That title was meant to be a pun based on “fountain pens” it probably fails because I feel the need to introduce the rather amazing concept behind this post with a non-sequitur. I could try to redeem this lede with some sort of segue – but perhaps I should just get to the point (pun intended).
A couple of designers have conducted an elaborate plot to measure the ink use of popular fonts. They did it by writing the word “Sample” on a wall with ball point pens and then photographing the pens once it was done.
It turns out Garamond is the best – but I’m not sure they considered ecofont.