to Sailor 130, this ink just GLIDES on the paper while I had trouble with the Sailor in my TWSBI F nib. As a lefty, it dries pretty quickly�as fast as any other pilot pen does (I own G-2s that I swore by FOR YEARS and still do). It dries fast enough for my side writer-ness to have to underwrite, but if I forget to, my writing doesn't smear. Of all the pinks I've tried, this I'll buy a bottle of for sure. It is just SO smooth.

suzie Q.
Very Pretty

I had tried a couple of other pink inks, one looked more like red, another bled a lot... but this one is very pretty and is smooth, dries moderately fast, and hasn't bled. I really like it so far.

FAQ about Ink Samples

How do I fill my fountain pen from an ink sample vial? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

It depends on the fountain pen's filling mechanism.

Check out our blog post on How to Fill a Fountain Pen from an Ink Sample Vial.

How much writing can I do with 2ml of ink? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

It really depends on how big or small you write, and the nib size you’re using. We find that usually you can get 2 good fills for a typical converter with our Ink samples, or one good fill with a piston-filling pen. How much writing depends on you more than anything else, so we recommend experimenting with different nib sizes to find what works best for you. 

What is shading, sheening, or shimmering ink? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Shading - A common (and often desired) result of a fountain pen ink pooling in certain parts of a letter when writing, so that the color and saturation of the ink appears different within a single letter or word. This characteristic cannot be achieved with ballpoint or rollerball pens and is a very appealing aspect of fountain pen use for those particularly drawn to all the pretty ink colors.

Sheen - Characteristic of a fountain pen ink where when ink pools another color can be seen on top of the ink, especially when looked at in different light angles using certain paper types. There is no way to guarantee an ink will sheen, but using a larger nib on a pen will help obtain sheening results in your writing.

Shimmering - Fountain pen ink that has small particles of glitter mixed in.

Is shimmering ink safe to use in fountain pens? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Yes! Shimmering ink is a great way to add some flare to your writing. We have found that a larger nib will showcase more shimmering particles while writing, but you can use any nib size and shimmering ink. All the ink we sell is safe for use in fountain pens.

You can learn more in our blog: How to Write with Shimmering Ink.

What's your return policy for ink samples? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

We do not accept returns for ink that has been used. Otherwise, we accept returns on unused ink products for up to 30 days from purchase. You can read all our Return Policies here.

To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.