are divided into two series, qualitative filter paper, and quantitative filter paper. Qualitative filter papers are divided into standard grades and wet strengthened grades. Wet strengthened grades are added a small amount of chemical stabilizer on the basis of the standard grades. Qualitative filter paper ash content is less than 0.1%, and quantitative filter paper ash content is less than 0.007%. Ash content is the biggest difference between qualitative filter paper chemistry lab and quantitative filter paper. As a
filter paper manufacturers
, Hawach has disc and sheet type, regular or customized size, and shape are all available.
Grade comparison provided by laboratory filter paper manufacturer