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HT-HAS bs is a powerful reducing agent, which can effectively remove unfixed disperse dyes in an acidic state to achieve the required fastness. The traditional reduction cleaning method is to use sodium hydroxide and hydrosulfite, which usually needs to be drained for reuse, while HT-HAS bs is directly added to the dye bath for reduction cleaning after cooling down, without draining water, which can effectively save energy, water and time. and reduce wastewater.