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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%.

Order Number:  FT-2-209-580580

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


Carte da filtro per il laboratorio e l’industria
it 9.0 MB
Papiers filtres pour les laboratoires et l’industrie
fr 10.7 MB
Filter Papers for the Laboratory and Industry
en 9.1 MB


Laboratory Filtration Products (US and Canada)
en 9.6 MB

Product properties

  • Color
  • Dimensions
    580 mm × 580 mm
  • Weight
    84 g/m²
  • Retention Rate
    2–3 µm
  • Primary Product Type
  • Grade
  • Packaging
    Non-sterile, bulk packed
  • Pack Size
  • Material
    Refined pulp and linters, ash-free
  • Filter Type
    Qualitative Filter Papers
  • Filter Format

Technical attributes

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