At first, the power which a metal plate tries to return to the original form acts while applying power on metal plate gradually. However, the shape will become changeable to the direction which is applying the power when continuing increasing the further power. A Metal plate doesn't return to original shape, even if it removed power soon.　This property is called "plasticity"  and processing which extends or compresses a material  by using this property is called "plastic processing".

Large friction occurs between the contact surfaces of a dies and a work piece while applying power to the dies without protecting the surface of a dies and a work piece. As a result, cracking,  scratches or scoring (scuffing) by frictional heating may occur to a work piece. Furthermore, it may also damage a dies. Then, it is metal working oil which is used in order to protect a dies and a work-piece by reducing friction.

Although there is processing which can also process with ordinary lubricating oils, such as machine oil, a dies and a work piece will be damaged on severe conditions, such as a deep drawing and processing of thick plates. Therefore, it is important that you select the optimal oil according to processing conditions. 

Metal working oil is constituted mixing various additive agents so that neither scoring nor scratches may occur by reducing friction with a dies and a work piece. The content is a few although the additive agent is mixing also in ordinary lubricating oils. Therefore, they may not be suitable for the metal working which is sometime accompanied with high load or the complicated distortion. In other words, although ordinary lubricating oils is used in order to inhibit friction by the lubrication (cylinders, bearings, etc.) which do not cause plastic deformation, they may be unable to correspond to large friction which occurs when metal causes plastic deformation like metal working. Therefore, we recommend using the metal working oil designed according to the purpose in order to  to reduce friction between metal surfaces and prevent generating of scratches or scoring.

Metal working oils make by blending oiliness agents, extreme pressure agents,antioxidants, corrosion inhibitors, rust preventive agents, a viscosity index improvers, etc. if needed.

When designing the performance of metal working oil, we are considering about not only good processability but also previous process, next process, health or environmental hazards.

<Designed performances>

There are many types of metal working oils according to a work material, a processing method, and other performance requirements. When classifying roughly, they are classified to types describing in the following table.

When using or discarding metal working oil, influence on wokers, the residents and natural environment around a factory or a disposal plant must be considered because metal working oil consists of various chemical substances.

Recently, various problems about a chemical substance have been taken up. As problems of metal working oil, there is a problem of a chlorinated extreme pressure agent and a problem of the degreasing process after metal working. 

The problem was widely known by having detected dioxin at the waste incineration plant and the neighborhood of that. As the reason dioxin was detected at the waste incineration plant, It is thought that dioxin is  generated when the chlorinated organic compounds cause an incomplete combustion. We continue tackling actively the development and commercial production of non-chlorinated oil used as substitution of chlorinated oil to answer this problem and the request from customer. 

Solvents or degreasing agents are used in order to remove adhering oil after metal working. However, the degreasing process costs and disposal processing of the used degreasing fluid requires time and effort and expense.

As metal working oils which solves these problems, there are quick-drying metal working oil or volatile metal working oil. These oils can skip the degreasing step after a metal working because they consist of ingredients which volatilize by nature or ventilation dryness. 

Besides, there is also a type designed so that oil remain a little in order to improve the rust prevention after processing. This type can reduce the used amount and replacement frequency of degrease liquid. 

However, they are used in mild processing in many cases because those lubricities are inferior compared with common metal working oils.