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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.


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