I have a number of blue black iron gall based inks, so I thought I'd do a comparison. In addition to the usual color comparisons, and water tests, I thought I'd see how they looked when newly applied vs dried for over 24 hours.
I'll note that I bought Diamine's Registrar's Ink years ago, but had to get rid of it when it turned on me. After a couple of years on the shelf, the ink developed some dark gritty iron-like sediment in the bottom of the bottle which didn't mix when shaken, and the color of the remaining ink was watery grey, at best. When it was new, it was an exact match for Akkerman #10, which confirms my suspicions that Akkerman Ink is nothing more than rebottled Diamine. Not that that's a bad thing - I love Diamine Ink - but it helps with ones expectations. I hope Akkerman #10 doesn't turn on me...
I found that most of the IG inks changed color almost instantly from light blue to dark blue or nearly black except for R&K Salix, which changes color gradually to a medium blue black. Already, as I write this I can see the colors darkening...
My not-so-objective test also found the following:
Smoothest (most lubricated) ink - Montblanc Midnight Blue (IG), followed by Akkerman #10
Driest (least lubricated) ink - ESSRI followed by Pelikan Blue Black
Easiest bottle to fill from - Akkerman #10 unique glass necked 60ml bottle
Hardest bottle to fill from - ESSRI's plastic 110ml bottle
Fastest drying ink - ESSRI or Akkerman #10
Longest to dry - Montblanc Midnight Blue
Most water resistant - ESSRI & Akkerman #10 (tie), followed by R&K Salix
My favorite...hard to tell. Like my kids, I like each for a different reason.
Pen used - Brause .75mm dip pen with overfeed
Paper used - Clairefontaine Pupitre 90g
Good luck in your own ink adventures.
Edited by Jared, 02 August 2014 - 19:01.