The Qualitative Filter Paper is usually used for general qualitative analysis and separating coarse and gelatinous precipitates from solutions in the lab or chemistry applications, but can't be used for quality analysis.SpecificationsMaterial: Paper; Color: White; Size: 60 x 60 cm / 23.62 x 23.62 inch; Flow Speed: Medium; Ash Content: ≤0.15%; Filtration Rate: 35-70 s; Bore Diameter: 15-20um; Packing List: 10 x Qualitative Filter PaperAdvantageFilter paper is a kind of paper with good filtering performance. The paper is loose and has a strong absorption performance for liquids.The paper is large enough, so you can cut it into different sizes and shapes according to your needs.