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  • Qualitative Tests
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  • Laboratory

    Wet-strengthened Qualitative Filter Papers

    Wet-strengthened filter papers are manufactured from a majority of alpha-cellulose. The smooth surface allows for fibre free filtration. They feature a high wet strength and can also be used in the filtration of strong alkaline or acid solutions. Due to their high mechanical strength, they are suited to applications where the residue is removed from the filter, for example with a spatula or a jet of water.

    Grades

    Click on a Grade to find out more...

    Grade 322

    - Fast Filtration
    Application :

    Economical filter paper used in schools and as bench protective paper

    Grade 323

    - Fast Filtration
    Application :

    Clarification of sugar cane juice after addition of lead acetate

    Grade 324

    - Fast, creped
    Application :

    For clarification of essential oils

    Grade 325

    - Very Fast Filtration
    Application :

    Filter paper used for all general works in laboratories

    Available Grades
    Grade Whatman Equivalent Speed Thickness (mm) Pore Size (μM) Weight (g/m²) Filtration Speed (sec*) Burst Strength (kg/cm²)
    322 = No.93 Fast Filtration 0.15 10-20 64 50 1.45
    323 = No.91 Fast Filtration 0.14 20-30 64 30 1.6
    324 = No.113 Fast, creped 0.45 45-65 140 14 1.8
    325 = No.114 Very Fast Filtration 0.17 17-30 73 22 1.25