now-deactivated Rocky Flats Plant, which manufactured plutonium triggers, also called "pits", production facilities consisted of linked stainless steel gloveboxes up to 64 feet, or 20 meters, in length, which contained the equipment which forged and machined the trigger parts. The gloves were lead-lined. Other materials used in the gloveboxes included acrylic viewing windows and Benelex shielding composed of wood fiber and plastic which shielded against neutron radiation. Manipulation of the lead-lined gloves was onerous work. Some gloveboxes for radioactive work are under inert conditions, for instance, one nitrogen-filled box contains an argon-filled box. The argon box is fitted with a gas treatment system to keep the gas very pure to enable electrochemical experiments in molten salts. Gloveboxes are also used in the biological sciences when dealing with anaerobes or high-biosafety level pathogens. Gloveboxes used for hazardous materials are generally maintained at a lower pressure than the surrounding atmosphere, so that microscopic leaks result in air intake rather than hazard outflow. Gloveboxes used for hazardous materials generally incorporate HEPA filters into the exhaust, to keep the hazard contained. Gallery See also Desiccators are used for storing chemicals which are moisture-sensitive, but do not react quickly or violently with water. Fume hoods are used for hazardous material handling where less operator protection and the same atmosphere can be used. Hot cells often use remote manipulators to provide radiological containment where more operator protection is required. Sandblasting cabinets are a type of glovebox with shield the user from the high-velocity abrasive particles inside. Schlenk lines are used for manipulating oxygen- and moisture-sensitive chemicals. References External links American Glovebox Society Hans-Jürgen Bässler und Frank Lehmann: Containment Technology: Progress in the Pharmaceutical and Food Processing Industry. Springer, Berlin 2013 Laboratory equipment Gas technologies Air-free techniques Radiation protection