Wet Strength Filter Papers
- For special applications requiring high wet strength
- For high pressure filtration or filter press, use to perform filtration on a variety of liquids
- 26-3, 28-3, 126-3, and 424-3 are reduced thickness filters

Grades
No. 26-3 : Thinner and higher wet strength compared with No.26, but retention efficiency is equal to No.26
No. 28-3 : Thinner and higher wet strength compared with No.28, but retention efficiency is equal to No.28
No. 126-3 : Thinner and higher wet strength compared with No.126, but retention efficiency is equal to No.126
No. 327 : Comparable to No. 27; good for maintaining high flow rates
No. 408 : Mid-grade wet strength filter
No. 412 : Comparable to No. 2; high wet strength
No. 424 : Comparatively thick filter paper; good for quick filtration of high vis- cosity fluids
No. 424-3 : Comparable to No. 424; high wet strength, good for filtering high viscosity fluids
No. 431 : Comparable to No. 131; high wet strength, good for applications requiring fine particle retention
No. 434 : Creped light brown filter with soft surface; high filtration rate
No. 436 : Creped brown filter with high wet strength