Oxygen It is used primarily for two applications: for glass melting in the furnaces and for glass polishing to give a nice shiny appearance. It is either used mixed with air or in oxy-fuel / oxy-hydrogen burners. Acetylene It finds a common use as a lubricant spread over the mould in glass bottle and tableware manufacturing. When exposed to direct heat it ensures that the glass in contact with it can be easily removed. Nitrogen Use of nitrogen is primarily to create an inert atmosphere over a tin bath and to maintain a positive pressure for float glass manufacturing. Silane Extensively used for glass coating on float glass to produce the colored variety for building applications. Hydrogen Is used mixed with nitrogen in the float glass process to displace the oxidant from the bath. It forms water when reacted with oxygen and is expelled from vets in the baths. The mixing ration of hydrogen with nitrogen varies with the amount of oxygen in the bath. Other applications of hydrogen involve heat treatment of fiber optic pre-forms. Several other gases such as helium, argon, neon and high purity specialty gases are used by the glass industry, ranging from drawing of fiber optic pre-forms to gas filling in bulbs and tube lights for imparting various colors and lighting characteristics.