I bought a sample of this ink. It is a nice blue ink and writes smoothly. Will purchase again.

This is my first blue ink I've tried and I quite like it but it's not what I was expecting. It's a bit lighter than the very bottom of the ink sample picture. Being a beginner I can't say too much on how good it is compared to others but it certainly didn't give me any problems. I want something a tad bit darker but that's not a knock on this ink.

I thought this would be a dark blue, but it's so dark it's barely any different from black. Very glad I got the sample not a whole pack of cartridges.

This ink competes with Diamine Midnight among my ink samples.

This is a nice, well behaved Blue-Black. Probably won't buy it, as there are some better ones out there, but it still is a good ink.

This ink was fine, in terms of properties -- no issues at all. It is not a noteworthy color though. Just nothing particularly special.

At the moment I bought this, I was searching for the very colour of denim pants, and yes, this was the colour; a bit darker type, though.But now I prefer dark navy, midnight blue or blue black. After lots of mixing test, I?ve got to the golden ratio of the recipe: Diamine Denim 2 : Diamine Eclipse 1.618 : Diamine Midnight 1. Just try it. It really looks much more attractive than any other blue-black.

Yep, like an old pair of 501's you just want to keep coming back for me. A lovely blue with warmth, and dries in good time for this lefty.

I didn't think i cared much for blue (ok I like BSB) but other than that I hadn't found a blue I could be in a long term partnership with. Then I met Diamine Denim. This is my new go to blue. I use it daily. Very well behaved. Dark enough for good contrast with fine nibs.

This is the blue-black I've been looking for. Well-named, and dries much faster than a pair of jeans. Actually, it dries really, really fast.

Really like it! May become a go-to dark blue. Will buy again.

This is a really nice light/medium Denim shade. Lovely color. I have to add that I have really fallen in LOVE with this ink, it's the nicest flowing and I just LOVE this shade of blue. It is also fairly quick to dry. I WILL be ordering a full size bottle of this!!

This ink performs well, but I found myself wishing it was either a truer blue or simply black. It's so close to both that it really qualifies as neither. The saving grace is just how well-behaved it is. No feathering or bleed-through even on cheaper paper and the saturation is phenomenal. Kind of a perfectly well-behaved, bland, blue-black.

A very nice color and not too blue but sort of a dark smokey blue.

This is my absolutely favorite shade among the blue/blacks. Dries quickly, looks great on just about any type of paper you use. Perfect for any conservative or your journal. As always excellent experience with Goulet. Thanks so much. People let us not forget about Alex too! Thanks so much Alex for all your help in answering my questions as well :)

Have been sampling blues from Goulet this summer and found this and really like it - shades well from my Lamy 1.1 Vista and looks great on papers like the Rhodia dot paper - flows and behaves great and gives a nice shade of blue-black that can be used for most purposes - really like this ink!

This is a rather dark, understated blue. Its name fits, as it is not particularly vibrant. I need to use it more to get a feel for how it works on different papers. I tend to use more blue blues. As opposed to midnight blue, this color is kind of a drab, matte finish. Like denim.

After Noodler's 54th Massachusetts definitely one of my favorite dark/black blues. It looks a little washed out (as denim should be) and has some shading to it, but not a lot. You can compare it to Denim Blue-Black, which is slightly darker and more saturated. In any case one of my go to inks.

Wonderful dark blue/black, dries fairly quickly unless thick, not waterproof but resistant when fully dry.

I love this ink for several reasons. I was looking for a cool blue-black that was different but could stil be used at work. This is perfect because it is dark, like a midnight blue. It also dries quickly but has a rich wet line out of the nib. Lastly, it flows very well with both pens I've used it in- a converted Platinum Preppy medium and a Lamy Safari medium.

I've never been a blue fan before but when I tried the Diamine Denim that came in my Ink Drop samples I fell in loooove. Smooth flow. Saturated but not gaudy. Useful fir daily work. This is THE blue to have.

I am not a huge fan of blue or black ink and some blue-black combinations just don't cut it for me either. However, there are times when one of these colors is a must, such as signing a formal letter or business document. Diamine Denim is great for me and its name is a perfect descriptor. If you have ever seen Levi's dark blue shrink-to-fit 501 jeans before they have been washed then you will have a good idea of the color. This ink is dignified and can be used wherever a formal blue, black, or blue-black ink is called for. I find it a well behaved ink and it does an excellent job with an extra fine nib. I do find it a bit too wet in my Ahab Flex, but that is to be expected, given the nature of the nib in that pen.All in all, this ink is a winner. As soon as I got the sample and used it, I went back on line and ordered a full bottle from the Goulets.

This is growing to be my second favorite ink after Diamine Majestic Blue. The color isn't perfection like the Majestic, but it is a nice shade with one outstanding property I have discovered:On occasion, thoughtless waitstaff will bring me my credit card receipt on that terrible thermal paper with no ballpoint pen. When that happens, I sign with my fountain pen and let them deal with the mess. I feel a bit guilty, but I'm just doing the best I can. I don't have to feel guilty when using a pen with Diamine Denim because it is the only ink I have ever found that will dry on that paper in a reasonable amount of time. I write with broad nib pens, and it goes and stays right on that thermal type paper. It is exceptionally impressive to me, and that is why it will likely be a permanent fixture in my favorite pen (the Majestic goes in my second favorite pen).

For my review of Diamine Denim please look at the color under ink samples. The fact that the day the sample arrived and I tried it out and then immediately ordered a full bottle should easily explain the 5-star rating.

I use dip pen in ink followed by watercolor washes to paint musicians during the Blues Jam held Monday nights at the Grisly Pear in NYC. I had just received a sample of the Diamine Denim ink and brought it with me to test. I like the richness of its dark tone as well as the color when diluted with water. I was exceptionally pleased with the way it bled into the watercolor when a stroke of paint met with wet ink. Unlike many blues, I can achieve a full range of values, from an almost black to a mere tint when using it with brush and water. I'm not usually a fan of blue inks, but this one is a winner.