Leaflet on ultraviolet radiation and the work environment. Ultraviolet radiation, an invisible short wavelength radiation, the major source of which is the sun, is also found in industrial and other workplaces where germicidal lamps, carbon arcs, welding and cutting torches, and laboratory and test equipment involving radiation are used. The factors on which the severity of radiation injury depends are given as exposure time, intensity of the radiation source, distance of the source from the exposed person, wavelength of the radiation, and the sensitivity of the individual. Since ultraviolet radiation is not visible and its effects are often delayed, it is possible to be exposed to the radiation without realizing it. The eyes and skin are especially vulnerable to injury from the radiation. Workers coming into contact with radiation should wear suitable goggles, gloves, face shields, or masks, protective clothing, and barrier creams. Hazards from ultraviolet radiation also include the production of toxic and explosive mixtures of gases from the interaction of radiation with the chemical constituents of air or its contaminants such as ozone and oxides of nitrogen. To avoid these hazards, a good ventilation system is recommended. The responsibilities of the management and the employees in taking steps to avoid the hazards of ultraviolet radiation are emphasized.