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Wet Strengthened Qualitative Filter Paper

As the name suggests wet strengthened filter papers have been manufactured to maintain a certain level of strength when wet. These filter papers are suited for vacuum filtration and filtration or strongly acidic or alkaline solutions.

Grade
Whatman Equivalent
322
= No.93
  • SpeedMedium
  • Filteration Speed (sec) 22
  • Thickness (mm) 0.16
  • Retention Capacity 4 - 12
  • Weight (g/m2) 70
  • Burst Strength (kg/cm2) Light
Grade 322
Grade 322 is the most used wet strengthened filter paper. This filter paper has a medium flow rate and retention capacity and is most used in educational settings.
Sizes (Diameter/mm)
Product Code
323
= No.91
  • SpeedMedium
  • Filteration Speed (sec) 22
  • Thickness (mm) 0.16
  • Retention Capacity 4 - 12
  • Weight (g/m2) 70
  • Burst Strength (kg/cm2) Light
Grade 323
Grade 323 has similar properties to Grade 322 but has a creped surface rather than smooth. This filter paper can be used for less critical analysis and is often used in the food industry to assay sucrose in cane sugar.
Sizes (Diameter/mm)
Product Code
324
= No.113
  • SpeedFast
  • Filteration Speed (sec) 14
  • Thickness (mm) 0.53
  • Retention Capacity 12 - 25
  • Weight (g/m2) 135
  • Burst Strength (kg/cm2) Light
Grade 324
Grade 324 has a creped surface that increases filtration speed making this filter paper very fast. The retention capacity is low, suited for the filtration of coarse particles or gelatinous precipitates like grade 305.
Sizes (Diameter/mm)
Product Code
325
= No.114
  • SpeedMedium
  • Filteration Speed (sec) 27
  • Thickness (mm) 0.20
  • Retention Capacity 4 - 12
  • Weight (g/m2) 85
  • Burst Strength (kg/cm2) Light
Grade 325
Grade 325 is thinner than grade 324 but suited for filtering the same coarse particles or gelatinous precipitates.
Sizes (Diameter/mm)
Product Code
Grade Whatman
Equivalent		 Speed Filteration Speed
(sec)		 Thickness
(mm)		 Retention Capacity Weight
(g/m2)		 Burst Strength
(kg/cm2)
322 + = No.93 Medium 22 0.16 4 - 12 70 Light
323 + = No.91 Medium 22 0.16 4 - 12 70 Light
324 + = No.113 Fast 14 0.53 12 - 25 135 Light
325 + = No.114 Medium 27 0.20 4 - 12 85 Light