Vibrant color and right intensity.

Great blue for every day is you like a deep blue that is clearly blue. Using it in Viscinti starry night with a medium nib.

I was looking for a bright blue that tended more to purple than green. This is the one! I love this color - it goes on definitely purple, but dries to a bright blue. This is my current favorite (well, along with Ancient Copper).

I came across your videos via youtube and was introduced you the world of fountain pens again. this ink is beautiful. it is quite vibrant. dries pretty quickly as well. I am a beginner and I have used this on normal paper only.

This is a fine ink, but darker than Edelstein or J. Herbin sapphire blues. Wish someone would make an ink that pops like Noodler's Bay State Blue, but without the staining/cleaning issues.

I like the rich sapphire blue of this ink a bit more than I do the Pelikan Edelstein sapphire.

A good bright blue with a slight purple tinge. Quite an ordinary blue ink. Fast drying with no bleeding.

Beautiful color. Very similar to Herbin Eclat de Saphir, but much more reasonably priced.

A really beautiful true blue. It flows really well in the Noodler's Creaper Flex pen I'm using it in currently.

I just inked up my Dostoevsky (M) with the Sapphire Blue, to match the faux stone in the clip. This ink didn't disappoint. The ink defies a strong definition - it dances between a blue and a purple, depending on the light. It shades quite well with the thick line that this pen lays down. I also inked up a Pilot Plumix with it (modified to eyedropper) and the cursive line that this pen lays down leaves the ink leaning toward a purple. It almost reminds you of the blue of your highbeam light in your car. One of my favorite colors.

This is a fun blue. Lays down a little purple, but dries pretty close to a true, though vibrant, blue. The dry time is seriously quick: ~ 4 to 5 seconds on Rhodia and Clairefontaine. I use this for furious note taking at conferences and lectures, and haven't had an issue with bleed through, smudging, or blue hands.

Just tried this in my Pelikan M405 and seems to be a well behaved ink. To my eye, it goes down on paper and looks very much like a more saturated version of Herbin's Eclat de Saphir. Very purple when the ink first touches paper, but it does tend to dry to a more blueish tone. If it continues to satisfy, I may get a bottle of this.

Has a small hint of purple (when wet) and initially looks darker then dries a little lighter. 10/23/12 Edited: After some use my tastes have drifted away from this blue. I find myself liking a more pure blue or a blue-black. This ink has too much of a hint of purple in it.

I own a lot of ink. It occupies a shelf in a built-in bookcase in my office. I have tried many brands, but my favorite is Diamine. The reason for this is simple: the blues. I can think of no other ink maker that features as many quality blue shades as Diamine does. I don't own all of them, but I own so many I feel I have the blue spectrum pretty much covered.My favorite is Majestic Blue, which is a vibrant deep blue. Perhaps the most unusual blue is China Blue, which corresponds well with what any sports fan might call Carolina blue. Sapphire Blue is a long-time favorite of many and writes with a purplish hue before drying to a true blue.

As mentioned by the other reviewers this is definitely a color-shifting in. It goes down surprisingly purple for a blue ink. However, over time, it turns its named Sapphire blue color. It has become one of my favorite colors. Nicely behaved. A tiny bit of bleed-thru and feathering on cheap paper. Only a little shading. But, unlike some of the Diamine inks, it dries fast, which is important for Lefties.