Ellington Pens 24 Black Fountain Pen Ink Refills - 24 Pack International Standard Size Cartridges - Ink for Fountain Pens - Premium Quality & Non-Toxic, Long-Lasting & Waterproof, Dries Quickly

ink is nice and smooth as well as the pen - dries quickly - ink color is true in black/blue

Came promptly. Wors well after I soaked the pen head in water for 24 hours.

Wonderful colors and high quality ink!

I have a cheap fountain pen that didn’t flow well until I started using these cartridges. Now I love using that pen for everyday writing. The flow is just fine. Easy to change cartridges and priced right. Color is deep. Dries fairly quick. I’m making it my go to for all my pens.

Yes and no. I bought these for my Diplomat Magnum fountain pen, and they do not fit. If I put one cartridge in, it doesn't seat correctly and falls out. If I put another cartridge on top of the unseated one then it holds everything in place, but the tip doesn't screw all the way back on and it's uncomfortable to hold. Having said that, the blue color is one of my favorite colors that I've tried so far. It's really dark like writing in black, but with a blue tint and it's exactly what I want for notes and journaling.

This is absolutely not waterproof ink. It reactivates instantly with water so it doesn't work with watercolor except as a final, final layer and it smudges with your hand if you leave it on the page for too long. It doesn't fit into my fountain pen smoothly and is quite loose, but my pen keeps it secure so that hasn't been a problem except when I open it to check the level. Other than that, it's decent ink.

Fits perfectly, looks lovely. Dries out a wee bit fast. But well worth it.

Beautiful Weighted Refillable Fountain Pen