After the second world war, Sonia was a board member of the Salon des Réalités Nouvelles for several years. Sonia and her son Charles in 1964 donated 114 works by Sonia and Robert to the Musée National d'Art Moderne. Alberto Magnelli told her "she and Braque were the only living painters to have been shown at the Louvre". In 1966 she published "Rythmes-Couleurs" (colour-rhythms), with 11 of her gouaches reproduced as pochoirs and texts by Jacques Damase, and in 1969 "Robes poèmes" (poem-dresses), also with texts by Jacques Damase containing 27 pochoirs. For Matra, she decorated a Matra 530. In 1975 Sonia was named an officer of the French Legion of Honor. From 1976 she developed a range of textiles, tableware and jewellery with French company Artcurial, inspired by her work from the 1920s. Her autobiography, "Nous irons jusqu'au soleil" ("We shall go up to the sun") was published in 1978.