Materials and methods of execution

Our stained glass panels, created with mouth-blown glass, cathedral and other multicolored glass are painted entirely by hand with the medieval technique of the fired grisaille

Grisaille is a pigment made up of a mixture of metal oxides (copper or iron) and powdered, low-temperature-melting glass. It is used with a brush, after being dissolved in an oil or water medium.The painted glass tiles are then fired at 600 degrees Celsius . This allows for the pigment to stick to the glass, which, at that temperature, begins to melt on the surface. The first firing is followed by a second firing which is necessary to deepen the shadows and to add the polychrome enamels and the silver yellows. The enamels are pigments that become vitreous. The silver yellows (made with silver salts) are used to obtain the hues from yellows to orange. A new firing follows the second painting. After that the stained glass panel is assembled by applying lead between the adjoining tiles and by soldering the corners with tin.

To finish, the small gaps between glass and lead are filled with a linseed oil based putty. This consolidates and finishes the panel.