Just got this ink, it runs and feathers badly. Directly into the trash.

The ink is beautiful and flows nicely through the extra-fine nib

This is another lovely ink from Platinum. Good, solid blue.

Great permanent ink. Color is good for any type of writing.

It was bought as a basic waterproof blue. 10 out of 10! Amazing how waterproof it is. I left a piece of paper in a water bath overnight. It was still legible in the morning. I destroyed the paper when I pulled it out of the water. No feathering.

While it still bleeds-through copy paper, it doesn't feather badly. Also writes well on thermal paper (if that's useful), where Noodler's Baystate Blue tended to feather and separate into a black line surrounded by a blue haze.

This ink flows well and dries daily quickly I will be ordering more.

Excellent. I have/own(ed) a zillion blue inks, largely Noodler's, Namiki, Iroshizuku, Aurora, Waterman, but bought this one on a whim after buying a Sailor 1911 Compass pen in blue -- and I haven't looked back. I love the Waterman's Serenity Blue, it was the only blue I used for years, but it washes away in a sneeze. The Noodler's blues tend to be either too vibrant (BSB) or too tealish, I prefer the reddened-blue end of things -- and I really really wanted waterfastness and reasonable dry time and not to clog up my pen all the time. This one does it. I haven't tried it for sketching/watercolor doodling (I use D'Atramentis Archive Black for that, even Noodler's Black tends to seep a teeny bit of black into a wash), but that's not what I bought it for. It shades well on Rhodia planner paper, doesn't feather or spread much on cheap receipt paper, Staple's brand 3x5 czards, brown paper bags, or manila padded envelopes. It probably line-spreads a little on cheap copier paper, but it's a great little ink if you want your words to withstand the weather on an envelope, spilled beverages on a letter, or spilled tears on a love poem. ;-D

This ink behaves like a more feather-prone Noodler's black, that combined with its smoothness makes it a good workhorse ink. It behaves well in the pen and does not feel different from regular dye-based ink. It does stain a little if you keep it there for significant periods of time, however.On paper, It is a little more prone to feathering and bleed-through than Noodler's black but behaves well on most papers. It dries at about the same rate as Noodler's black and has similar wetness to Noodler's black. It is also as resistant to the elements as Noodler's black. Colour-wise, it behaves interestingly. On more absorbent papers this ink is a mature, muted blue. It looks like any other workhorse blue and shades rather nicely. On less absorbent papers, this ink displays a slightly higher saturation and vibrancy, it gains a gel-pen-like look (which shouldn't be surprising given it's a pigment-based ink) and shades extremely well.Overall, this seems like a good workhorse blue ink.

This is a good, solid blue, that is not hyper saturated, but well-behaved, and works well in my stub nibs. It has a degree of shading, but little to no sheen. It's very permanent, but perhaps lacks the dynamic depth of iron gall inks. In exchange, though, it's extremely water and lightfast. The only thing to watch for is that it is higher maintenance and requires a more consistent cleaning habit, particularly in pens that don't have a strong seal in the cap to prevent the nib from drying out.

If SUPERMAN needs more ink, He will probably get this

I love this ink as much as it's companion Carbon Black. This blue version is slightly less wet and saturated, making it more suitable for larger nibbled pens. It is a pleasing shade of medium blue that leans towards the brighter side.

I have now used this ink for 2 weeks and I think this ink is a very good ink for most applications where you need to write important notes. - It is not completely waterproof, but water will only remove the top layer of the ink. I use this ink for work, as it is both dependable and easy to clean out of the pen.

For frame of reference:I use a vanishing point with an EF nib for taking A LOT of notes at work to keep my memory straight on meetings, projects, etc... I'm currently doing that with a Leuchturm 1917 notebook. Compared to the comparable clairfontaine notebook, I've noticed most of my inks tend to feather more on the leuchturm and my EF nib feels scratchy and clogs with paper fibers/dust almost everyday... which makes my pen write almost like an ink brush more than a fountain pen. When I loaded up with this ink, my nib instantly felt much smoother on the leuchturm paper as if it's a lubricated ink. It creates a MUCH more pleasurable writing experience and doesn't feather on the leuchturm paper nearly as much as my other inks (except X-feather... which still feels scratchy and clogs with fibers on leuchturm paper) ...and if I go easy on the caffeine, I can write with hair-thin lines on densely annotated pages. It really is a pleasure to use. If you're using this for work notes and you pair up a more ink resistant paper with a faster flowing nib, I'd recommend keeping some blotting paper close by. My only complaint is on the saturation level of the ink. It's a very nice, professional blue, but a little on the light side. I will continue looking for the perfect blue that writes as smooth as warm butter despite the nib/paper combination, non-feathering, and deeply saturated, but this is what I'll be using until then.

