SWI, an effective deinking agent prepared for the characteristics of printing ink of mixed office waste paper, is superior to the imported deinking agents and the cost is lower by 73.3%. 针对混合办公废纸油墨的特点,采用复配的方法研制开发的高效脱墨剂SWI,脱墨效果优于同类进口产品,而成本则比进口脱墨剂低73.3%。