on saleDiamine Onyx Black - Ink Sample

Product Code IS-D7053

In Stock

out of stock

on saleDiamine Onyx Black - Ink Sample

Product Code IS-D7053

In Stock

out of stock


2ml sample of Diamine Onyx Black 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 17 reviews
Black As Night

I love the black line on the page. No messing around with shading or shimmer or sheen. Just a nice solid line. Love the samples. I'll be ordering some more as soon.

Whitney W.
my favorite black ink

this is my favorite black ink. its so nicely saturated and wet.

Jill D.
Great Ink!

Very wet and shiny from a Jinhao 159 with a Noodler's untipped flex nib. I don't think it shades at all, but I was looking for a dark and shiny, robust black and this is it. Takes a while to dry since this particular setup is VERY wet. I've got a Goulet two-tone EF nib that makes a super-tiny thin line I'm anxious to try it with. Does stain your fingers for a while, so don't spill it on your white sweatpants! This is a must-have ink for me, and I'm ordering a bottle right now.

A reddish black

I bought a sample vial of Onyx Black while trying to find a black that I liked well enough to buy a full bottle of. Having tried some of Diamine's other inks and being satisfied with those, I thought I would try this one. I received the ink sample, swabbed out a small q-tip's worth onto some bright white paper and found that after it dried, the ink takes on a very reddish color. Kind of like a burgundy ink with some black ink mixed in, if that makes it any easier to picture. It most definitely did not end up being as dark and truly black as the example swab on the product page here. Anyway, I inked up one of my pens with it and decided a swab isn't going to be entirely indicative of how the ink looks coming out of a pen onto paper. So, to give it a fair fight for my approval, I wrote with it on a sheet of Clairefontaine Triomphe blank 90g white stationary paper. On that same sheet, I wrote with De Atramentis Document Black and Herbin Perle Noire. Out of those three blacks, the only one that appears actually true black is the Herbin Perle Noire. That was yesterday. Today, I take that same sheet of Triomphe paper and before tossing it in the garbage, I decide I want to see how well the Document Black holds up to water. I thoroughly soaked the sheet of paper under the faucet front and back and will admit that the Document Black held up perfectly. No effect whatsoever from the water. The Herbin Perle Noire slightly washed away but is still very well survived. But this ink, the Diamine Onyx Black washed almost completely away! There is only the faintest of evidence that this ink ever existed on the sheet. This will explain my 'Low' rating for water resistance.

An Ink that grows on you!

When I first used this ink... I thought it sort of has a very faint shade of brown to it,... but the more I used it it seem to get darker, so it could just be me. This ink grows on you. Awesome ink!

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.