From the production of enamel powder to the final polishing step, enamelling is an age-old Métier d’Art performed by hand by master enamellers. Since no formal school exists, the knowledge and savoir-faire is passed down from experienced artisans to young talents.

Enamel is comprised of a mixture of silica, minium, potash and soda which are ground into a powder. Additional metal oxides are added to create different coloured enamels. The powder is dusted onto the dial cavities and then fired in a kiln that typically operates at about 800°C. This process is repeated on 5 to 10 occasions to achieve the desired lustrous finish. Grand feu enamelling takes considerable expertise to master, however, even with experience, there remains an inherent measure of unpredictability through the repeated firings which can result in cracks appearing, air bubbles and colour imperfections. However, the main benefit of this protracted process is that the flawless grand feu enamel dials will retain their colour forever.