Metal nib, green ink. Ink spreads nicely in the paper for this purpose, I think.
Today, I experimented with some calligraphy/drawing ink I have, plus some gum arabic, and the same pens I’ve been using. Note to self: pen over gum arabic doesn’t work well. Still, I think it turned out rather well.
Been busy all day, what with grocery shopping, the girl’s soccer, and gaming with friends. Finally sat down with pen and paper. In this case, a Uniball Signo. And the image I found on Twitter, linked from Tumblr (and because of the way iOS apps don’t always play well with others, I can’t even figure out whose Tumblr it was shared from, as if I click the “visit” link on Pinterest, I get the “please sign in” page for Tumblr, even though I’m signed in on the app; I’ll try to track down the original tomorrow — EDIT: Original is from http://absinthius.tumblr.com/post/38389336640/octopus).
This is based on a picture I took at Animal Ark last year. My proportions are all off, and I really should have done a pencil underdrawing to try to position the spots better. And maybe at some point this month, I’ll figure out how to use the different pen widths.