Blue inks usually bore me - they're either too light and remind me of a cheap ballpoint pen or they're too dark and might as well be black. But Sargasso Sea is a rich dark blue with just enough purple tones that it looks special. This one will always be inked, especially for those times when I need something that passes for a "conventional ink" but rewards you if you look just a little bit longer.

A nice deep blue.

I love the deep dark Rich color of Sargasso sea

My favorite go-to blue. Love the color. Wet ink and works well in my pens. Slow dry time so be careful with your hands, arms, etc. keeps the blue intensity from wet to dry.

The color is gorgeous and solid. Very wet ink...was a little too wet for my flex nib, but will work very smooth on one of my scratchier nibs. Looking forward to using it all!

I recently overhauled my MB149 and cleaned up other too-long unused fountain pens, and experimented with Goulet ink samples, looking for a Blue ink (not blue/black) with character yet not too much personality for professional use.Diamine Sargasso Sea is perfect. It flows well in my MB149 and Pelikan 200, dries fast enough to avoid smearing in everyday use, and gives me a dark blue with presence. Thank you Goulet for excellent service, fair prices, and fast shipment!

What a surprising ink this is! I bought it because I liked the color and Diamine has always been a good ink in all of my pens. I wasn't expecting the red sheen that appeared so that was a huge bonus! I've not had any issues with skipping or nib creep. I've only used it in two of my pens, my Lamy LX broad and a Pilot Metro 1.0 stub, and it's behaved well in both. I've used it on Tomoe River, Rhodia and Apica with no bleed through or feather issues. However, if you're looking for a fast drying ink, this isn't it. Otherwise, it's a fantastic blue.

Beautiful, vibrant color. Used with a glass dip and a Vulcan's Coral Noodlers Flex, was lovely both times. No issues with either. I am definitely please with this purchase.

The color was lovely, but the odor was like a swimming pool; enough to be distracting. The ink itself also has a lot of dye, which is a negative when flushing a pen; it requires a lot more water for a clean flush.

Wanted a deep blue ink which writes well on crappier paper. This ink definitely delivered. Feathers quite a bit on school notebook paper but writes fairly well on 20 lb copier paper and excellent on HP Premiun Laser paper. This is a wet ink and flows nicely in my TWSBI Eco.

GORGEOUS blue ink! A deep and rich color even after drying. I will definitely purchase this brand again.

Got this ink after a suggestion from a customer care representative suggested it would match the matte blue vanishing point well! Boy was she right!!! Love the wetness and how it matches the pen great! Not normally one to match ink to the pen but I just couldn't resist with this ink!!!

Bought this as a sample to try. Excellent color. Wet. Long dry time. Had continual starting and skipping issues. VERY hard to clean. Using in new Visconti Magma Manhattan Ltd Pen with Fine Nib. Cleaned the pen, used a lot of Goblet Flush, reloaded with same ink. Same problem. Perhaps it will work better in other pens but I'll pass this one by.

This ink is a beautiful deep vibrant blue in the first pen I tried it in, a stub nib, very similar to one of my favorites, DC Supershow Blue. Today I inked another pen, a German F nib, with it and the ink appears much darker, and strangely at the same time, almost in your face in sunlight. The first pen has been a dry writer, so I think that's why the beautiful blue color came through so well. The second pen is a fairly wet writer. The ink performed flawlessly in both, as is my usual experience with Diamine inks. No skips, hard starts, feathering, etc. Dry time was a few seconds. I've not seen any sheen so far. I have a Lamy Safari B nib pen that hates every ink (makes them all look dull and washed out) and never gets used. I tried S.S. in it today, and got a nice medium-dark blue! So, Sargasso Sea seems to be perfect in dry writers. It would also probably be great in an XF or F nib because of the saturated color. In wet writers it's darker and rich. The pens have cleaned up well with no permanent staining. This ink is clingy, though. Usually I just wipe the section with a dry paper towel after filling, but that leaves blue residue with this ink. Fortunately it wipes off easily and completely with a wet paper towel. I'm giving it 5 stars for its smooth writing and the stunning blue color.

It exhibits such a dark, rich colour in my Pilot Metropolitan F, and sheens in every centimeter. I've actually had a much quicker drying time compared to most others, and it's a fairly behaved ink, especially for its saturation. It leans more toward the purples and when diluted with water, turns into a very vibrant blue. too beautiful not to use in your everyday carry! I'm in love! This definitely deserves a better overall rating.

Amazing color! I have more blue inks than I know what to do with, and this is one of my favorites in terms of color. The only problem I have is that it dries in the pen. The day or two after filling it, it will dry and I have to take several strokes to get it going again. It isn't very practical as my everyday ink but I still really enjoy the color.

Bought the smaller size, but a really great blue ink for everyday use..

Rich color, easy to use

I have used up the sample, then the 30 ml bottle and am working on the large bottle! This is a well saturated, good performing ink. I generally use a 1.1 stub nib, and there is not tremendous shading. This is a fairly wet ink. However, the intense color just pops off the page! I've had no problems with any pen filled with it. If you really want shading, perhaps a narrower nib, or adjusting the feed so it isn't so wet, would work for you. If you are looking for a good, solid ink, suitable for business or casual use, this is it.

I love this blue. It is a dark blue that is suitable both business and personal use. The red sheen is outstanding and gives a wonderful presence to the ink. I have two pens always inked with Sargasso Sea, both Pelikans, and normally use this ink on good paper.

This is a great dark blue ink - but not, at least in my opinion, a blue-black. It's rich, dense and definitely a blue. Currently in a Pilot Falcon, but will feature in rotation in my other pens. Like all the Diamine inks I have it has good color saturation and goes down really well and with a very clean line on Rhodia and Clairefontaine papers, as I would expect.

So Much ink flow and leave blotches on the letters, especially the highly visible on the flex pen

Diamine inks are some of my favorites. I wanted a rich, dark blue that could work for any correspondence - work, school, or other. This definitely is it!

Sargasso Sea blue has more blue than any of Iroshizuku or Noodler's blue. The down side is that the pen tends to be little dry.

A beautiful ink with good shading and GREAT sheen.

While not waterproof, this Diamine ink does everything perfect from flow, to glide, to drying. A dense blue with little to no shading it works for all business and social requirements.

This is a rich not washed out blue when I write with it in my Lamy Studio pen.

This is a n amazing deep dark blue. It looks blue, not purple like most dark blues. Goulet's service never fails to amaze.

Sargasso Sea is a dark true blue with no hint of purple. Smooth flowing, saturated -- holds up well in all nib sizes, even EF. A true blue that's unmistakably blue.

I sampled 7 different dark blues before picking this color and found it to really make a statement if you want a rich dark blue that looks great against quality white paper or note cards.

I've used Private Reserve Midnight Blues for many years (and still will). But when I sampled Sargasso Sea I found a really dark blue that writes wet and is clearly blue on the page. You don't have to move it around to see if it's black or blue or something in between. It's just a step back from PR Midnight Blues and that is exactly what I've been looking for. It's regal, flows lusciously, and has a distinct character. I'll be using this in my new Eddy Beaumont with a 1.1 stub for a long time to come.