Bleaching is one of the stages in the manufacturing of fabric. All raw fabrics, when they are in natural form, are known as 'greige’ fabric. This greige fabric will always have natural color, odor and impurities that are not suitable for clothing.

Not only the natural impurities will remain on the greige fabric but also the add-ons that were made during its cultivation, growth and manufacture in the form of pesticides, fungicides, worm killers, sizes, lubricants, etc.
The removal of these natural coloring matters and add-ons during the previous state of manufacturing is called scouring and bleaching.