on saleRobert Oster Tranquility - Ink Sample

Product Code IS-RO-50116

In Stock

out of stock

on saleRobert Oster Tranquility - Ink Sample

Product Code IS-RO-50116

In Stock

out of stock


A 2ml sample of Robert Oster Tranquility fountain pen ink, in a labeled plastic vial.

Robert Oster
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 7 reviews
A new favorite

Really love this ink. It reminds me a lot of Emerald of Chivor, but without the shimmer. Great flow, and with the right paper, you get some beautiful sheening. In my experience, the sheen shows up better on Tomoe River than Rhodia, but you still get some nice color variation with the latter.

Super B.
Robert Oster Tranquility: An Ink that POPS!

I've always enjoyed fountain pen inks that fall into the blue / green arena, and this ink certainly does that. It flows well and takes a bit of time to dry, but overall, this Oster ink delivers. Similar inks to this include: Diamine Steel Blue and de Atramentis Herbs de Provence.

Good Ink

Pretty cool teal ink! Similiar to the Colorverse Morning Star but a little bit greener.

Deep greenish teal with great sheen

As far as samples go, I highly recommend any Robert Oster ink that looks like a color you'd use, as every Robert Oster ink I've sampled has been amazing. But I definitely recommend this ink - Tranquility has tons of buzz in the fountain pen community for a reason. Tranquility is a deep teal with lots of green, similar in shade to J. Herbin Emerald of Chivor or Pilot Iroshizuku Ku Jaku. When using the sample, I've found that it looks much greener than the sample on the website, so if you're looking for more of a bluish dark turquoise I'd recommend sampling both this and Fire and Ice to see which one you like best. What really separates the quality of this ink from other teals inks of similar shade is its intense sheen - it's one of the highest sheening Robert Oster inks of the ones that I've tried. I've also seen some subtle shading while using it as well. The ink goes on wet and takes some time to dry, but it's worth the wait for the beautiful sheen that appears as the ink dries.

Beautiful Turquoise Ink

This is a beautiful turquoise ink with some shading even in a fine point pen (Lamy Safari F). I'll likely get a full bottle of this.

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.