Medium-fast filter paper, for example used to filter sulphides, lead-chromate and calcium oxalate. - Filtration speed acc. to DIN 53137: 27 s. - Thickness: 0.2 mm. - Weight: 85 g / m². - Application: analytical qualitative. - Surface: machine smooth. - Filtering speed: medium fast. Medium-fast filter paper, for example used to filter sulphides, lead-chromate and calcium oxalate. - Filtration speed acc. to DIN 53137: 27 s. - Thickness: 0.2 mm. - Weight: 85 g / m². - Application: analytical qualitative. - Surface: machine smooth. - Filtering speed: medium fast.