Leading filter paper, chemical analysis filter paper, qualitative filter paper, quantitative filter paper. Automotive filter paper, air filter paper, engine oil filter paper, diesel filter paper. Is manufactured with high grade fine cotton as raw material, through modern original paper making technology and advanced paper making equipment. It's pure cotton paper of high purity&certain strength. The products are widely used for scientific research, industry, agriculture, medicine &hygiene, as well as environmental protection, etc. For use of qualitative &quantitative analysis as well as qualitative&quantitative chromatographic analysis and test.