Korean Smearing Agent

Direct from the North Korean Central News Agency, we have this:

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New Casting Bonding and Heat Treatment Hardening Agent Developed

Pyongyang, November 13 (KCNA) -- University of Science in the Democratic People's Republic of Korea has succeeded in developing a new kind of casting bonding and heat treatment hardening agent. The existing bonding and hardening agent is a chemical one, which is harmful to health. Its production cost is also high.

But the newly developed agent is not made by chemical industrial method. Its production process is also simple and it is not detrimental to health in its production and use.


The new one can be used as bonding and smearing agent in casting and hardening agent in heat treatment.

It has a good fluidity and its density is changeable so as to freely adjust the cooling speed. Its application makes it possible to minimize variation and enhance hardness during quenching metal products. It, therefore, considerably improves the mechanical character of products.

When products are smeared with it, it prevents the oxidization and reduces chemical heat treatment process. It also raises the quality of processed metal goods such as gilding and elongation.