It's new ink week, so let's talk about Robert Oster Great Southern Ocean. You can find it at Pen Chalet.
Great Southern Ocean is a beautiful dark blue. Robert Oster does a great job with his blues.
In large swabs there is a little bit of shading and some pretty reddish sheen.
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
Show through: Medium
On Staples 24 lb copy paper there was some feathering in every nib size as well as some bleeding, so it's not an ink I would recommend for cheap paper.
I used a medium Kaweco Sport Lagoon Blue then switched to a Pelikan 400N on Tomoe River paper. The ink had an average flow.
Overall, Robert Oster creates amazing blues and this one is no exception. Well behaved, good color, good shading and even a little bit of sheen.
Disclaimer: I purchased this ink myself, and all photos and opinions are my own. This page does contain affiliate links.