Poster Design##Ralph Schraivogel: "The craftsman" contract by Felix Studinka##Swiss designer Ralph Schraivogel signs "a craftsman contract" in poster design, reinventing the canvas into a new medium. Searching inspiration in Bach, jazz improv and M.C. Escher, his "hand made" imagery is built on the dialectical play between free and restricted elements, typographic form, and the texture of photography.