Here, everything is lights, smells and noises! The characteristics of an ancestral activity whose manufacturing techniques have hardly changed since the first third of the 19th century. Men with precise gestures and sober speech manipulate the incandescent cast iron in a well-regulated ballet. To enter the moulding workshop of the GHM Company in Sommevoire (Haute-Marne) is to change worlds, to share for a moment the demands of a harsh trade, to immerse oneself in a complex know-how and to love work well done.