Explain what you see in the following picture

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Solution

The above picture shows the process of powder coating.

A polymer resin, a pigment and some more ingredients are melted, mixed, cooled and ground into a uniform powder.

This powder is sprayed on the polished metal surface by electrostatic spray deposition (a method in which the particles of powder are given an electric charge) that makes a uniform coating on the substance.

Once completely coated, the object is then heated, which results in the formation of long cross-linked polymeric chains.

This coating is highly durable, hard and attractive.

It can be done on plastic and medium density fibre board as well.

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