Industrial fluids are used for heat transfer, lubrication, power transmission, corrosion control, process cleaning and other specialized applications. They consist of petroleum-based mineral oils, vegetable oils, synthetic fluids, or other types of base stocks that are processed for stability and resilience. Industrial fluid or machinery fluid additives increase desirable physical, chemical and electrical characteristics, and reduce friction and wear. Typically, an industrial lubricant is formulated for long life in demanding environments that are characterized by extremes of pressure and temperature. Industrial lubrication products include metalworking fluids, system cleaners, slideway lubricants, industrial gear oils, hydraulic oils, and turbine oils. Heat transfer fluid is an industrial fluid made from base stocks such as paraffin oils, with added chemicals to improve heat transfer properties. Industrial fluids such as heat transfer fluid are characterized by the temperature of intended use. There are three basic types of heat transfer fluids: high temperature (100 ?F up to 600 ?F), single fluid heating and cooling (30 ?F to 550 ?F), and low temperature (cryogenic temperatures as low as -150? F). Magnetic fluid contains suspended magnetic particles. They become dense when subjected to a magnetic field.