The term DECOLOUR is a verb that can be used to describe the process of removing colour from something. It can be achieved in various ways, such as bleaching, blenching, and blanching. Bleaching is a chemical process that uses chlorine or oxygen to remove colour from fabrics or other materials. Blenching is a similar process, but it uses hydrogen peroxide instead of chlorine or oxygen. Blanching is a physical process that involves boiling or steaming an item to remove its colour. All three processes are effective ways to decolour items.