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Environmentally progressive cleaning fluids are gaining popularity within the metal working industry. The metal cleaning fluids we use to clean and dry machined parts have changed tremendously over the past forty years. Early on, many metal working shops used chlorofluorocarbon (CFC) and hydrofluorocarbon (HCFC)-based solvents to clean. These included CFC-113, 1,1,1-trichloroethane, HCFC-141b and HCFC-225. The…