Heating or Freeze Drying oven is a must when it is required to fast and reliably remove remaining solvents or water from the material. Heat and extreme cold are both suitable to remove gases from material. There are also high temperature ovens to melt metal.  Laboratory oven is a thermally insulated chamber used for the heating and drying of a substance. Kilns and furnaces are special-purpose ovens used in pottery and metalworking, respectively. Freeze drying, also known as lyophilisation or cryodesiccation, is a low temperature dehydration process.