Abstract While hydrogen peroxide was selected as decolorant to remove wood pulp pigment pollution on tiles, the effects of reaction environment, solvent and mixing ratio of decolorant and solvent were investigated in order to get decoloring solution with good effect, short decoloring time, high stability, less pollution and low cost. The results show that decoloring solution can remove wood pulp pigment pollution on tiles effectively while mixing ratio of hydrogen peroxide, ammonia and softened water is 1:1:3 and pH is about 11.7.
