... , reduction cleaning, printing and stripping , textile bleaching .2, it is used in bleaching paper pulps, expecially mechanical pupls, it is ... in pulps.3, it is used in bleaching kaolin clay , fur bleaching and reductive whitening ,bleanching of bamboo ... sodium hrdrosulfite food additive grade is used in foodstuffs, as bleaching agent andpreservative in dried fruits , dried vegetable ,vermicelli, ...