Glass casting a French commercial crystal manufacturer, produce highly sculptural pieces in pate de verre. Graphite is also used in the hot forming of glass. Graphite moulds are prepared by carving into them, machining them into curved forms, or stacking them into shapes. Molten glass is poured into a mould where it is cooled until hard enough to be removed and placed into an annealing kiln to cool slowly. Glass casting Glass casting is the process in which glass objects are cast by directing molten glass into a mould where it solidifies. The technique has been used since the Egyptian period. Modern
Ancient Egyptian pottery of decorative techniques and motifs, many of which are characteristic of specific periods. There are three points in the manufacturing process in which decoration could be added: before, during, or after the firing process. Since the predynastic period, potters added decorative elements in the molding stage, creating unusual shapes or imitating other materials, like basketwork, metal, wood or stone. The majority of the 'fancy features' were created during the process of shaping the vessel and smoothing its surfaces, long before it was fired. The elements were either shaped from a piece of clay by hand or impressed into the clay