The Centre Technique de Matériaux Naturels de Construction (Tile and Brick Technical Centre) was founded in 1958 for the technical advancement of clay construction materials. This activity is centred primarily on the technical issues of clay products and conditions for their use and regulation. CTMNC 200 avenue du Général de Gaulle 92 140 CLAMART Tél : 01 45 37 77 77 Fax : 01 45 37 77 97 Mail : ctmnc@ctmnc.fr