... cleaning, printing and stripping, textile bleaching .(2). It is also used in bleaching paper pulps , especially mechanical pulps, ... . (3). It is used in bleaching kaolin clay, fur bleaching and reductive whitening, bleaching of bamboo products and straw products, ... hydrosulfite food additive grade is used in foodstuffs, as bleaching agent and preservative dried fruits, dried vegetable, vermicelli, ...