Which effect of electricity is used in electrotype set-ting ? Discuss.

Explanation

In the newspaper press, a page is composed using ordinary types. Moulds of letters first prepared by using wax and graphite powder is spread over it to make it to conduct electricity. This is used as a cathode in the electrolysis of copper sulphate. A piece of copper is used as the anode. A thick plating of copper is obtained and the wax inside it is melted and removed. These copper letters are used to print thousands of copies of the newspaper page. This is called electrotype setting.