Note: Inert-gas metal-arc welding produces 5 to 30 times more ultraviolet radiation then shielded metal-arc welding. The ultraviolet rays cause the decomposition of chlorinated solvents, liberating toxic fumes and gases.
When in use, chlorinated solvents must be kept at least 200 feet away from the exposed arc (unless shielded) and surfaces prepared with chlorinated solvents must be thoroughly dry before welding is permitted. In addition, the shading density for filter lenses must be increased. All skin must be covered to protect against flashes and radiant energy.