A means of whitening fibres or fabrics or depriving a colored materials. This is brought about by using a variety of bleaching-brokers. Commonly chlorine is used for cotton and various vegetable fibres and peroxide and sulphur dioxide for animal fibres. Although bleach can efficiently whiten cotton, look at alternative methods https://cotton-linter05161.myparisblog.com/36430993/the-ultimate-guide-to-cotton-manufacturing