Cromofonemi, 1967

edition by the authors, without indication of the printer; editorial folder in a white paper, title printed on the plate, artist's book made up of 7 sheets of tissue paper with coloured vertical stripes on which the phonemes "e" - "è" - "se" is printed, the overlapping of which can determine a series structured as follows: "e" (yellow) - "è" (red) - "se" (blue) - "è e" (orange) - "e se" (green) - "se è" (purple) - "e " (yellow).