Dense filter paper for fine and very fine precipitates with high retention capacity and very slow filtration speed. - Filtration speed acc. to DIN 53137: 140 s. - Thickness: 0.17 mm. - Weight: 85 g / m². - Application: analytical qualitative. - Surface: machine smooth. - Filtering speed: slow. Dense filter paper for fine and very fine precipitates with high retention capacity and very slow filtration speed. - Filtration speed acc. to DIN 53137: 140 s. - Thickness: 0.17 mm. - Weight: 85 g / m². - Application: analytical qualitative. - Surface: machine smooth. - Filtering speed: slow.