Interval Press (the silkscreen design co-op I belong to) had an art show where each of us based on an album of our choice from Radiohead. I selected In Rainbows (my favorite album of theirs), and did a poster inspired from a specific song. Each poster was silk-screened on black 80# French paper, and there was a lot of trial and error seeing what colors held on the black paper and what soaked in.
Added bonus: I used silver ink and used every color of the rainbow in one of each of the four posters.