Kgd Degassing 1950 Tablet is used to remove hydrogen gas from liquid aluminium. Tablet 1950 is also known as chlorine-based tablets, and the raw material is hexachlorethane. Hydrogen causes gas bubbles in casting particles. KGD Degassing 1950 Tablets dissolves immediately when immersed at the bottom of crucible or furnace and creates air bubbles which take hydrogen molecules into and raise them to the surface of liquid metal. Boil hydrogen gas along with the bubbles comes off the surface of metal bath and mixes with the atmosphere. It is used for degassing AlSi and AlMg alloys, and creates fumes and odor in reaction. These tablets are immersed at the bottom of crucibles right before casting with graphite degassing bells. For furnaces, tablets are placed at the bottom with cage-shaped boxes. Usage rate is %0.1-0.3.