Having used four or five different fountain pens in college for three years for long hand notes, and hand written essasies in chemistry, biology, english, and anthropology I found them to be quite versatile.
I used Pelikan Black for a semester or two, and found it to be fine with the paper offered for exams, but caught a bug for color, and ended up writing the majority of my notes in these new colors, mostly Diamine inks.
I ended up writing most of hand written essasies with Diamine Registrars ink, it worked well, the only thing I would change is using it with a wetter nib, for increased flow, and darker oxidation of the ink. It can become quite dark black in a wet nib, but can also shade a bit as well. It handled all paper types without a hint of feathering.
The nano inks from Sailor and Platinum will be consistently blacker inks, but I have yet to use them to speak for any other quality, they do look and sound promising though.
One suggestion would to get black ink samples from a shop like The Writing Desk, and use them on the back or blank sheet of an old exam page you might have around, to see how they behave. That way you can get a greater sense of inks that look promising but may not be mentioned above.
Edited by JakobS, 05 January 2018 - 22:15.
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