This activity has strong local cultural value, since Bourg-en-Bresse was the birthplace of Bresse enamels : they were invented there in 1397 by a master enameller in order to decorate the sword of Amédée VIII of Savoie. The workshop makes its enamelled jewellery according to traditional methods. The fine silver root is cut away using special cutting punches. Next, counter-enamel is applied under the object so that it solidifies and the colour is laid using a metal pen known as a plume sergent major, which allows the silica layer to be spread precisely. The designs are created in gold foil (gold leaf) and laid over the enamel layer using a fine brush. Lastly, after several firings, the enamellers lay the tongues and the colour (red or green) in silica powder. The workshop has its own master die stamps for the production of foil and enamelling media. It also preserves the production sheets for old pieces.