Quantitative Filter Paper provided by STE-Mart is made of high-quality alpha cotton cellulose which is washed in hydrochloric acid and neutralized in an ultrapure water rinse to offer an acceptable filtering speed and strength. This filter paper is manufactured with unique and modern paper-making technology and advanced equipments. It is widely used in scientific research, industry, agriculture, medicine and health, and environmental protection, etc, for qualitative analysis, chromatographic analysis and testing.