Pilot Namiki Fountain Pen Ink Cartridge - Blue Black - Set of 12

Not really what I'd call blue-black, more like a weak bluey-grey. I was hoping for a much bolder colour, similar to the Pilot/Namiki black with a little blue shading. Unfortunately, I couldn't find a decent review for this specific shade prior to trying it.

The ink seems to transfer itself to the paper in all the right ways, with no particular penchant for feathering, bleed through, drying out or any other bad habits. Maybe it helps to only be used with Pilot nibs, an obvious benefit of proprietary cartridges.

However, I won't be buying these again as I'm just not a fan of the colour. Fortunately I've a number of Pilot pens around the house, so maybe I can get someone else to use the rest of these cartridges...