60 ml Ink Bottle; Infinity Violet (with ECO Formula)

I bought a custom made fountain pen and this the ink he recommended.

All the "Infinity" line inks resist drying out, but also absorb quickly into paper so they're considered fast-drying. This makes this ink very useful for a general purpose ink, especially for pens (e.g. in the office) that I might only use occasionally. The trade-off is that quickly absorbed inks tend to feather more.I use this ink in pens like the Moonman A1 (or Pilot Vanishing Point) that are clickable instead of using a cap, and so they don't seal around the nib as well as a cap for preventing dry-out. This ink keeps those pens usable long after the pens would've dried out with other inks. The flow is good, and because of its properties, I originally intended to use this ink whenever I'm testing/troubleshooting a pen that's misbehaving. But I find that i like it so much that I use it as a general-purpose ink.It's a decent black, whereas some other inks can be lighter/greyer. The bottle has a wide mouth, so it's easy to refill any pen. (Some other brands have narrow necks that make refilling difficult for bigger pens.) It's very easy to clean. The trade-off is that this is not a waterproof ink at all.

I am so happy to receive the free shipping at a good price. Of course, I am even more satisfied because it is good quality.

It doesn't dry out in pens. I have found that it has bled through most paper. Great price!

This light blue ink is not too lurid. I got it for a retractable fountain pen -- Moon Man/Majohn A2, a Pilot Vanishing Point homage. My previous ink jammed up badly. The Infinity ink should resist drying out, and so far it has.Be careful: The jar is full up, and a little ink seeped out under the cellophane seal. I got ink all over my fingers, but it washed off easily.

This fountain pen ink is just what I needed. It allows me to leave my pen uncapped during a meeting, without the nib drying out. I gave it a test in a TWSBI Eco-T with a 1.1 km stub nib, after writing a short sentence, I left the uncapped pen lay on a desk for 3.5 hours before I picked it up and wrote with it again. The pen wrote without a hard start or any other problems. But to make it even better, I did not experience any extended ink dry times; when writing in a Black and Red notebook, the ink dry times were between 10 and 20 seconds.

This ink dried on the nib, requiring very difficult hard restarts, after five minutes of being held, nib down or horizontally using a TWSBI Diamond 580 ALR EF (extra fine).Unexpectedly, this is the same duration after which this pen and nib combination dried to a quick restart using the following inks:Jacques Herbin Emeraude de Chivor,Platinum Carbon, andNoodler's Black Waterproof.Most unexpectedly: the pen-nib combination was harder to restart using the Private Reserve Infinity ink was harder to restart than when using any of the other tested inks.Six tests were conducted both at an office desk (68°F, 36% measured relative humidity) and six tests were conducted in a college classroom (70°F, estimated 40% relative humidity). These tests of the Private Reserve Infinity ink yielded a dry nib in a mean of five minutes, and a much more difficult restart, compared to the other tested inks.There was no discernible slowing of nib drying when using the Private Reserve Infinity ink after more than a dozen tests.Note: this pen and nib combination remains wet when capped with all of the four tested inks, but dried on the nib when held open and not in use. No railroading or skipping was detected with the pen-ink combination and any of the four inks when used for cursive writing or sketching.

I got this to use in my Monteverde Tool pen. For some reason that pen is prone to nib drying and the included Monteverde Black just isn't all that good an ink for that pen. But with PR Infinity Black there is no problem with hard starting and the nib does resist drying. And as a black ink it is darker, less grey looking when dry than the ink the pen comes with. Note that the Tool has a very fine nib so it is going to be prone to drying and starting problems.