Faber-Castell Carbon Black fountain pen cartridges
I don't usually like black ink much; it's rarely a true, deep black. But after reading a few reviews of F-C's Carbon Black, I decided to order a 6-pack of the cartridges with the new Faber-Castell Hexo fountain pen. I've had them for about a week now, and it's a great combination. The ink flows wonderfully from the Hexo's nib (I got a medium nib) and it is truly black—a rich, dark, deep black. Seep-through is minimal to none, depending on the paper I write on, which is a big plus. I definitely will be ordering more of these!