While dyeing or printing the polyester or acrylic materials, the presence of metal ion impurities in the print paste or the dye bath often create problems like change of the tone of the dye used, loss of colour value .etc. To avoid this if chelating agents like EDTA salts are used they interfere with the metal ions present in some of the dye molecules and hence they can not be used. The Phosphate based Chelating agents take care of the impurities like Calcium, Magnacium etc. only. METGRIP 9 takes care of this problem. It easily chelates the metal ions like iron copper etc.from the dye bath or printing media without disturbing the metal ions from some of the metal complex dyes.