I've really been enjoying Robert Oster blues lately, so let's take a look at Robert Oster Blue Night. I purchased my samples of ink from Goulet Pens.
Blue Night is a dark saturated blue.
In large swabs there is a little bit of dark pink sheen.
Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.
Dry time: 40 seconds
Water resistance: Low
Show through: Medium
On 20 pound copy paper the ink behaved well, no issues that I noticed.
Ink swabs for comparison, left to right (top to bottom for mobile RSS): Robert Oster Darkstar Blue, Robert Oster Blue Night, and Robert Oster Midnight Sapphire. Click here to see the Robert Oster inks together. Blue Night seems to be the most saturated of the three inks. Darkstar Blue and Midnight Sapphire only have a tiny bit of sheen while Blue Night has medium sheen.
I used a broad Pelikan M805 Vibrant Blue on Tomoe River paper. The ink had a nice wet flow.
Overall, like most of Robert Oster's blues, it's a well behaved, pretty ink. Give it a try, you might love it.
Disclaimer: I purchased this ink myself. All photos and opinions are my own. There are no affiliate links on this page.