Ink Review #281: Robert Oster Midnight Sapphire


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.


The color:

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

Feathering: None

Show through: Medium

Bleeding: None.

Other properties: Medium shadinga tiny bit sheen, and no shimmer. The sheen is only visible in large swabs on Tomoe River paper.

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.


Longer writing: 

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.