Any Reactive dye containing a metal complex should first be boiled in a solution of a metal multivalent chelating agent (2 g/L EDTA). It is then thoroughly washed with water before alkaline reduction or oxidative stripping treatment. Complete stripping is usually carried out at elevated temperatures in alkali and powder for 30 minutes. After reduction and stripping, adequately clean. It is then subjected to cold bleaching in a sodium hypochlorite solution.
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