Let's cut to the chase. This ink is so beautiful and interesting I want badly to love it and use it all the time. A rich deep black with amazing purple/metallic/bronze sheen. It's not black, it's dark blue, which is all the more beguiling. It helps my adoration. that my wife has asian hair that is exactly like this color, raven black.
Problem is that this ink is a problem child. It dries in the nib faster than lightening and on some paper never dries. I'm left handed too making drying issue worse. When it dries it says put, which is great for a super saturated ink that sheens like this one, but dang. It works more or less in a wet writing pen like my Pilot 823 Amber with broad nib. The ability to seal the pen up also helps.
I tried diluting the ink but as you can see below at 50% or 1:1 the magic is gone. Currently, I'm trying 10% or 9:1 with a tiny drop of glycerin. Jury is still out but even the dilution being 90% ink it seems the magic is mostly gone albeit it seems to behave in the pen, and on the paper, better.
I wan to conquer this ink. Oh, nurebairo, why won't you love me as much as I love you?
Paper chromatography. Yeah, not waterproof at all. And not black.
Maybe it isn't all blue... There seems to be a little tan or yellow fringe.