on saleRobert Oster Summer Storm - 50ml Bottled Ink

Product Code RO-50910

In Stock

out of stock

on saleRobert Oster Summer Storm - 50ml Bottled Ink

Product Code RO-50910

In Stock

out of stock

50ml Bottle

50ml plastic bottle of Robert Oster Signature fountain pen ink in the color Summer Storm.

Robert Oster Signature Inks are handmade in Australia. The recyclable PET bottles are manufactured in Australia's first carbon neutral plastics plant.

Note: Robert Oster is in the process of changing the labels on their bottle and the label on the bottle you receive may vary from what is pictured here.

A message from Robert Oster:

My great interest in fountain pen inks – and by extension inks that combine many creative applications – began with the birth of my love of fountain pens in 1989.

As Robert Oster Signature Inks are quite recent to the market, think of the interim between 1989 and today, as the fertile ground into which my present love of all things ink was seeded and grown.

The contents and packaging of my Inks are all nature friendly and the colours a genuine inventory of the Australian palette.

Robert Oster Signature originates from one of the most famous wine producing regions of the world, the Coonawarra district of South Australia, an idyllic setting with great influence on the senses. There is my inspiration. It’s a joy to share it with you.

Robert Oster
Bottled Ink
Bottle Material
Bottle Opening Diameter
17.4mm (0.69in)
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 15 reviews
Savannah D.
Gorgeous Purple & Blue!

This ink is very pretty! It goes down more blue & then once it dries - it's purple! It flows very well! I've had it in my Lamy Safari and a TWSBI 580 and it looks great in both! I could still see shading with the EF. It's a really good ink!

Love the Color and Flow

I think this ink is delightfully wet in my TWSBI Eco Stub. It performs well. The color is my favorite gray. I'm just the right light and on some paper, it will give a twinge of purple. I wish it were a hair more purple which is why it is four stars instead of five.

Phil H.
Not dry -- flows well!

I just got a sample in of this ink, since I was excited by the color but was uncertain about the reviews.Now that I've actually used it (in a medium nib TWSBI Eco-T) I don't find this ink dry -- in fact, it's sufficiently wet in the pen I'm using.

Poorly behaved ink � a real disappointment

I had such hopes for this ink! The color is so interesting. But, alasnot to be. I have tried this ink in a wide variety of pens � and all nib sizes � and it performs poorly in all of them, even those with the best flow. The ink is so dry that it's effortful to write with it and isn't the joy of fountain pens how delightful it is to write with them? Save your moneythere are so many better performing inks out there!

Julia F.
Almost illegible it's so pale

I am profoundly disappointed in this ink and will not be buying another by Robert Oster. It's dry. It's puts down so little pigment that it gives the impression of a pen running out of ink. I was easily able to detect wetness on the paper, but very little color. Not at all like the swatch. I used the website to compare Summer Storm with Monteverde Tanzanite (which I also own). They appeared to have about equal saturation, with summer storm being more gray, Tanzanite more vibrant. The Tanzanite color swatch accurately portrays both color and saturation. The Summer Storm does not. I have two Monteverde purples, both beautiful and well-behaved. I am completely satisfied with the Diamine (2), Pilot (2), Noodler's (4), Lamy (1) and J.Herbin (1) inks I have purchased. This is the first bad experience I've had. I put the Summer Storm in an TWSBI Eco-T which had performed beautifully with Lamy Green ink, and with Tanzanite (after the Summer Storm � I was wondering if there was something wrong with my pen!). On the positive side, it was very easy to remove every trace of Summer Storm from my pen � there was so little pigment. I will give the bottle of Summer Storm to a friend (and lover of fountain pens & ink) at church tomorrow so she can try it. I'll see if her experience is like mine.

FAQs about Bottled Ink

Which pens can accept this ink? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Any of these fountain pens will work with bottled ink. Typically, as long as the pen can be filled with a converter, has a built-in filling mechanism like a piston, or can be eyedropper-filled, it can accept bottled ink.

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.

My ink smells funny, is it safe to use? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Generally yes! Ink does not smell good- it usually has a chemical smell, along with other scents such as sulfur, rubber, chemicals or even paint. However, as long as you’re not seeing anything floating in the ink, it should be safe to use.

It’s cold and my ink froze; is it safe to use? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Yes, frozen ink will not hurt your pen (after it’s thawed of course!) The issue with ink freezing is primarily a concern because certain glass bottles could break as the water-based ink expands, and then you’d have a mess!

What is your return policy for bottled ink? 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.