This was the new Noodler's Flex nib pen with watercolor...Platinum Carbon Black ink.
You do need to wait a minute or so when you're using a heavy application of ink, on this paper (Fabriano HP) to let it dry thoroughly, because it doesn't sink into the paper.
I do love those lines!
Here's a comparison with my beloved old vintage Waterman 152, from the 1920s...it was almost out of ink, so the lines are lighter, but you can see almost the same variation in line is possible...
Overall, very happy with the pen, as well as with that ink!
