The PROSYNTHCUT-555 are high performance, multi-purpose water soluble, semi-synthetic cutting fluids. They are formulated from high quality base oils, emulsifiers and additives to provide effective machining performance in a wide variety of operations. The higher oil content emulsion gives excellent cutting performance and outstanding machine tool lubrication and corrosion protection. They are designed for a range of light to moderate duty cutting operations to moderate to heavy duty machining and on ferrous and non-ferrous metals. The PROSYNTHCUT-555 are readily emulsifiable in water and form stable micro-emulsions. The products are engineered to be suitable for a wide range of water qualities and are resistant to foaming, even in high pressure systems. PROSYNTHCUT-555 emulsions can provide extended coolant life relative to conventional soluble oils, with proper cutting fluid maintenance.