Ink Review #489: Pilot Iroshizuku Kosumosu

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Today’s ink is Pilot Iroshizuku Kosumosu. Pilot does a great job with their Iroshizuku line. You can find this ink at Pen Chalet.

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The color:

Kosumosu is a pretty pink. It looks much paler on the Col-o-ring than it does on other papers.

Swabs:

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In large swabs the ink is a gorgeous bright pink, and has just a tiny bit of gold sheen.

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Writing samples:

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

Dry time: 15 seconds

Water resistance: Low

Feathering: None

Show through: Medium

Bleeding: Low

Other properties: low shading, tiny sheen, and no shimmer. The sheen is only visible in huge swabs on Tomoe River paper.

On Staples 24 lb copy paper there was feathering in every nib size, and some bleeding in the flex and broad nibs.

Comparison Swabs:

Ink swabs for comparison, left to right (top to bottom for mobile RSS): Pilot Iroshizuku Tustsuji, Pilot Iroshizuku Kosmosu, and Pilot Iroshizuku Yama-budo. Click here to see the Pilot inks together.

Kobe 30 Oji Cherry, Colorverse 40 Girls Just Wanna, and Robert Oster Pinky. Click here to see the pink inks together.

Longer writing:

I used a broad Twsbi Eco Pink on Tomoe River 68. The ink had a wet flow. This ink matches the pen really well.

I used a broad Twsbi Eco Pink on Tomoe River 68. The ink had a wet flow. This ink matches the pen really well.

Overall, I love this ink for spring. It has a great flow, a happy, cheerful color, and it dries pretty quickly too. It’s a bit brighter when wet, and dries just a bit lighter. I’m glad I have a full bottle of this ink since it’s one I use often.

Disclaimer: I purchased this ink myself, and all photos and opinions are my own. This page does contain affiliate links, but this post is not sponsored in any way.