In 1928 she designed three chairs from Corbusier's principles that the chair was a "machine for sitting," and that each of the three would accommodate different positions for different tasks. At Corbusier's request, a chair was made for conversation: the B301 sling back chair; another for relaxation: the LC2 Grand Comfort chair; and the last for sleeping: the B306 chaise longue. The chairs had tubular steel frames. In the prototype models, the steel was painted; in production the steel tubes were nickel- or chromium-plated.