Explanations:

“Matt Robinson in collaboration with Tom Wrigglesworth embarked in an experiment of ink efficiency by sketching out large scale renditions of popular typefaces with ballpoint pens and comparing their ink usage. OK, they might have a little too much time on their hands, but their findings have a few surprises.”

You may already know about Mark and Tom’s work : they directed and edited this viral printer video for Hewlett Packard.