Biologement

Matériaux Écologiques Provence keeps a shop at La Destrousse, in the hills behind Marseille: natural paints, lime and clay plasters, cork, solid wood floors — and a béton ciré kit range in some fifty shades, from about twenty euros the square metre.

Each shade is its own product, photographed as it is actually trowelled, and sold by area: 2 to 32 m². The house also runs courses in lime and clay, which says a good deal about who it is for.