Gorgeous rich blue, similar to J. Herbin's Saphir with the somewhat periwinkle color. Nice flow without being overly wet. One of my new favorites!

This ink is a perfect vibrant blue that glides across the page. It does not fade. It's a bit of a sleeper. I started out thinking -- a very nice blue with good flow and as I kept writing I fell in love with it. Not a weird blue just a deep perfect blue that looks wonderful with a fine nib and glorious with ago from a broad music nib. I keep using it and I am happier with each use.

I like it a lot! It flows well, doesn't dry out in my pens, and it is waterproof - an important consideration if you use your fountain pens for sketching as well as writing. It dries quickly, and the bottle is well designed and easy to use. I've mostly been using this ink in a Pilot Prera with a fine nib - which means finer than the usual extra fine - and there have been no issues, just reliable performance.

This is the first blue ink I've bought in many years, maybe the first since I returned to fountain pens in 1997. I am so impressed with the Platinum Carbon Black that I started using recently that I thought I would try this Pigmented Blue ink. Flows very well, nice rich blue color, and waterproof, permanent, and fast drying. Works well on cheap or good paper. The ink performed perfectly in a TWSBI Vac-700 with a F nib and a Lamy Al-Star with a 1.5mm stub nib. Great choice to add to my arsenal of inks.

This ink in a Noodler's basic piston filler with flex nib has an astounding effect. It shades beautifully, almost like a blue black ink, but still a noticeable blue. I recommend this ink for high risk jobs, it is probably the most water/ chemical resistant blue I have run into, second to non accept maybe Noodler's Bay State. I used quite a bit of my bottle thus far, it is such a pleasing color to me that I can not stop using it.Do note this ink is permanent, pigmented ink. If it dries it will clog your pen, requiring cleaning. Don't let it sit in there too long.

this is great, doesn't bleed on cheap paper, feels wet from a pen, and waterproof, washes easily. it's just that is has a bit of purple in it.

I'm an aficionado of blue and blue blacks. And of waterproof or bulletproof inks. Because of this, most of my inks have been from Noodler's. To my eye most of the current bulletproof Noodler's blues have a greenish or aqua tint which is fine but some may prefer a colder blue. Pigment Blue seems to change hue depending on the paper it writes on. In my Kunst & Papier it is a wonderful blue, and on some postcards a hue bordering on purple. It has a very consistent flow and is very well behaved. A bit pricey but worth it, in my opinion.

Decent color and solid performance, though not as impressive as any of my Pilot Iroshizuku inks (Asa Gao, Kon Peki, Tsuyu-Kusa and Yama Budo) coming out of my Pelikan M 800; I miss the smoothness and nib lubrication of the Iroshizuku inks. As always, the Goulet's service was impeccable: professional, timely service, excellent packaging, and with attention to detail.

Great ink, reviewed it in the past and nothing has changed. One of my personal favorites

One of my favorite inks is the Mont Blanc Royal Blue and this ink is similar in hue although it is a little lighter. somehow it seems that the pigment separated after leaving the ink in a pen for a few days in two separate pens. I am not sure if this is due to a contamination issue or what but the ink got lighter colored and more watery.

To my (amateur/inexperienced) eye, on the cheap paper at the office, the color looks very similar to Noodler's Luxury Blue but the Platinum blue has a slightly darker or more-violet color. It flows very well and seems well behaved even on the cheap paper. It is among the most water/bleach/ammonia-proof inks I've seen. I'd give it 5 stars if I didn't have to keep thinking about it being a pigment ink. It hasn't caused any clogging or any problems even with my typically-infrequent cleaning, but I have to think about it.