Ink Review #326: Robert Oster Thunderstorm


It's new releases week, and today's new release is Robert Oster Thunderstorm. As soon as I saw a swab of this ink I knew I had to give it a try because it looked amazing. I purchased my sample of ink from Vanness Pens


The color:

Thunderstorm is a beautiful dark blue black. It is the color of the sky during a thunderstorm. 



In large swabs there is some pretty maroon sheen, which is interesting because the sheen on the col-o-ring swab looks green.


Writing samples:

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

Dry time: 30 seconds

Water resistance: Low

Feathering: None

Show through: Medium

Bleeding: none

Other properties: medium shadinglow sheen, and no shimmer.

On Staples 24 lb copy paper there was some feathering in every nib size as well as a bit of bleeding, so it's not an ink I would recommend for cheap paper.

Comparison Swabs:

Ink swabs for comparison, left to right (top to bottom for mobile RSS): Robert Oster Blue Black, Robert Oster Thunderstorm, and Bungubox 4B. Click here to see the Robert Oster inks together. RO Thunderstorm is more of a true blue black, and RO Blue Black is more of a dark purple. 

KWZ Warsaw Dreaming, Diamine Blue/Black, and Sailor Sei-boku. Click here to see the Blue Black inks together.


Longer writing: 

I used a broad Pelikan M600 Turquoise on Tomoe River paper. The ink had a slightly wet flow.


Overall, I love this ink. I love the color. The shading is great and has an average dry time. I think it's one of my new favorite blue blacks.

Disclaimer: I purchased this ink myself and all photos and opinions are my own. This page does not contain affiliate links.