All the pressing products are sprayed with enamel while the cast pieces are dipped (as shown in the opposite picture). Porcelain enamel being transparent, the whiteness depends on the paste. The whiter the porcelain, the more it contains kaolin.
Colored enamel is obtained by dipping with glazes with an oxide basis.
After the first firing (hardening) at 950 °c, the pieces are enamelled. Then comes the second cooking called great fire at 1400 °c in a reducing atmosphere that gives a beautiful white and translucent porcelain, soft and pleasant to look at.
The great fire at 1400 °c has to last 8 hours to reach the stage of physical transformation of the paste and the enamel fusion.
Most of the plaques and buttons are decorated using the chromolithography process (laying decals). All the filets on round pieces are hand-made (golden filets – genuine gold – colored filets) as well as décors on plaques made to measure.