The comments and item description of this ink do not accurately describe its performance. I bought this ink as a go to workhorse for large, detailed dip pen illustration and found that it was an unusual specialty ink that's qualities make it inappropriate for illustrators.
It is very high quality with more pigment and shellac than any other ink I have used giving it a beautiful satiny luster and darkness on the page. This thickness is due to an extremely high shellac content. Because of this it never feathers even on soft papers and can produce extremely fine detail.
The shellac however makes it unusable for anything more than a quick drawing. It dries on the nib within ten to fifteen minutes and is so thick it must be scraped and washed off under water. Over The course of a six hour illustration it had to be washed off over thirty times and still caused erratic and inconsistent lines. The more you use the ink the more these problems accumulate.
The ink dries on the tip so thick it causes skipping in lines and inconsistency in stippling. In addition small pieces of dried ink can come of the nib at any time ruining an illustration. Eventually the ink will accumulate to a point where it causes the entire reservoir to be dumped onto the page. This ink was tested with the G nib, mapping pen and a flex nib and worked worst with the smaller nibs. The shellac also lends the ink a satin finish which, though it is pretty, is problematic for scanning. This ink is in every aspect; line work, stippling flow and consistency, outperformed by a budget india ink like speedball. Even when diluted, the shellac to pigment ratio is too high to make this ink function properly and it's unreliable performance can easily ruin hours of work, unacceptable for most illustrators.
Nevertheless the ink is of very high quality and looks beautiful, I could see it having fine art or calligraphy applications though I would not use this with a nice brush as it will abrade the bristles. Hope this is helps people know what they are getting and if anyone does use this for inking manga every day please post how to deal with the nib clogging.

Very good ink for drawing comics or other illustrations; very black and permanent. The bottle is very nicely designed as compard other bottles of other india ink manufacturers; it is wide and not narrow which makes it easier to insert your brush or dip pen into the bottle.

My fave ink is French Sennelier india ink but this Kuretake is second best in my opinion.

I really appreciate the fast drying for copic proof and water proof and such, but what I don't like about it is that when it fast drys on my g pen, every time I take it off with water and a tissue, the ink comes off in pieces of chunks and that's when it messes up my nib badly. Comparing that to DELETER black 6, it's the worst I have ever tried for creating manga! DX

Kuretake Manga Ink
Pros: Thick, Very Black Ink. Smooth flow. Dries quickly to reduce smudging on drawing. VERY WATER RESISTANT! Comes in a great 60ml container that's topple proof w/ a very wide mouth to make ink dipping easier!
Nitpicks: DO NOT use Copics/ Alcohol markers with this ink. Because it dries fast, it tends to build up dry ink residue on the nib-clean with alcohol or any other liquid/solution that helps remove waterproof ink.

Final thoughts: Excellent ink. Great glossy finish. Very dark. And a great ink to use with watercolors! Nitpicks aside this is one of the best inks out there in the manga market!

Awesome ink, the best i have ever tried! Unfortunately, this ink dont work with copics. If you are not going to use copics with it, then i really recommend!