Between 1958 and 1960 Piero Manzoni soaked lengths of raw canvas in kaolin white clay and let them air-dry into folds, wrinkles and pleats. He named them Achromes — "colourless" rather than white — a matte, chalky, porcelain-cool off-white whose low relief throws neutral-grey shadows under raking light. Hung against a mid-grey wall, the work is an experiment in absence, not a painting of white. This system carries that stillness into interface: a neutral mid-grey ground so the relief and its shadows can read, a chalky kaolin off-white for every surface, and shadows kept strictly neutral and cool — never warm, never glossy. It is colour withdrawn to the edge of nothing.