The great flexibility and versatility of the different types of machining method are particularlysignificant in the metal working industries. Although for some years now there has been growing trend towards non-cutting (forming) methods for work piece quality reasons and to save material and process costs, this has still not had any obvious effects on the volume share of lubricants. This is also apparent from the machine tools statistics. The dramatic changed prophesied in the nineteen seventies did not take place  in the nineteen eighties and nineties. Because of the particular significance of cooling for the cutting operation, this process is called cooling lubrication and the fluids used are called coolants. Apart from this term “Coolant” which is commonly used in general practice, there are also numerous others. Terms for specific application such as, for eg. cutting oils, grinding oils, reaming oils, deep hole drilling oils and honing oils   MACHING OF METALS Water Based Cutting Fluids (Soluble Cutting Oils) Neat Cutting Oils The following points concerning the storage and use of soluble oils are important.   STORAGE Exposure of packages to moisture or to excessive heat or cold should be avoided.   MIXING