I'm getting closer to completing reviews of all of the Robert Oster inks, but I still have a few to go. Today we are looking at Robert Oster Midnight Sapphire. I purchased my samples of ink from Goulet Pens.
Midnight Sapphire is a lovely dark blue with a purple undertone.
When pooled there is a tiny bit of dark pink sheen around the edge, but not much. The sheen is not visible in writing. There is a strong purple undertone.
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 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 Midnight Sapphire, and Robert Oster Evening Sapphire. Click here to see the Robert Oster inks together. Midnight Sapphire is a bit darker than Darkstar Blue, but has a similar purple undertone.
Robert Oster Blue Night, Rohrer and Klingner Salix, and Birmingham Pens Observatory Celestial Blue. Click here to see the blue inks together.
I used a medium Pelikan M605 White Transparent on Tomoe River paper. The ink had a nice wet flow.
Overall, I enjoyed this ink-it's well behaved and is a pretty color. It's close enough to Robert Oster Darkstar Blue that you probably don't need both, but you can't go wrong with either one. 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.