If the horizontal "signals" of Yves Gaucher's Grey on Grey paintings reinforce the paintings' dynamic suggestion of sounds in space, the occasional slight diagonal divisions of the colour areas of later paintings like "Yos/Ps m89" lend the compositions a sense of veil-like movement. Created close together in time, the Inversions and "Phases" prints mark Gaucher's commitment to the use of the diagonal as a compositional device. In the "Inversions", Gaucher uses the plate mark to define tthe solid, symmetrical forms. It is as if a triangle, the dominant form of his earlier series of works "Jericho", were truncated by the superposition of a rectangle. In the "Phases", the diagonal lines are varied by slight changes in their angles and positions. The lines both define the pictorial spaces and function as active elements comparable to the "signals".