My dear friend Susan, learning of Dr. Inkenstein's Grayish-Blue-Black quest, asked a great question: 'Can't you mix inks to get the exact color you want?'
And of course you can. I've done it. Lots of others have, too. But you might run into problems when two inks from different sides of the tracks clash and start a feud. The results: SITB, or as it's technically known, Slime/Stuff/Shinola In The Bottle.
Recently Dr. inkenstein had to dump an eyedropper glass bottle of Fireball, a custom red-orange mix, because of SITB. Also a bottle of Everflo True Blue, which was not a mix at all. And it's harder to clean a contaminiated (and potentially beloved) pen than dump a bottle, so no matter how it hurt, out the bottles went.
Then, when mixing inks, there is also the factor of losing one or more components of the inks, such as Wetness, Flow, Lubrication, Bulletproofness.
Ink. It's kinda like science! You need a lab coat, test tubes, a Jacob's Ladder, and maybe even lightning!
So on to testing more loads of blues and blue-blacks:
And yes. You can tell that Diamine China Blue is in no way even remotely blue-black. But I included that color to make a point. Probably.
And yet...what of the Misty Blue? Has it BB elements, hints? And the Akkerman? Is it BB? Indigo?
Where do you draw the line? And with what color?