Ink Review #2709: Robert Oster Gummy Shark

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Robert Oster Gummy Shark was an exclusive ink from The 2024 Melbourne Pen Show. You can find this ink for sale at Vanness Pens until they sell out.

The color:

Gummy Shark is supposed to be a medium grey, but to me it reads way more purple than grey.

*For my swab cards I use a Col-o-ring by Skylab Letterpress, a medium Pilot Ishime and a Mabie Todd Swan.

Swabs:

In large swabs on Tomoe River paper the ink has some interesting shading.

Writing samples:

Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.

*For my writing samples I use:

Dry time: 15 seconds

Water resistance: Low

Feathering: None

Show through: Medium

Bleeding: None

Other properties: medium shading, no sheen, and no shimmer.

On 20 lb copy paper the ink had some feathering and bleeding in the larger nib sizes.

Comparison Swabs:

Gummy Shark reminds me a lot of Summer Storm-another Robert Oster ink that’s supposed to be grey but is more purple. Click here to see the grey inks together.

Longer Writing:

I used a Lamy Safari Petrol with a medium nib on a Taroko Enigma notebook. The ink has an average flow.

Overall, I like this ink as a medium purple. It’s interesting and has some character. As a grey ink it leaves a lot to be desired. If you like this color then it’s a good idea to order some sooner rather than later since it’s an exclusive ink.

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Disclaimer: All photos and opinions are my own. This page does not contain affiliate links and this post is not sponsored.