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Explain what you see in the following picture 

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This  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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