I did the first three of these (baseball size) sketch cards as a donation for a local comic book store's celebration of "Free Comic Book Day." From left to right: Hellboy, Chun Li, Wonder Woman, and Manji (From Hiroaki Samura's "Blade of the Immortal"). I used a regular #2 HB pencil, 2mm HB Staedtler Mars technico, a black Verithin, and white gouache. Here are some cards Vinod Rams did for the same event. I'm diggin' on his Hellboy, Abe Sapien, and Kusanagi (from "Ghost in the Shell").
I took a liking to the little bristol card format so I promptly went out and bought myself a pack of them (with the accompanying clear plastic slip cases). Hence the Manji sketch. According to the guy at the art store these "artist trading cards" are all the rage for people to sketch and trade. Now if I could only coerce Hiroaki Samura to trade cards. :)
Hellboy is © 2009 Mike Mignola.
Chun Li is © 2009 CAPCOM CO., LTD.
Wonder Woman is © 2009 DC COMICS.
Manji is © 2009 Hiroaki Samura.