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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 allow a 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 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 0.09 8-10 75
    324 = No.113 Fast, creped 0.43 20 130
    325 = No.114 Very Fast Filtration 0.17 17-30 73 22 1.25