Dear student
A layer of metal is deposited on a microfiber cloth is due to phenomena of Electroplating.
The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating. It is one of the most common applications of chemical effects of electric current. The metal to be electroplated is made the cathode, while the anode is the other metal which has to be deposited on this metal. After passing electric current through the electrolyte, the metal from the anode is deposited on the cathode.
Here hot metal transfer electric current and thus layer of metal is deposited on microfiber cloth.
Regards