Question

what are meaning of etching

Answer 1

Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio in the metal. In modern manufacturing, other chemicals may be used on other types of material.

Answer 2

when sometimes you feel irritation on skin which causes redness to skin and our will urges us to scratch the skin is called as etching