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Qualitative Papers/ Grade 1291

These qualitative filter papers are essentially used for analytical purposes and routine analyses, whenever no gravimetric analyses are required. They are wet-strengthened and can be used for pressure and vacuum filtration. They are made of refined pulp and linters with an > 95% α-cellulose content, are very pure with an ash content < 0.1%.

Item no.:  FT-3-209-185

Price:  $31.00

Availability (ex works):  For more information please log in

  • Made of refined pulp and cotton linters with an > 95% α-cellulose content,
  • Ash content < 0,1% according to DIN 54370
  • Wet-strengthened


Filter Papers for the Laboratory and Industry
en 6.4 MB
Papiers filtres pour les laboratoires et l’industrie
fr 10.7 MB
Carte da filtro per il laboratorio e l’industria
it 9.0 MB
zh 19.0 MB


Laboratory Filtration Products (US and Canada)
en 9.6 MB
Laboratory Filtration Products
en 21.9 MB


  • Filter Diameter
    ⌀ 185 mm
  • Thickness
    0.15 mm

Materials of Construction

  • Filter Material
    Cotton Linters and Refined Pulp (> 95 % alpha-cellulose; 0% ash)

Physicochemical Information

  • Grade
  • Precipitations
    Very fine crystalline
  • Retention Rate
    2–3 µm

Product Information

  • Filter Type
    Qualitative Filter Papers
  • Pack Size
  • Packaging
    Non-sterile, bulk packed
  • Primary Product Type


  • Filter Format
  • Filter Paper/Membrane Color
  • Filtration Time
    180 s
  • Specifications
    Fine-pore, dense, very slow filtering


  • Weight
    84 g/m²