Robert Oster Signature Ink - Ink Bottles (92 colors)

Author: Vanessa

Review Title: Fantastische inkt

• Review Add on: 05-06-2026
• Average Rating: (5)

Ik was voor mijn Twsbi Diamond 580 ALR in Prussian Blue op zoek naar een bijpassende inkt en kwam via een video op YouTube bij Robert Oster Tranquility uit. En daar heb ik nog geen spijt van gehad. De inkt is prachtig van kleur, vloeit goed en schrijft zo lekker dat ik hem inmiddels in drie pennen heb zitten. Ik ga zeker eerst bij Robert Oster kijken als ik nog een kleur nodig heb.

Author: N

• Review Add on: 21-02-2026
• Average Rating: (4)

I bought the Caffe Crema. Nice shader. A bit dry but that’s what provides the shading.

Author: Matt

Review Title: Beautiful vibrant blue

• Review Add on: 01-02-2026
• Average Rating: (5)

Wonderful shading with just a touch of pink sheen on the edges of a few of my letters during typical writing. Doesn’t smear like some other sheen inks. Wonderful!

Author: Rick

Review Title: Yellow Sunrise

• Review Add on: 05-12-2025
• Average Rating: (3)

Yellow Sunrise is right on the edge of what you can still call truly yellow(e.g. Herbin Bouton d'Or), but it's a bit darker while managing to not be pulled too far towards orange(e.g. Rohrer & Klingner Helianthus). It's perfectly legible under artificial lighting to my eye, unlike most yellows without lots of orange in them.

Author: Birgit Walter

Review Title: Dusky Pink

• Review Add on: 22-10-2025
• Average Rating: (5)

A very nice, bright and highly pigmented color that provides a nice ink flow and the pen glides over the paper. Love the Robert Oster inks

Author: Carlos Pires

Review Title: Robert Oster: Grun Schwarz

• Review Add on: 12-09-2025
• Average Rating: (5)

I asked Joost for help with a dark green colour, without shading, shimmer or sheen, that would be office-friendly.
He recommended this one to me, and I can say I'm very pleased with how the ink behaves. It's a beautiful colour, quite dark but not quite black. It's perfect for breaking away from the usual black, blue, and dark blue colours in the workplace.
Thank you very much, Joost.

Author: LB

• Review Add on: 08-05-2025
• Average Rating: (5)

Summer storm is one of my favorite inks!

Author: JbJ

Review Title: Gorgeous color

• Review Add on: 25-04-2025
• Average Rating: (4)

Such a beauriful color and amazing quality. Writes perfect on differebt types of paper

Author: Yuriko Yamamoto

• Review Add on: 29-02-2024
• Average Rating: (5)

I purchased Evening Sapphire. I don’t know why but Robert Oster Inks have a special spark for me. It hits different than other brand inks. I love the dusky light blue color and the shading of this ink.

Author: Laura

Review Title: Never disappointed!

• Review Add on: 28-06-2023
• Average Rating: (4)

These inks are always incredibly well-behaved and come in unique colours that I haven’t seen from other brands (especially the Shake ‘n’ Shimmy collection). I only wish they came in glass bottles, but that’s a minor complaint

Author: Stefan Heeren

Review Title: Robert Oster - Summer Sky

• Review Add on: 25-06-2023
• Average Rating: (4)

Tested with Pilot Capless 'B', Clairefontaine 90 GSM paper.

This is my first Robert Oster ink. Summer Sky is a light blue color that is comparable to, for example, Pilot Kon-Peki or Akkerman Passage Blue. This ink is not particularly dry or wet and has quite a bit of shading.

Author: Arno Jacobs

Review Title: My favorite Blue Black - Midnight Sapphire

• Review Add on: 21-06-2023
• Average Rating: (5)

I have some blue black in my ink collection that are all great inks, but they don’t have the right colour I was lookin for. At the Appelboom shop in Laren I browsed through a binder full of colour examples. I decided to go for a bottle of Robert Oster Midnight Sapphire. Lucky for me they had it in stock.

The ink is now in a pen with a broad nib. It flows well and the pen is writing very smoothly with it. On average, depending on paper it has medium shading.

Some might call it more of a dark blue than a blue black. It does depend on the paper but it’s a blue black on (white) Oxford paper and fountain pen friendly printer paper. In some cheap notebooks the pen writes wetter and the it becomes more of a dark blue.

