As an independent journalist Buache wrote the "Cinema" column for the Nouvelle Revue de Lausanne between 1952 and 1959, and from 1959 for the Tribune de Lausanne which later became Le Matin. His continuing contacts with the founders of the Cinémathèque Française, Henri Langlois and the film director Georges Franju, resulted in an equivalent Swiss institution: Buache was one of the ten co-founders in 1950 of the Swiss Film Archive (fr:Cinémathèque Suisse), a foundation for the conservation and study of films and cinematography. He was the director from 1951 to 1996 and afterwards the president of its council. His successor was Hervé Dumont, who inherited some 65,000 copies of films amassed during Buache's time as director.
