Love this Shade of Blue!

This is one of the most beautiful colors!

Similar to Diamine Steel Blue ink.

Brighter than I expected but very very pretty, works well in my pilot kakuno, I see myself getting a full bottle of this.

Found this ink from one of Brian's many YouTube videos and I had to give it a try. When I first swabbed it, I wasn't terribly impressed. I believe that's due to the rather absorbent paper I have been using for swabs. Once I inked this up in my TWSBI 1.1 mm stub and wrote on my Rhodia tablet, I fell in love. Much more shading than I got from the swab and a more green hue

I bought this sample with my first purchase of fountain pens and inks... what a lovely introduction! This ink is a beautiful colour - a blue with a touch of green that isn't overbearing to look at when used for long writing samples. The shading is stunning. Absolutely going to buy a bottle once I get through all the samples I have!

I absolutely LOVE the color of this ink, it's GoRGeOUS!!! It's the perfect turquoise color that I was looking for to ink up my new Turquoise TWSBI!!

A very vibrant and saturated color which seems to jump off the page! I have been searching for a light blue ink to represent water in architectural sketches. Diamine Marine is more of a greenish teal, whereas Noodler's Navajo Turquoise and Lamy Turquoise lean more towards blue. Try it out--you won't regret it!

Got this as an ink sample. Excellent product

I love the colour but I don't find it worthwhile to purchase a fountain pen ink that dissolves completely in water. I may end up using Diamine Marine as watercolour instead because it hooks me no matter how many times I look at it.

I really like this color. Purchased sample but this is a color I will buy a bottle of. No feathering, dries fast, etc.... I am using it in my TWSBI 700Vac with a stub nib and it looks very nice on the page and in the clear pen. I also have a Pilot Metropolitan in teal and that is probably the pen I will keep this ink in most of the time. Highly suggest this color if you are looking for a nice teal color. Note: I rated the waterproof in the middle because I don't know how waterproof it is... I didn't try that out. Sorry.

Perfect blue turquoise... with a slight of shading. Love it even I search for more shadows but great color and maybe plan to purchase in full size.

This color is beautiful, very vibrant and saturated. It does feather on cheap paper though.

This is a lovely ink that I've been using to take notes in a book. Even on relatively cheap paper (as in a paperback) the ink behaves beautifully. I could see using this to correct papers as it stands out but isn't too light to read easily. The color is just beautiful; rich turquoise blue/green. The ink dries very quickly--almost immediately--and seems to have excellent water resistance. I'll definitely be getting a bottle of this when the sample runs out.

Excellent bright color...easy to read but stands out

Like this color a lot as it reminds me of carribean waters; it flows great withPreppy fine nib, and even better with a Sheaffer 100 medium nib;

First, the chemistry: Flows well in several pens. I write almost exclusively with italic nibs & this ink shades beautifully. I'm reporting that after using it on Clairfontaine and the Rhodia Webnotebook. No feathering or bleed through on either of them.Second, the aesthetics: I'm not sure I like this incredible color. I can't book a trip to Micronesia or the Caribbean and when I use it that's all I can think of. It's stunning. I've had too many what Scheaffer used to call Peacock Blue. This is a bit more green than the majority of turquoise inks. I really can't liken the color to anything other ink color. Marine is an apt name as it is like one of the colors in tropical oceans (Very close to the swab as my monitor shows it - as usual, kudos to Brian and his staff.) I'd never use it for any business purpose tho'. I hear that Polynesians have one hundred or more words for blue. Sad that English is so limited. This color would surely have a unique word for it.

I felt this ink would be too light for daily use upon first inking up with it, and even said as much in my ink journal. But, I was wrong. The more I used it the more it grew on me - it isn't a very dark color, but it shades beautifully and is gorgeous on paper out of an italic nib. I have a LOT of samples but just a few bottles - this is about to be added to the bottle collection.

I am a blue-green ink enthusiast, so I decided to add Diamine Marine to my (quite large) ink palette. It is a very nice relatively light blue-green, with a very nice shade, depending on the wetness of your pen. It is actually very similar to Diamine Steel Blue, but a little bit darker and leaving a darker shade. Also similar to Private Reserve Blue Suede, but lighter; in the same range of blue-green though. As most Diamine inks it dries reasonably fast and does not produce feathering. With the right paper It is a real nice ink for notes and general writing purposes. I use it also for correcting and grading papers, which gives a very attractive highlight to the corrections in papers that are generally written with dark inks.

Right away, this was my favorite sample from the April Ink Drop and I was in suspense waiting to find out what it was. I love the brilliance of the color and the subtle shading, and it flows well in all of the pens I've tried so far. Normally I am not a fan of blue inks, but this one is more on the aqua or teal side and it reminds me of a summer ocean breeze. Or the sea glass one might find on the beach. Lovely.

I had a new pen and, of course, I wanted a new ink to go with it. It's hard to choose sometimes because you never know what the actual ink will look like compared to what you see on your monitor. Fortunately, I was going through some old bills and found one of Brian's handwritten thank you notes written in this color. Beautiful looking, easy writing - everything you'd want in an ink!

I love this ink. So dark that it can be used where black or blue black would be, but much more interesting. Has turquoise depths like a moonlit sea. Some lovely shading with a flex nib. Very well-behaved.

We test with both a glass pen and an italic plumix so we have both a wet representation and a drier one. It looks like the color a kid would pick to draw tropical water. It's a greenish-blue with no shading. It's a little darker in the wet writer, but that's to be expected.

I find the ink is less smooth with some bleeding on a bond paper than some other brands I've used.