I used this ink in my TWSBI Eco EF nib pen, for drawing. I loved it until one day it started randomly leaving blobs of ink on the page. This messed up a few of my drawings so I had to look elsewhere for a good waterproof black drawing ink.

I have a number of De Atramentis Document inks to use in multimedia with watercolour and gouache paints. The black tends to clog in my EF nib a bit, so I decided to try out Platinum Carbon Black. Very glad I did! Works beautifully and behaves better with my EF nibs than my other waterproof black. Does not budge once it dries, which is critical for the uses I put it to. It has an interesting feel - very much like you are writing with char from a fire or something (in a good way). Works better when writing on top of painted sections than some of my felt-tipped pens do, although it is happier direct to paper (the paints can get onto the tip of the nib a bit and impede flow slightly - but this is to be expected with any pen/ink).Only complaint I have so far is very minor and only a matter of preference. It has a tiny bit of shine to it and I wouldn't mind if it was more matte, but that's just being nitpicky. I'd say it's more of a eggshell or semi-gloss (at least on top of paint) than matte.

The blackest blackity black. Flows wet and beautiful, dries fast and dark. It has become my go to for all my pens because it makes even cheap pens feel expensive.

Superb Ink, just what I was looking for.

Expensive but worth it. Saturated black. Flows beautifully

Quick Drying, won't smear. A bit of a problem with quick drying on the nib (you have to use it very often). Aside from that I absolutely love this ink!

Great service from a good merchant who is excited about their products as I am!

I had a few inks in my collection marketed as "water resistant" or even straight up waterproof. None of then stood up to the tests I put them through and all smudged terribly. I am transcribing my mother's favorite novel as a Christmas gift, so anything less than waterproof was a no go. This ink held up great with minimal movement with a waterbrush. I even tested sweaty fingers and licked a finger and ran it over the writing to make doubly sure, and it held up perfectly! I am incredibly happy with this ink and will by buying more once I run out. It's also worked well in the TWSBI Eco I have put it in, despite the pen being an extra fine. It might get a little dry without being used for a day or two, but it never had clogged on me, never skips, and always writes smoothly and reliably.

I only wish that this ink was darker, as I know that Platinum's darkest black ink isn't as waterproof as this one is, and I much prefer a bolder and deeper black. This one, however, definitely isn't bad.

great bottle presentation. Love the color and also love that it dries quickly and is water resistant.

The perfect black ink

This is the only ink I use. I have a platinum carbon desk pen and together they are the perfect combination. I use it every day.

This black is so intense that it makes the viewer want to peel up the edge to discover what lies underneath.

I bought this ink specifically for a Zebra G flex pen, as my regular fountain pen ink was leaking out of every part. This does a much better job, and as I've used it I've started to appreciate it more as a stand alone. It's very black, no hints of other colors that I can tell, and very matte. I use Sumi ink for dip pens, and I think this would also work with them really well.

The Platinum Carbon ink is not as dark as I would like it to be, especially when looked at with the Sailor Kiwaguro black ink side-by-side. Also, this Platinum ink bleeds a bit through cheap copy paper, making it worse to write with.

Excellent black ink

Flawless ink, I use it with a sailor de fude and a twsbi eco.

I spent a lot of time looking for a good black ink for my first fountain pen. It took me time to realize it indeed is waterproof- I just had to wait for it to completely dry before highlighting or using any other ink over it. It is pretty dry after 5 minutes but I would wait at a minimum of 10+ minutes to be safe! Besides that, the ink flows beautifully through my TWSBI Eco and is the perfect amount of black! I write on Tomoe River Paper and it’s a match made in heaven.

I love the Platinum Carbon Black Ink. The color is dark and it doesn't make a ghost print on the opposite page of the spread when I close my sketchbook. I do leave my sketchbook open for a bit to make sure it's dry, but that's probably a habit from other inks that were printing on the opposite page- that has never happened to me with the platinum carbon black. I use this ink in my Platinum Plaisir, Platinum Meteor and Sailor Fude.

Requires fairly frequent pen cleaning but was found to be very water resistant! Great for addressing envelops

I was looking for a pigmented ink to use in my TWSBI Eco and this one works well. I clean it once a week and have no issues.As for water resistance, my pocket notebook was accidentally machine washed 3 times last year and the writing remained crystal clear. I also painted a thin line on a smooth rock outside. One year of rain and sun - the mark is still crisp. Nice!

I like this ink. So pretty and black going on my journal page!

The ink was used in a Noodler's Boston Safety pen for this review. I like how this ink behaves on Leuchtturm 120 g/sqm and Rhodia 80 g/sqm paper. I don't experience feathering or heavy ghosting, and the ink dries in about 60 seconds. I also like using this ink on Artist's Loft mixed media 160 g/sqm paper when doing watercolor painting. Once the ink is given time to dry or a hair drier is used to reduce this time, it holds up well against light watercolor washes. Oppositely, this ink does not work well on my basic notecards and 20 lb paper. It tends to feather and ghost quite badly on these surfaces. Overall, this is my go-to ink on Leuchtturm, Rhodia, and Artist's Loft mixed media paper. I do not use this ink on my lower quality paper.

Works well. Recommended by Peterdraws.

This is a really black, black ink. I bought this to use in the research lab to label microscope slides. This is the only thing that I can find that will reliably label the sides that have a printed label section (not frosted). It will, once dried (give it time and blot with bilbos paper) stand up to water, ethyl alcohol and xylene all effective solvents. Truly amazing. It seems to work better than even pens that are made for this purpose. I have used the Platinum carbon desk pen (fine nib) with great effect. However, they do not seem to be made anymore so I recently bought from Goulet a Platinum Perfounte Pen since it was cheep and if I messed up who cares. The pen writes wetter so more patience for drying is needed. I tried it out today with great success. The fine point writes more like a medium and the contrast is great. It will be super to use in the darkened microscope room. On paper for notes it is quite good again water proof and alcohol proof if dried, which is quick. You can put the paper under running water and the paper will disintegrate long before the ink is lost. It is smooth going on the paper with nice crisp lines. I see no downsides to this so far, except may it I is little harder to get it off your skin if you are not careful filling the pen, I truly recommend this ink. A note on dry. time. it dependent on how wet your pen writes and the nature of the surface you are writing on. It feels moderate to me.

Brilliantly waterproof and deeply black. The hunt for a good waterproof ink is over- and trust me, this stuff got put through its paces. No more digging through local stationery places for an ink that won't smear when used alongside watercolour, as shown in the photo, where I used it to ink a small watercolour doodle.

It worked well for drawing with a fountain pen and then using watecolor. The ink did not bleed after a bit of drying - 15 minutes or so. It is a beautiful black. I am very happy with it.

This is my first experience at using a converter and non-cartridge ink. I like the ink and the use model - easier than I'd expected. And the ink works well in my ink-n-watercolor sketches.

It's black black, dries fairly quickly - love it ! Just wish it was a bit less expensive -

I bought this ink specifically for use with a highlighter at work, and I am happy to report smudging and running has decreased 99% after switching to this ink. 10/10