Filter papers-Round filters, MN 640 d, slow filtering, Ø 70 mm, 100 unit(s)

For qualitative analysis. Made from refined pulp washed in acid and linters with a α cellulose content of over 95%. Ash content <0.01%. Temperature stable up to approx. +130 °C. Surface weight: 85 g/m².

Low filtration speed. Filtration time according to DIN 53137: 140 s. Equivalent blue strip. Density filters for all fine and super fine deposits. Retention range: >2 μm.