What I like is when there is decent shading. The dark parts become dark blue and the lighter parts medium blue black.

Author: Erik

Review Title: Great ink!

• Review Add on: 10-08-2022
• Average Rating: (4)

This is a wonderful ink, great colour, Nice flow, no hard starts in any fountain pen. Recommended!

Author: Rheza Leo

• Review Add on: 13-04-2021
• Average Rating: (5)

Beautiful ink. Well lubricated with subtle sheen creating halo effect.

Author: Katja Engelkamp

Review Title: Robert Oster Signature Turquoise

• Review Add on: 09-01-2021
• Average Rating: (5)

The ink of my choice was not available, so Joost choose another color for me. He did a great job with that. I love the RO inks, bright, vibrant colors, great flow, very useful bottles and not unimportant: the name of the ink is on the top of the cap, so I don’t have to take all my bottles out to find the one I’m looking for. I wish all the brands did that! This turquoise is on the teal-side of the spectrum and perfectly fit with my Wahl Eversharp Signature in Jade. That is the same material as the Leonardo Furore Grande Smeraldo is made of, so that would be a perfect match too!

Author: Erik

Review Title: Robert oster Fire and Ice

• Review Add on: 18-12-2020
• Average Rating: (4)

Great ink, special colour!

Author: Florence B.

Review Title: Thanks Appelboom !

• Review Add on: 18-08-2020
• Average Rating: (5)

I asked Appelboom to choose a color for me, cause the one I wanted wasn't available.
I received Pinky and Morning Mist, and it was a very good choice for me ! I like them both. Appelboom has a really nice team, thank you so much ! :-)

Author: Lyndon

Review Title: Peach en Marine

• Review Add on: 19-04-2020
• Average Rating: (4)

Handige fles, prachtige kleuren en schrijft goed. Is dan ook wat duurder dan een flesje Diamine. Jammer dat niet alle inkt van RO te krijgen is in Nederland! Zo had ik bijvoorbeeld graag de Shake'n'Shimmy lijn kunnen bestellen.

Author: Inge

Review Title: Robert Oster Summer Storm and Graphite

• Review Add on: 03-07-2019
• Average Rating: (5)

I love Robert Oster inks. Well-behaved ink and nice to write with, but it’s also fun to make art with them. If you think Summer Storm and Graphite are grey and black, add the ink to a wet surface and you’ll be surprised by the colours appearing.
Of course the service by Appelboom was also good, as always.

Author: Tjeerd Bruinsma

Review Title: Robert Oyster Bondinblue

• Review Add on: 23-06-2019
• Average Rating: (5)

Mooie blauwe inkt die varieert van azuurblauw tot nachtblauw.
Geeft een luxe uitstraling aan je vulpenhandschrift.
Wel een wat dikkere inkt

Author: Sandra

Review Title: Great inks

• Review Add on: 19-04-2019
• Average Rating: (5)

I now own several Robert Oster inks, including Fire & Ice, Fire on the Lake, and Australian Sky Blue. All are very vibrant colors yet easy to clean.

Author: Leno

Review Title: Beautiful inks

• Review Add on: 08-04-2019
• Average Rating: (4)

I only own the Fire & Ice ink.
This ink flows very well, and have a decent shading in red which is pretty good under the sun.
It's price could be better, but in general is a really good ink.

Author: Rasmus

Review Title: Great Inks

• Review Add on: 13-03-2019
• Average Rating: (5)

I now own three inks from Oster: Grün-Schwarz, Burgundy and Fire+Ice. Each has a character of its own, that I am very fond of. It flows smooth and leaves lovely shades and the occasional sheen as well (I use them mainly to write, so I am mainly using them in fountain pens). Find your favorite color and go for it. I did and I am happy with them.

Author: Gerald Ruiter

Review Title: Prachtige inkt

• Review Add on: 20-04-2018
• Average Rating: (5)

Ik heb inmiddels meerdere potjes met verschillende kleuren in bezit. Afhankelijk van het soort papier en de dikte van de penpunt geeft deze inkt een prachtige “shimmering and sheen”. Mijn favorieten zijn Tranquility en Fire and Ice. Aanrader en snel geleverd door Appelboom.