Thermal treatment

  • Traitement thermique | Métier horloger | Manufacture Jaeger-LeCoultre
Very rare in watchmaking, a veritable alchemist’s workshop treats materials to give them the necessary longevity. LeCoultre masters the art of quenching, tempering and annealing – three heat treatments to prepare the components to face eternity. In this workshop, screws are heated to a very precise temperature to obtain the right blue.