Abstract
In order to establish a bleaching method for cotton fabrics under a mild condition, we attempted to treat the fabrics with various concentrations of ferrous sulfate solution prior to hydrogen peroxide bleaching. The whiteness index (WI) and tensile strength for cotton were measured and compared with those of alkaline bleaching. It was observed that the pH for the bleaching solution changed during bleaching, as a result of the pretreatment conditions such as ferrous sulfate concentration and immersion period. In addition, the WI and tensile strength for cotton were determined by the pH of the bleaching solution after bleaching.
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