Jacques Herbin Bleu Des Profondeurs - Ink Sample

This color looked way darker and more saturated online

Well behaved ink

This is the perfect blue to black ink for work. It is a little wet but that's fine in the right pen. It dries quickly enough that dragging my left hand through what I just wrote doesn't smudge on any of the note pads I've used (cheap work supplied stuff).

A far more complex...

...blue than I was expecting, and I very much enjoyed the ink test.