Glass bowl

Ribbed glass bowl made by mould-pressing. In this technique, molted glass is poured on an inverted hemispherical core, which is rotated on a turn-table until its surface is entirely covered with glass. Then a concave mould is pressed on top of the glass in order to produce thin, even walls. When the glass cools, the mould and core are removed, and the decorative ribs are created by pressing onlo the surface with wooden, metal or stone rods.