Outus 120 Pcs 3.4 mm Fountain Pen Ink Cartridges Fountain Pen Refills

It's not spectacular ... but for a general daily-use black ink, it actually writes well. I was not expecting much ... I actually bought b/c this was the cheapest way I could get a few cartridges to refill will a syringe (empty cartridges hold so much more than the little twist-to-suck-up converters). I tend to use decent but not exquisite ink - Cross, Lamy, Pelican, Parker, Pilot, etc. I use similar pens - decent but not $$$ - parker, pilot, cross, ... this ink is for a HongDiang (F nib) which came with a converter but no cartridge.To my surprise, this ink writes better than I expected. It is fairly bold and smooth and it dries relatively quickly and doesn't smudge when used in the HonDiang with a F nib. I'm curious how it will do in one with an EF nib, but I've not tried that ...yet. It seems to flow fairly well and I've had neither clogs or skipping. It may have just the slightest amount more drag than some blue-black ink I had tried the pen out with, but that ink is not nearly so bold/dark and almost has a slight translucence and water-y look as it lays down. So, yeah, this isn't bad stuff!! Instead of using a couple to get the cartridges and leaving the rest in a drawer like I expected, I'll probably just use these for a while in the couple pens I have that take THIS size cartridge. The cartridges snapped into my pen with exactly the amount of force I am used to the dozen or two fountain pens I have - no excessive force at all. It sealed very well and after week or so of storing the pen lying flat or tip-down between uses (Don't judge me ... I wanted to check for leaks), I've had no leaks or bleeds whatsoever.>>> DO <<< make sure you are matching the cartridge to your pen!!!!!!I saw some reviews saying it leaked badly, but reading those closely, I wonder if some dear folks don't realize you MUST match the cartridge to your pen exactly. While there are a few "standards," there are many, many such different "standards" and fountain pens cartridges are ANYTHING but one-size-fits-most ... so please, please, PLEASE, do yourself a favor and do get the CORRECT cartridge for your pen. This is nice DARK, BOLD, black ink so of course, if it doesn't fit correctly into your pen and thus leaks, you are going to have a mess that will likely be VERY difficult to clean up!!! Please don't put yourself through that!!

There is no getting around the fact that these are a bargain! 120 cartridges that fit nicely in Hongdian pens (3.4mm bore ) ...no messing with ink stores while traveling! I picked these up because I've spilled ink on my desk at work twice now ...(btw, hand sanitizer and window cleaner are great for cleaning ink messes.)So I've been trying it out by sketching with a fountain pen (EF nib). The ink flows smoothly and has no trouble producing both thin and thick lines. It is not completely waterproof...you can see in the posted images, the shading on the rabbits is done with both hatching and a generous amount of water from a water pen. The ink does not loose enough of its color to water to produce dark shading on it's own, but it does shed a very light bluish grey tone - something to keep in mind if you were hoping to use watercolor over the top. But the lines remain nicely sharp. It's kind of a nice effect for adding a touch of shadow to sketching.

These are a perfect fit for my husband's Zebra V-301 fountain pen. He is very pleased with the ink. There is no bleed-through on standard printer paper. Also, the ink dries very quickly. We were able to get 120 refill cartridges for the about the price of 2 Zebra-brand refills!

Leaks out on everything. Falls out of the pen. Good value when it works and doesn’t leak.

I am half way through my second order of these cartridges. I write a lot and have used 150 of these cartridges in the two and a half years I have been using a fountain pen. These are NOT for standard American fountain pens. These cartridges are for 3.4 mm diameter socket fountain pens which is a much larger diameter than the American standard fountain pens. If you try to use them in an American standard pen they will not seal and the ink will leak everywhere. I have used 150 of them and never had a leak but my pen is from an international maker and has the 3.4mm socket.

I think this is an extremely good deal but I believe somewhere in the title it said “universal” and it didn’t fit on my pen it was actually too big. I had to buy a completely new pen just to get my money’s worth

BE WARNED!!! This ink sucks with normal printer paper and notebook paper! IT WILL BLEED THROUGH THE PAPER! Quality is not that good it is very watery. I suggest using very thick paper for this ink.

I’m very happy with this pen refill! It’s slightly longer than the original one, but the interface size matches perfectly, so it fits my pen without any issues. The ink flows smoothly, providing a consistent and enjoyable writing experience.