The qualitative filter papers are made of refined pulp and linters with more than 95% alpha-cellulose content. The ash content of these filter papers is approx. <0.1%. They are essentially used for qualitative analyses.
Two categories of qualitative filter papers are offered: standard strength and with increased wet strength especially suitable for vacuum filtration or pressure filtration. They are available in different formats -rolls, sheets, discs, and folded filters. Circles and sheets. Qualitative. Slightly thicker and more retentive than number 1. Flowrate: Retention: Wet strength: Thickness: Ash: Medium/Fast Medium Low 0.19mm 0.06% Dia. 90 mm