Platinum Fountain Pen Dye-Based Ink Cartridge - Blue Black - Pack of 10 4 Set

This ink has a nice hue to it which is much bluer than most Blue Black fountain pen ink.

On standard cheap paper the color is dull. It’s more of a blue gray than a blue black. I was definitely thinking it would be dark, but it’s not. It also seems to be dryer than the black cartridges. I constantly have hard starts. I would recommend you get the standard black cartridges for daily use.