Skip to content Skip to navigation menu

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-3-209-055

Availability:  On Request

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


zh 19.0 MB
Filter Papers for the Laboratory and Industry
en 9.1 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


Laboratory Filtration Products (US and Canada)
en 9.6 MB

Product properties

  • Grade
  • Primary Product Type
  • Color
  • Material
    Refined pulp and linters, ash-free
  • Filter Format
  • Filter Type
    Qualitative Filter Papers
  • Dimensions
    55 mm
  • Retention Rate
    2–3 µm
  • Pack Size
  • Packaging
    Non-sterile, bulk packed
  • Weight
    84 g/m²

Technical attributes

  • Specifications
    Fine-pore, dense, very slow filtering
  • Filter Material
    Cotton Linters and Refined Pulp (> 95 % alpha-cellulose)
  • Precipitations
    Very fine crystalline
  • Thickness
    0.15 mm
  • Area of Application
    • Clarification
    • Analytical Sample Preparation
    • Particle Analysis
  • Filtration Time
    180 s