FDR is a pale, silvery grey.
In large swabs the ink has a strong blue undertone.
Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.
Dry time: 20 seconds
Water resistance: Medium
Show through: Medium
On Staples 24 lb copy paper the ink feathered and bled in all nib sizes.
I used a Kaweco Al-Sport Anthracite with a medium nib on Tomoe River paper. The ink had an average flow. In this pen the ink was so pale I could barely read it.
Overall, in some nibs the ink was perfectly readable and in others (like the Kaweco pictured above) it seemed almost transparent. It’s not an ink I think I would ever use again since the performance varies so much from nib to nib, but it’s an interesting color.
Disclaimer: I purchased this ink myself and all photos and opinions are my own. This page does contain affiliate links, but this post is not sponsored in any way.