[1] In the period after World War II (1939–1945) there was increased interest in using new methods and materials for mass production of furniture.

Manufacturers of materials such as formica, plywood, aluminum, and steel sponsored the salons of the Société des artistes décorateurs.

Designers who exhibited their experimental work at the salons in this period included Guariche, René-Jean Caillette, Joseph-André Motte, Jean Prouvé, Charlotte Perriand, Antoine Philippon and Jacqueline Lecoq.

Using metal tubes and wood he created furniture for the different rooms in a dwelling, including tables, chairs and modular storage units.

[1] He was looking for a modern, straightforward and economical alternative to the opulence of traditional French designs and the hard chic of the prewar modernists.

[3] In 1954 Guariche formed an association called the Atelier de Recherche Plastique (ARP: Plastic Research Workshop) with Michel Mortier and Joseph-André Motte, whom he had met in the Gascoin studio.

He helped with the design of a station in the winter sports resort La Plagne and the interior of the Firminy hospital.