Method to produce tesserae of glass mosaic containing a metal foil

Method to make tesserae (11) for glass mosaic, containing at least an ornamental metal foil (14) inside, characterized in that it comprises the following steps:

• positioning a first glass strip (30), with which said metal foil (14) is associated above, on a work plane (20) able to be moved sequentially through a plurality of work stations (40-49), said work plane (20) including first molding means (22);
• localized heating of said work plane (20) to obtain a softening of said first glass strip (30), and casting a defined quantity of glass in its molten state onto said metal foil (14), so as to form a second glass strip (13) on said metal foil (14) for defining a semi-worked product (29) with three layers;
• pressing said semi-worked product (29) in its plastic state, to facilitate the adhesion of said three layers;
• molding said semi-worked product (29) to define the contours of said mosaic tesserae (11), by means of cooperation between second molding means (19) and said first molding means (22);
• discharge of said tesserae (11), one or more of said steps being performed sequentially in at least one of said work stations (40-49).