I’m running this in a Vac 700R with a fine nib and quite simply it is the best black. Flows great and is like writing with the void itself. I was hesitant because I already had Pelikan 4001 but TWSBI Black is just a MASSIVE UPGRADE.

Purchased this ink specifically to blend my lines into my watercolor illustrations. Typically I use archival waterproof ink but love when my ink bleeds. I have also found it to be an incredible ink for general purpose and journaling, such a perfect black ink. Works on regular index card paper well but it is a dream ink in my plain LT1917.

A very black ink! One of the darkest I have come across yet!

Been using this ink for several years.

TWSBI Black is one of the best black inks, I have been unable to source a TWSBI Black here in the U.K so have asked a friend to bring some bottles when he comes over from California, that is how much I recommend this ink.

I am very happy with this ink. It is a true black and flows very well in my TWSBI Diamond Mini pen. It also dries quickly. It is everything I want in an ink.

Nice ink. My test pen is a Junlai 630 seal version fine point nib. Not a hugely expensive pen. Most of my writing is done on standard office store grade printer paper. How this ink might perform in other pens and on other paper I cannot say.
In my conditions of use this ink flows well. No skips, no strange. ...(This reviewsiteSUCKSBIGTIME!!!) The ink doesn't blob or flow through the paper. It doesn't spread out. It is a dark luxuriousblack. I like it. My pen likes it. Thanks to TWSBI and to Goulet!

Beautiful ink.

Looked for this for a while & finally saw it here at G Mart. Nice. Good product & great service as always. But I always seem to get the little chocolate sucker instead of cherry. What’s up with that?

Got it as a start ink, definitely black. Not need for another shade of black lol

I watched a variety of reviews of Black ink and thought I'd give this one a try. I like to get a bottle of ink if & when I get a new pen. Never tried TWSBI ink. The ink works well in this Estie, with it's {M} nib. The bigger the nib, usually it's bit smoother. That's been my experience, but not always. It's a really dark ink, flows very well, drys quickly on fountain pen ink paper [rhodia Ivory Clairefontaine Paper 90 g/m] and the bottle looks cool :-). I might try another color from TWSBI.

Love this ink!

Good solid black, not grayish, with an affordable price. Can't think of any reason not to like this ink.

Great black for the price

Honestly a great purchase, a lot of high quality ink for a low enough price tag, the coloring and qualities of the ink are excellent , definitely would recommend

After years of using Noodlers Heart of Darkness, the 'late' Drew Brown's informal comparison convinced me that Twisbi Black was blacker than Noodlers. Time to make a change.

flows great, dries fast on paper doesnt clog pens

repurchase of a favored ink for my TWSBI Vac700R

Doesn't smear and dries quickly, but not too quikcly

I enjoy this shade of black. Though it is my first black ink, I have no complaints thus far.

Is this ink the blackest black? Yeah, it's pretty dark! However, if you use it, don't expect your page to dry the same day. I have so many smeared pages in my notebooks because of this ink. I have nearly an entire bottle that needs a good home.

Everything I was interested in was wonderfully packaged. Great pen and ink.

I've only used this with a Kaweco EF nib, but it's a straightforward black with no surprises. Writes great right from the start, unless you leave the pen uncapped for few minutes. Seems to dry pretty quickly on the nib if not being written with. Mind you, I live in CO, where the climate is very dry, so that could have something to do with it. Overall very happy with this ink, won't be needing another black.

I bought this ink as part of a birthday gift. It was well received. I do know it prompted a look at various reviews and instructional videos. I assume it was acceptable. It was their first real fountain pen, a TWSBI Swipe. and I bought this ink so it could be filled.

I like it but dont knoe how to rate it dont know enough ant tenichalitiesvcdimknoe I like very much The pen, I used only Four or five times till my cat Got it To and it disappered

VERY nice flat black ink. Just prefer Pilot Iroshizuku Take-Sumi. Comes beautifully out of my 580 and looks good in any demonstrator. For any opaque pen get Take-Sumi since I get bubbles in it. Demos love this ink!

The 70ml size is perfect for lots of different projects from calligraphy to filling pens. It's always nice to have a plain black for random uses and this is a great option.

This is a very good matchup with my Vac700R pen. Comparable to my usual Parker Quink in color depth, flow and dry time. As noted in another review, the Vac20A cap seems to fit this bottle so I could fill the pen directly if I wanted to risk a spill. Very nice ink at a moderate price. I look forward to trying it in some of my other pens.

Rich black color and very saturated. Was using it in a M Lamy 2000 so this might be the reason for the almost excessive wetness, but even with how wet it was, it wouldn't bleed or feather even on low-quality paper.

I can not answer for my nephew's experience. He was very impressed with packaging and included candy pop.

My first time using ink for my first fountain pen the TWSBI eco pen and love it. It writes as a true black.

Excellent color and flow. Will buy again!!