Pilot Namiki IC100 Fountain Pen Ink Cartridges - Blue/Black (Pack of 2)

These flow smoothly, have a clear color, and last a good amount of time. I use them in a fountain pen that sees regular use. I have had no issues with leakage, and they fir as advertised. Excellent value, and easy to swap out when they run dry.

I love this color and will buy again! But it takes at least 15 seconds to dry on Hobonichi paper. Probably user error because I was testing it immediately after replacing.

These are a staple for my fountain pen collection. I love the color because it is not fully black, but a very very dark blue, giving a unique hue. These are so simple to use, just popping in and out if I do not feel like using the ink converter. The do tend to run out rather quickly depending on the nib size you use and without showing signs they are getting low, recommend having a backup with you.

This is my go-to workhorse ink for work. I’ve used a wide range of fountain pen inks from brands like Montblanc, Iroshizuku, J. Herbin, Waterman, and Noodler’s, and I keep coming back to Pilot Blue Black. It hits a really nice sweet spot when it comes to flow, permanence, and ease of maintenance—three things that matter a lot when you’re writing regularly in a professional setting. The color itself is a deep, dark blue that maintains a classic, understated look while still offering just enough richness to give your writing some character. It’s not flashy or whimsical, which makes it ideal for office use—especially in more conservative or traditional environments where a bright or unusual ink color might come off as unprofessional. In short, Pilot Blue Black is a perfect ink for anyone who needs something reliable, legible, and appropriate for formal work documents or notes. It has presence without drawing too much attention, and it performs consistently across different nibs and paper types. If you're looking for a professional, no-nonsense ink that still has a bit of personality, this is the one. Photo- PBB has a nice sheen to it, on Tomoe RIver paper. Cheers!

I adore my three Pilot Metropolitan fountain pens, and these are the only cartridges that fit them. It's irksome that Pilot made these pens unable to take the standard international cartridges, and these seem to last just a tad less long. Fortunately the ink in them is top notch, and they are easy to change. No leaking, good balance between 'wet' and 'dry'. I like this black/blue color, which seems to make the blue appear more sophisticated. Would buy again.

Great product, no leaking, ink last a decent amount of time per cartridge, color is good, it flows smoothly. The only thing is, I’m not sure if I will be using blue of black when I pop one in. They all look blue and there is no distinction on the cartridge. So if you like surprises…! They are great!!

They work absolutely perfect, the ink is good quality and fitted the pen I bought!

Great ink at an excellent price!

Product was delivered fast Was as described and works for pilot pens Color and flow is excellent

Livraison avant la date prévue mais erreur de couleur d'encre à la réception....vendeur très réactif, message traité dans l'heure un vendredi soir à 21h et relivraison du bon produit très rapide sans retour des mauvaises cartouches. Très commerçant et super réactif, je recommande.

Estos cartuchos sirven sólo para plumas de la marca Pilot. Yo los uso en una pluma modelo Vanishing Point, que me acompaña todo el día. Con ellos la pluma empieza a escribir de inmediato, el plumín no se seca. El color de la tinta me parece adecuado para todo tipo de notas o firmas.

Nice shade, good match to the Pilot pens. Nib is well "oiled" with this Pilot ink

Parfait pour ma plume