I really (really) like the Bic Velocity Bold. At 1.6mm, they certainly lay down some ink and are incredibly smooth. They are my favorite, by far. The 1.0mm is g

I really (really) like the Bic Velocity Bold. At 1.6mm, they certainly lay down some ink and are incredibly smooth. They are my favorite, by far. The 1.0mm is good, too, but the 1.6mm is great. https://us.bic.com/en_us/bic-velocity-bold-retractable-ball-pen-black-4-pack.html https://us.bic.com/en_us/bic-velocity-bold-retractable-ball-... The Uniball Signo (gel) is notable for its ability to write well on a lot of different surfaces. I use them for line work when painting rocks.