In the polishing workshop, the workers’ task is to remove imperfections, such as tool or mould marks. They also highlight the relief patterns and make the object unique. The satin repolish finish specific to the Lalique manufacture requires manual mechanical polishing to obtain the desired gradation. The crystal piece is brought into contact with a polishing wheel which gives it a shiny appearance (photo). Glassmakers produce translucent glass, more or less pure, tinted or not in the mass by metallic oxides such as copper, nickel, chrome, cobalt and manganese.